Scheme Crash Course¶
This crash course on Scheme that I’m writing is the kind of course that I would had liked before starting to read SICP. This crash course is geared towards people who are already familiar with some programming language and want to start with SICP but are not really comfortable Scheme or any LISP for that matter. All the Python code in this blog is Python 3 compatible and all the Scheme code is MIT-Scheme compatible.
The whole blog post is written in such a way that you should be able to pick up Scheme in an hour or so by typing out the programs in an online Scheme interpreter and see how the things work there. The examples here are in two languages namely Python and obviously Scheme. Every concept here is first introduced in Python and then a exact implementaion is shown in Scheme. The main reason for choosing Python is that it is very easy and looks a lot like pseudocode and for those who don’t know the language can easily undrstand the code.
Arithematic operations¶
Since Scheme is a LISP it does not have operators that we can use in a infix notation, so we have operators
like +
, -
, *
, /
which have to be used in prefix notation.
To make this easier let’s visualize these operators to be nothing but functions, which they actually are
and makes much more sense when think them to be like that.
We will therefore assume that the languages that we are comparing Scheme do not have arithematic operators
but have functions like add()
, subtract()
, multiply()
,
divide()
. Let’s start writing some of these arithematic operators in Python. After the Python
block of the code the exact Scheme version of the same will be shown in the block below it.
1 2 3 4 5 6 7 8 9 10 11 | # (1 + 2) * (5 - 3) / 9
divide(multiply(add(1, 2), subtract(5, 3)), 9) # => 0.666666666666666
# 3 + 4 + 5 + 6 + 8
add(3, 4, 5, 6, 8) # => 26
# 9 * 9 - 3 - 5 - 3
subtract(multiply(9, 9), 3, 5, 3) # => 70
# zero arguments
add() # => 0
|
1 2 3 4 5 6 7 8 9 10 11 | ; (1 + 2) * (5 - 3) / 9
(/ (* (+ 1 2) (- 5 3)) 9) ; => Value: 2/3
; 3 + 4 + 5 + 6 + 8
(+ 3 4 5 6 8) ; => Value: 26
; 9 * 9 - 3 - 5 - 3
(- (* 9 9) 3 5 3) ; => Value: 70
# zero arguments
(+) # => 0
|
Let’s first try to understand the above code. The Python part of the code has these functions
add()
: subtract()
, multiply()
, divide()
.
There functions take any number of arguments on which the respective operation is to be
recursively performed. For exaple in subtract() the first argument will be taken
and one after the other all the remaining arguments of subtract() will be
subtracted from till ultimately just one value is left. In case if no arguments are passed
then a 0
will be returned.
Now let’s try to understand the Scheme code. Scheme is a typical LISP so every function call is
enclosed in parenthesis. All the arguments passed to the function are separated with spaces.
The first argument or the word that follows just after (
is the call to that function.
For eample in (+ 2 3)
, +
is the function call to add and 2
and 3
are the arguments passed to that add function.
Variables¶
# define a variable MAX that holds 500
> MAX = 500
> MAX # => 500
# define a constant PI that returns the value of PI
> PI = 3.14
> PI # => 3.14
# compute sum of two numbers and store it in a variable
> SUM = 3 + 6
> SUM # => 9
; define a variable MAX that holds 500
> (define max 500)
> max ; => Value: 500
; define a constant PI that returns the value of PI
> (define pi 3.14)
> pi ; => Value: 3.14
; compute sum of two numbers and store it in a variable
> (define sum (+ 3 6))
> sum ; => Value: 9
Let’s now look at these above things as variables, but name value binding. What exactly do we mean by name value binding? Simply stating it’s that when we enter that name, it is evaluated to it’s respective value that it was assigned to. This name can be later changed in the code be reassigning another value to that variable. To prevent that, we should take care about the kind of name that we give to the variables. Naming should be such that we do not reassign that name to something else. In other words even though the so called variables are not constant they should be treated as such or else they will not maintain referential transparency <https://en.wikipedia.org/wiki/Referential_transparency>.
The syntax for defining a variable is very easy. Take the example of PI (define PI 3.14)
.
Whatever follows define is a new name with which we are associating a value, PI
in this
case is the name and 3.14
is the value associated with it. That is simply how assigning
variables work in Scheme. The we can also evaluate an expression as a value assigned to name, this is
done for sum
in the code snippet shown above.
Functions¶
# Lambda implementation of square function
> square = lambda x: x * x
> square(7) # => 49
# Square implementation as function (syntactic sugar)
> def square(x):
return x * x
> square(7)
; Lambda implementation of square function
> (define square (lambda (x) (* x x)))
> (square 7) ; => Value: 49
; Square implementation as function (syntactic sugar)
> (define (square x) (* x x))
> (square 7) ; => Value: 49
By default in Scheme we define variable of which the value is lambda which is first shown in Python. In Python this is not the default way we define a function. But this is again written in that way because that’s how it is done in Scheme. The second function that shows default way of implementing functions in Python. The same is shown in Scheme which is nothing but syntactic sugar for binding lambdas to name.
Taking a decision¶
# Old enough to drink string
def old_enough(age):
if age >= 18:
return "Yes"
else:
return "No"
old_enough(34)
old_enough(17)
# Check if a given number is even returns the respective string
def is_even(number):
if number % 2 == 0:
return "Yes"
else:
return "No"
is_even(2)
is_even(3)
; old enough to drink string
> (define (old-enough age)
> (if (>= age 18) "Yes" "No"))
> (old-enough 34) ; => Value: "Yes"
> (old-enough 17) ; => Value: "No"
; Check if a given number is even returns the respective string
> (define (is-even number) (if (= 0 (remainder number 2)) "Yes" "No"))
> (is-even 2) ; => Value: "Yes"
> (is-even 3) ; => Value: "No"
Now we have to decide if the age of the person which is entered is of legal drinking age of not. Since we’re
comparing with a functional language, let’s do it in Python the way we would do it in Scheme. So we define a
function called is_even()
and we pass the age to it. Inside the function has an if statement that
returns the string which is either "Yes"
or "No"
depending on if he is legal or not. The
Scheme version of this looks very similar in which if
is the function call of which the first argument
is an expression that evaluates to a boolean value. Where it (>= age 18)
checks if age is greater than
18 or not. If the expression evaluates to lol
List: Getting length¶
# Recursively iterating to get the length of the list
def length_of_list(lst, current_length=0):
if lst == []:
return current_length
return length_of_list(lst[1:], current_length+1)
; recursively iterating to get the length of the list
List: Concatenating two lists¶
# Simply concatenating two lists
[1, 2, 3, 4] + [5, 6, 7]
[1, 2, 3, 4, 5, 6, 7]
; Simply concatenating two lists (cons)
List: Appending element to list¶
# Simply appending element to list
[1, 2, 3, 4, 5].append(6)
; Simply appending element to list
List: Reversing¶
# Recursively iterating to reverse the list
def reverse_list(lst, new_lst=[]):
if lst == []:
return new_lst
return reverse_list(lst[1:], list(lst[1]) + new_lst)
# Use the reverse function provided by the language
list(reversed([1, 2, 3, 4, 5])) # => [5, 4, 3, 2, 1]
; recursively iterating to reverse the list (use car, cdr and cons)
; Use the reverse function provided by the language
Compute factorial¶
def factorial(number, current_product=1):
if number == 1:
return current_product
return factorial(number-1, current_product * number)
; some scheme code here
Compute fibonacci¶
def fibonacci(count, current_list=[], previous=0, current=1):
if len(current_list) == count:
return current_list
return fibonacci(count, current_list.append(previous), previous=current, current=previous+current)
; some scheme code here
Find element in the list¶
def search_element(lst, key, index=0):
if index == len(lst):
return None
if lst[index] == key:
return index
return search_element(lst, key, index+1)
; some scheme code ehre
Simple input and output¶
int(input()) + 45 # input an int and add 45 to it
print("Enter your name: ")
"Hello " + input() # output a prompt and take string input name and say hello
; some scheme code here
Writing tests¶
# Some python code here
(load "test-manager/load.scm")
(load "src/ex_1.2.scm")
(in-test-group
translation-of-an-expression-into-prefix-form
(define-test (expression-infix)
(assert-= (expression) -37/150)))
(run-registered-tests)


Added support for Pixel & Tonic Field Pack Multi Select field type.
Fixed a bug where remote file importing via FTP (not sFTP) wasn't working.
Fixed a bug where member importing would report as successful, despite not being the case when some custom fields were set as required.
Version 2.2.5 (August 1, 2014)
Added a loading image to the Settings form to indicate when channel information is being loaded in the background.
Updated size allowance from ~65k to ~16,777k for Import profiles where the source is an uploaded file, fixing errors pertaining to large files being auto-truncated when using MySQL in non-strict modes.
Fixed a bug where XML imports with namespaced child elements could throw errors in some situations.
Fixed a bug where Control Panel error messages were incorrectly calling CP headers and footers and could result in PHP errors instead of a clear error message.
Fixed a bug where third party addons using the 'custom_field_data' hook would error when used in conjunction with Importer during imports.
Version 2.2.4 (April 17, 2014)
Updated for compatibility with ExpressionEngine 2.8.
Fixed a bug where the "Keep Old Categories and Add the New" option for the "Duplicate Entry Action for Categories" setting would remove old categories.
Version 2.2.3 (September 25, 2013)
Updated for compatibility with ExpressionEngine 2.7.
Fixed a bug in EE 2.6+ where 'edit_dates' on entries were being inserted improperly.
Fixed a bug in EE 2.6+ where mysql errors could occur on member import.
Fixed a bug where XML imports would fail when a title was missing, even when a default was set.
Fixed a bug where item counts in batch imports were incorrect.
Fixed a bug where native EE date fields would accept very few if any types of inputs (more accurate acceptance of human readable dates is achieveable using EE 2.6+ due to changes in how EE itself handles dates).
Fixed a bug where default Solspace Tag inputs were not being parsed when the entry tag data was empty.
Version 2.2.2 (May 21, 2013)
Fixed a bug where batch importing could cause potential PHP errors in EE 2.6+ and fail to run, resulting an error alert.
Version 2.2.1 (May 3, 2013)
Updated for compatibility with ExpressionEngine 2.6.
Fixed a javascript error occuring on the Import Log control panel page.
Fixed potential PHP errors when importing into channels with Solspace Tag fields.
Version 2.2.0 (March 20, 2013)
Added multiple EE Relationships custom field to Playa field importing.
Added multiple Playa custom fields to a single Playa field importing.
Added CSV, JSON, XML to EE Members importing.
Added ability to clear out Cron Batches via Right Menu button at top of Importer CP homepage.
Added URL Title field to Channel Entries import.
Added support for Namespaced elements in XML Files.
Updated Importer to allow JSON elements with values of NULL, TRUE/FALSE, and Numeric.
Updated Importer to now have JSON elements with a boolean value being inserted into a radio, checkbox, or select field match to y/yes (TRUE) or n/no (FALSE).
Updated for a few performance tweaks.
Updates are now automatic and no longer require a manual update screen.
Fixed a bug where Default Value for the Entry Title (Channel Entries) would not work if Element specified but did not exist.
Fixed a bug where UNIX timestamps below 0 were not being imported correctly.
Fixed a bug where "Duplicate Entry Action for Categories" in Channel Entries setting was not sticking in Settings Form.
Fixed a bug where Default Values for Custom Fields were not being saved in Firefox.
Fixed a bug where when updating Channel Entries, versioning was disabled incorrectly.
Fixed a bug where the Channel Entries API cleared out Assets data on update.
Removed distinct Solspace Tags parsing for Channel Entries, replaced with Solspace Tags custom field parsing ability.
Version 2.1.0 (May 24, 2012)
Added support for P&T Matrix (2.3+), P&T Playa (4.2+), and EE Date field types.
Fixed a bug where no data would be imported if the first row of titles in CSV imports contained a slash character ("/").
Version 2.0.3 (April 20, 2012)
Added an automatic url_title creator that takes into account the Channel's URL Title Prefix.
Improved the processing speed of new entries.
Fixed a bug where new installs did not have a critical MySQL field required for batch processing added.
Fixed a bug where the duplicate entry check would not work on Title fields with data longer than 100 characters.
Fixed a bug where one of Importer's extension hooks (cp_js_end) was intefering with other third party's hooks.
Fixed a bug where Updated Entries would lose existing custom field data, if that field was not updated in the data source.
Version 2.0.2 (February 15, 2012)
Added the ability to import into Expiration Date.
Modified the CSV parsing to be compatible with versions below PHP 5.3.
Modified the AJAX code to always go to the CP to work better with throttling, MSM, and subdomains.
Fixed a bug where unprocessed batches were not being removed from the database.
Version 2.0.1 (January 5, 2012)
Added the ability to specify a primary element for JSON imports, allowing one to import more complicated data.
Modified the entry date parsing for Channel Entries to accept Unix timestamp.
Fixed a bug where Strict XML was not correctly importing CDATA data.
Fixed a bug where Loose XML was limiting the number of possible XML elements in data array to 20.
Fixed a bug where the Category Field Data row was not put into the DB when creating new categories.
Fixed a bug where Batch Importing was not working when ExpressionEngine Throttling was enabled.
Version 2.0.0 (December 22, 2011)
Completely rebuilt Importer, using the Solspace Add-on Builder Framework (add-on is EE2 compatible only).


Of course this is ignoring other, more broadly applicable developments, such as multi-tasking operating systems.
All apologies in advance to my father-in-law Ed (a scientist) and my brother-in-law Holger (a mathematician) from me (an engineer).
In the rest of this discussion, the scientist has gone for coffee, uninterested because there is nothing pre-existing to study, only new things being spun out of the air.
The C Programming Language, Second Edition, by Kernigan, Brian W. and Ritchie, Dennis M., Copyright 1988, 1978 by Bell Telephone Laboratories, Incorporated Prentice Hall P T R, Englewood Cliffs, NewJersey 07632
For consing operations that can be called from either context, you can
declare a consing area of either
, but in practice that is fairly rare.
There is an argument that they should be aligned on 8 byte addresses. There are two advantages to 8 byte alignment. One is that it would enable us to reliably store immediate double floats and pointers into the same array. The second is that it would can give us an immediate type tag for conses that is itself the offset to the cdr of a cons. The argument for 4 byte alignment is that all current C compilers we use align structures on 4 byte addresses, but some won't align them on 8 byte addresses, even if they contain doubles. The other argument for 4 byte alignment is that we would not need to occasionally skip forward 4 bytes when allocating from heap in order to find the next 8 byte aligned address. For now, the 4 byte alignment wins.
Kim Barrett recently made a convincing argument for an immediate type tag of zero for fixnums. With this approach there is no bit fiddling needed for fixnum numeric operations. I had originally dismissed this approach since it would require pointer arithmatic to be done to fetch the type tag of an object. However, since most processors have a single instruction that can fetch from an address plus offset, this becomes a moot point. For now, the existing scheme carries the day due to inertia. -jallard, 10/31/99
The Alpha OSF has since been renamed DEC UNIX.
The following comment applies only to 8 byte alignment: For example, we could put immediate floats into odd-indexed simple vector locations, and those floats would consume 2 elements. For structures and frames, this could provide significant savings. -jra 8/30/95
This note about classes is being written in anticipation of their implementation. -jallard 10/29/99
This latter idea of having a "reclaimed flag" has never been implemented. -jallard 10/12/99
Rest arguments have since been added. -jallard 10/9/99.
This document was generated on 12 October 2001 using texi2html 1.56k.


Prof. David R. Cheriton
Computer Science Department
Stanford University
- Professor David Cheriton cheriton at cs.stanford.edu
- Gates 439, Ph.<PHONE_NUMBER>
Secretary
Uma Mulukutla uma at cs.Stanford.EDU
Gates 303, ph.<PHONE_NUMBER>, 8am-12 and 1pm-4:00 M-F
Research Group
Distributed Systems Group
Courses
CS249A Object-oriented Programming from a Modeling and Simulation Perspective
CS249B Advanced Object-oriented Programming
CS244b Distributed Systems
CS244c Distributed Systems Lab
Last Updated 9/22/08.


Button Tales
A Mishap in Three Parts
Part 1: Unfortunately Buttons
... in which the hero seeks great treasure
Part 2: Regrettably Buttons
... in which the hero clears great confusion
Part 3: Forever Buttons
... in which the hero brings peace


WQMY
Ocean Air Services Inc, phone#<PHONE_NUMBER>, Kenner, LA, , 70062
New Orleans, LA 70123. /johnstone-supply-new-orleans-la.html. Jackson Supply Company. New Orleans, LA 70123. /jackson-supply-company-new-orleans-la.
http://www.2findlocal.com/ocean-air-services-inc-new-orleans-la.html
| 2001 honda accord oil type/saltwater to kill roots/ mountain view laser eye surgery |
|
|---|---|
| examples of repetition in literature | Williamsport |
| Branding | MyNetworkTV jackson supply new orleans |
| report file size nagios windows | winter garden check list: 29 (cannot connect to wired network) & buy fallout 3 pc-DT 45.3 (UHF) |
| legden seek seson 1 | see article |
| Owner | New Age Media, LLC Party Supplies New Orleans, LA |
| First air date | December 30, 1988 |
| analysis of wrong turn at lungfish | MYNetworkTV |
| ways people use duct tape | WOLF-TV, the relavant anatomical project topics |
| 57 mountain doppler radar | WILF (1988-2006) |
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| exercises to do in bed | 52075 73375 (WOLF-DT3) |
| Transmitter coordinates | bee gees reunion tour dates 57 mountain doppler radar (WOLF-DT3) |
Wood Paneling Supplies New Orleans LA - The Wood Whisperer
Local resource for Wood Paneling Supplies in New Orleans. Includes detailed information on . Data Provided By: Jackson Custom Woodworks 1-504-754- 2196 .
http://localmarket.thewoodwhisperer.com/Wood_Paneling_Supplies_New_Orleans_LA-p1553326-New_Orleans_LA.html
Jackson Supply Co in New Orleans, LA 70123 - NOLA.com
Aug 26, 2009 . Jackson Supply Co at 5705 Powell St, New Orleans, LA 70123.
http://businessfinder.nola.com/1604502/Jackson-Supply-Company-New-Orleans-LA
Contents |
[chadder day by day summary] History
Jackson Supply Company
This Website is currently under construction. Hard hat section. Jackson Supply Company.<PHONE_NUMBER> 6655 Roxburgh Drive STE 200, Houston, TX 77041 .
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Contact - security data supply
New Orleans Area 3204 48th St. Metairie, LA 70001 . Jackson MS Area Security Data Supply of Jackson LLC 505 Julienne Street Jackson, MS 39201 .
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JACKSON SUPPLY CO in Mandeville, LA 70471 - NOLA.com
JACKSON SUPPLY CO at 1848 South Ln, Mandeville, LA 70471. . City OR zip code. Invite a friend! Sign in · Sign up. Find Local Businesses in New Orleans .
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Ferguson Enterprises, Inc.: Plumbing & Builder Products
Ferguson supplies products to the Professional Contractor, Builder, Engineer and Homeowner. With distribution centers and showrooms nationwide, Ferguson .
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Jackson Welding & Gas Products
We supply customer focused solution to companies in biomedical technology, . allowed Jackson Welding & Gas Products to elevate its capabilities to face new .
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Results 1 - 11 of 11 . Find Store Fixtures, Counters, & Showcases in New Orleans maps with reviews, websites, phone numbers, . 1539 Jackson Ave, Ste 450 .
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new orleans business/commercial - by owner classifieds - craigslist
new orleans business/commercial - by owner classifieds - craigslist. . Sat Apr 06 . USED SUPERMARKET EQUIPMENT $1 (HOUMA) . Coolers - ice machines - freezers - vent hoods - tables - sinks (Jackson ms) pic. 2 portable sinks $500 .
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Capture of New Orleans - Wikipedia, the free encyclopedia
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http://en.wikipedia.org/wiki/Capture_of_New_Orleans
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Dec 6, 2012 . NEW ORLEANS--(BUSINESS WIRE)--Jackson Offshore Operators, LLC has . Florida to build two new platform supply vessels (PSVs) that will .
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[income tax preparer instructions] Digital channels
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|---|---|---|---|---|
| 53.1 | jackson supply new orleans DT | kevin roach ge fanuc | south american noni juice | Main jackson supply new orleans programming / MyNetworkTV |
| 53.2 | WOLF DT | satellite service and quali serv | under shady garden walls | Simulcast of satellite service and quali serv |
| 53.3 | WSWB DT | 480i | 4:3 | Simulcast of chemical fertilizers must a gardener take |
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[repair thinkpad rage mobility restore display] References
[young girls age 10] External links
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- demi moore and ashtons home
- henry kissinger's work as a scientist
- coturnix quail day old chicks
- peter o'toole my favorite year
- new zip codes polk county florida
|
|


Index
A D G H K L M S V
All Classes|All Packages
All Classes|All Packages
All Classes|All Packages
A
- Access - Class in <Unnamed>
-
Access
class provides the authentication page and all associated utilities for the same. - Access() - Constructor for class Access
-
Default constrctor provided for
Access
class. - actionPerformed(ActionEvent) - Method in class Dashboard
-
Overriden method of
ActionListener
. - actionPerformed(ActionEvent) - Method in class Game
-
Overriden method of
ActionListener
.
D
- dashboard() - Static method in class GUI
-
Plugs the panel generated by
Dashboard
class into the JFrame. - Dashboard - Class in <Unnamed>
-
Dashboard
class provides the dashboard page and all associated utilities for the same. - Dashboard() - Constructor for class Dashboard
-
Default constrctor provided for
Dashboard
class.
G
- game() - Static method in class GUI
-
Plugs the panel generated by
Game
class into the JFrame. - Game - Class in <Unnamed>
-
Game
class provides the actual HangMan game and and all associated utilities for the same. - Game() - Constructor for class Game
-
Default constrctor provided for
Game
class. - GUI - Class in <Unnamed>
-
The
GUI
class generates a frame for the entire application. - GUI() - Constructor for class GUI
-
Invokation of the constructor generates a new
JFrame
for the application.
H
- HangMan - Class in <Unnamed>
-
HangMan
class is the actual brain of the HangMan game and and provides all associated utilities for the same. - HangMan() - Constructor for class HangMan
-
Default constructor.
K
- keyPressed(KeyEvent) - Method in class Game
-
Overriden method of
KeyListener
. - keyReleased(KeyEvent) - Method in class Game
-
Overriden method of
KeyListener
. - keyTyped(KeyEvent) - Method in class Game
-
Overriden method of
KeyListener
.
L
M
- main(String[]) - Static method in class Main
-
The one and only intended entry point.
- Main - Class in <Unnamed>
-
The
Main
class is the entry point for the HangMan application. - Main() - Constructor for class Main
-
Default constructor left as is, since there are no instance fields specific to the class.
S
V
- validate(char) - Method in class HangMan
-
Validates a letter guessed by the
Game
class.
All Classes|All Packages


Service Manager
You can create or visualize a service!
Service Creation
Service Visualization
<<
Map


---
layout: post
title: Apple Displays for 1/3 the price?
date: '2012-08-24T14:03:00.002-04:00'
author: Daniel Smith
tags:
- monitor
- '27'
- display
- maximum pc
- 2560x1440
- apple
modified_time: '2012-08-24T14:03:39.738-04:00'
blogger_id: tag:blogger.com,1999:blog-358950712929443967.post-5179662875002077936
blogger_orig_url: http://www.getabetterpic.com/2012/08/apple-displays-for-13-price.html
---
So I was reading through the latest issue of Maximum PC and apparently there are 27" monitors shipping from South Korea that use the same panels Apple's revered displays use, but at about a third the cost. They run the same 2560x1440 resolution, but have cheaper stands and no on screen display. I just recently bought a new 24" monitor, and as soon as I saw these, I thought "Why didn't I know about this sooner?!?" But then my next thought was "What would I do with a 2560x1440 resolution?" Which led to the age-old geek answer, "I don't know, but I still want one."


Fil Maj
PhillyETE 2013 was awesome!
Spoke about this same topic last year.
tl;dr: things are much better
Biggest embarassment as a programmer: regressions
Be disciplined at your craft: write a test for each bug
Run your tests after each change. This will prevent regressions.
Over time you grow a set of tests for your application
CI automates the testing process. You get continuous feedback as your codebase evolves - in real-time
Established testing system is in place: Selenium.
Not so easy.
Open Source and Open Spec FTW
Scripts can be written in a variety of languages, as there are many "client" libraries
JavaScript, Ruby, Java, C, you name it.
http://github.com/appium/appium
npm install -g appium
An implementation of Selenium for mobile
Free and Open Source
Supports Android, iOS and FirefoxOS
Works with browsers, hybrid applications, and native applications
That's right!
The spec is being pushed to address new automation needs
Different types of apps, different types of interactions
Lots of moving parts
Infrastructure is hard: Windows, Mac, Linux, and now mobile...
Let us handle the infrastructure: over 300 OS/browser combos, more being added every week
You treat Sauce Labs like just another Selenium server endpoint
We plan on providing a cloud of real devices accessible to users for test runs


To request a username/password that allows you to build and/or deploy your project's site, please mail Insert Site Administrator Here.
This file is welcome.local.html, please modify to suit your installation


YSFI was built to eradicate the unethical practices and to promote the sports culture amongs youth. Conducting championships at block , district , state , national and international level which helps the youth to connect with the sports world . This will help in boosting the morale of the youth to participate in various international level competitions such as common wealth, Olympics and Asiad and win medals for the country.
Games we conduct:
Kabaddi, circular Kabaddi, Yoga, Athletic, Boxing, Badminton, Hockey, Volleyball, Handball, Football, Cricket, Basketball, Kho-kho, Karate, rugby, taekwondo, tug of war, weight lifting, cycling, archery, cross country race, drop ro-boll, kick boxing, net ball, power lifting, jump rope, wushu, table tennis, shooting, air rifle, pistil, wrestling etc.
-> Along with conducting games we also Spreads social awareness about the bad practices.
-> We also conducts blood camps at regular interval
-> We also conducts physical fitness camps at regular intervals
-> We also spread awareness about the increasing pollution


The following table contains relevant Guidance and Policy that governs software development practices within USACE.
If you are considering any software development project, review the relevant policy before developing any software products.
| Title | Link |
|---|---|
| Enterprise Standard (ES)-08101 Software Validation for the Hydrology, Hydraulics, and Coastal Community of Practice | link |


Social Coffee is a Thrift service used for querying friendships and user's relationships.
It is written in Node.js using Coffeescript and stores data in Redis key-value NoSQL store.
Comes with client libraries written for Python, Ruby and Node. In addition to multiple client libraries
it comes with social-cli - interactive command utility.
Goals
It supports very simple operations and tries to solve very few problems, but it's designed for on-line, low-latency
and high-throughput.
a high rate of query/add/remove operations
potentially complex set arithmentic operations
horizontal scaling
sharding
consistent
Non - goals
multi-hop or graph-walking queries
Operations
The service supports fairly simple operations and it's used to store a symmetrical social graph, where if a user A is a friend with a user B, then symmetrically a user B is a friend with a user A. For each friendship relationship operation there are two rows written into the backing store.
users:1:friends -> [ 2 ]
users:2:friends -> [ 1 ]
Query friends list.
Synopsis:
list<ID> get_friends(1: ID id) throws (1: SocialException ex)
Returns a list of user's friends with provided ID.
Params:
id - The ID of the user for whom the list of the friends should be retrieved.
Return:
The list of user's friends IDs. If user has no friends empty list is returned.
Throws:
SocialException if
ID is null
ID is not a number
ID is a non positive number
internall error occurs, e.g. connection to a database could not be established
Example:
ruby
client.get_friends 1
Create friendship between two users
Synopsis:
bool create_friendship(1: ID usera, 2: ID userb) throws (1: SocialException ex)
Asks the service to make a new multual friendship relationship between users with IDs usera and userb.
It's an idempotent operation so it can be called multiple times.
Params:
usera - The ID of the user A.
userb - The ID of the user B.
Return:
Boolean value indicating whether the operation created a new relationship or relationship already existed. "true" if operation created a new friendship relationship, "false" otherwise.
Throws:
SocialException if
any of IDs is null
any of IDs is not a number
any of IDs is a non positive number
both of IDs are equal
internall error occurs, e.g. connection to a database could not be established
Example:
ruby
client.create_friendship 1, 2
Remove friendship between two users
Synopsis:
bool remove_friendship(1: ID usera, 2: ID userb) throws (1: SocialException ex)
Asks the service to remove a new friendship relationship between users with IDs usera and userb.
It's an idempotent operation so it can be called multiple times.
Params:
usera - The ID of the user A.
userb - The ID of the user B.
Return:
Boolean value indicating whether the operation removed an already existed relationship or operation did nothing. "true" if operation removed an already existed friendship relationship, "false" otherwise.
Throws:
SocialException if
any of IDs is null
any of IDs is not a number
any of IDs is a non positive number
both of IDs are equal
internall error occurs, e.g. connection to a database could not be established
Example:
ruby
client.remove_friendship 1, 2
Installation
Runtime Requirements
To operate properly Social Coffee service requires
Node.js platform
and access to Redis key-value data store
Service Requirements
Installation of server's required packages is as simple as calling
$ npm install
Running
Configuration
All required configuration files are found under config/ directory and use YAML format. For now there is only a single configuration file required called db.yaml.
db.yaml contains a database configuration (here Redis) for every runtime environment (e.g. development, test, production, staging). If redis is installed on a localhost with default configuration creating database configuration file is as simple as calling:
$ cp config/db.yaml.example config/db.yaml
Parameters:
* host, string, required, URL of the host machine where Redis is installed
* port, number, required, the port number of a Redis instance
* password, string, optional, if a Redis instance is password-protected, password required for authentication
Starting the Server
By default the server ships with four enviornments: "development", "test", "staging" and "production".
If no environment is specified the server starts in development environemnt. So calling:
$ node lib/index.js
starts the server bound to host <IP_ADDRESS>, port 9090 and in development environment.
To change an environemnt use NODE_ENV environment variable. E.g. to start the server in production enviornment on port 3000 execute:
$ NODE_ENV=production node lib/index.js -p 3000
Options:
-p, --port, number, default: 9090, the port number
CLI
Social Coffee service is delivered with a command line tool similar redis-cli that works in REPL manner.
social-cli supports tab autocompletion and comes with just two options. The first one specifies a port number
and the second one specifies a host to which thrift client should connect.
ping - utility command used for asking if we still have a connection to a remote server. If the client is connected to
thrift's server it will respond with "pong" string, displayd in a console.
server info - the command asks a remote server for thrift server description.
server counters - the command asks a remote server for performance counters.
server options - the command asks a remote server for server options/configuration.
friends list id - the command queries a remote server for user's friends list. If a user has friends than the list of user's friends IDs is displayed, empty array otherwise.
friendship create id_a id_b - the command asks a remote server to make a new mutual friendship relationship between users with IDs id_a and id_b. The command call displays a message indicating whether or not the operation performed created a new
friendship relationship or relationship already existed and did nothing.
friendship remove id_a id_b - the command asks a remote server to remove a friendship relationship between users with IDs id_a and id_b. The command call displays a message indicating whether or not the operation performed removed existed friendship relationship or did nothing.
quit, exit - the command disconnects thrift's client from remote server and shuts down cli.
Sample session
Below code shows a sample session from interaction with social-cli command line tool.
localhost:9000>info: client connected to remote server
localhost:9000>ping
pong
localhost:9000>friends list 1
[]
localhost:9000>friendship create 1 2
friendship newely created: true
localhost:9000>friends list 1
[ 2 ]
localhost:9000>friendship remove 1 2
friendship just removed: true
localhost:9000>friends list 1
[]
localhost:9000>quit
bye bye...
Clients
The sever except for social-cli command line tool comes with multiple client libraries written for Python, Ruby and Node.js (using Coffeescript).
For more information about how to load test the thrift service using Locust see load testing
Development
Requirements
Globally install Coffeescript compiler
$ [sudo] npm install -g coffeescript
Globally install Cake
$ [sudo] npm install -g cake
If you are going to generate documentation, globally install groc
$ [sudo] npm install -g groc
If you are going to regenerate and change thrift interfaces install Thrift compiler with support for at least Node.js, Ruby and Python. Apache Thrift
Now if all the above requirements are installed execute watch cake task to watch src/ directory for changes and compile *.coffee files into *.js equivalent.
$ cake watch
Cake Tasks
watch - the task used for watching for Coffeescript file changes and recompilation to Javascript.
generate:thrift - the task used for generating thrift bindings for Node.js, Python, Ruby and human-readable HTML documentation generation from thrift interfaces stored under thrift/ directory.
E.g. to regenerate thrift bindings simply call:
$ cake generate:thrift
Provisioning
For more information about how to provision the service using Ansible see provision
Documentation
The documentation generated from the source code can be found under doc/ directory, whereas the documentation generated from the thrift interfaces is located under doc/thrift/ directory.
What's missing
Server Clustering
Redis Automatic failover with sentinel
Database model support for replication with master/multiple slaves
Multiple Redis instances sharding
Distributed transactions support with Two-phase Commit Protocol. Instead of writing a coordinator to handle distributed transactions we might choose to use e.g. Hyperdex data store which supports distirbuted transactions with it's own WARP protocol.
Contributing
Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Social Coffee
Social Coffee is a Thrift service used for querying friendships and user's relationships. It is written in Node.js using Coffeescript and stores data in Redis key-value NoSQL store. Comes with client libraries written for Python, Ruby and Node. In addition to multiple client libraries it comes with
social-cli
- interactive command utility.Goals
It supports very simple operations and tries to solve very few problems, but it's designed for on-line, low-latency and high-throughput.
Non - goals
Operations
The service supports fairly simple operations and it's used to store a symmetrical social graph, where if a user A is a friend with a user B, then symmetrically a user B is a friend with a user A. For each friendship relationship operation there are two rows written into the backing store.
Query friends list.
Synopsis:
list<ID> get_friends(1: ID id) throws (1: SocialException ex)
Returns a list of user's friends with provided ID.
Params:
id
- The ID of the user for whom the list of the friends should be retrieved.Return:
Throws:
SocialException
ifExample:
ruby client.get_friends 1
Create friendship between two users
Synopsis:
bool create_friendship(1: ID usera, 2: ID userb) throws (1: SocialException ex)
Asks the service to make a new multual friendship relationship between users with IDs usera and userb. It's an idempotent operation so it can be called multiple times.
Params:
usera
- The ID of the user A.userb
- The ID of the user B.Return:
Throws:
SocialException
ifExample:
ruby client.create_friendship 1, 2
Remove friendship between two users
Synopsis:
bool remove_friendship(1: ID usera, 2: ID userb) throws (1: SocialException ex)
Asks the service to remove a new friendship relationship between users with IDs usera and userb. It's an idempotent operation so it can be called multiple times.
Params:
usera
- The ID of the user A.userb
- The ID of the user B.Return:
Throws:
SocialException
ifExample:
ruby client.remove_friendship 1, 2
Installation
Runtime Requirements
To operate properly Social Coffee service requires
Node.js
platformRedis
key-value data storeService Requirements
Installation of server's required packages is as simple as calling
Running
Configuration
All required configuration files are found under
config/
directory and use YAML format. For now there is only a single configuration file required calleddb.yaml
.db.yaml
contains a database configuration (here Redis) for every runtime environment (e.g. development, test, production, staging). If redis is installed on alocalhost
with default configuration creating database configuration file is as simple as calling:Parameters: *
host
, string, required, URL of the host machine where Redis is installed *port
, number, required, the port number of a Redis instance *password
, string, optional, if a Redis instance is password-protected, password required for authenticationStarting the Server
By default the server ships with four enviornments: "development", "test", "staging" and "production". If no environment is specified the server starts in development environemnt. So calling:
starts the server bound to host
<IP_ADDRESS>
, port9090
and indevelopment
environment. To change an environemnt useNODE_ENV
environment variable. E.g. to start the server inproduction
enviornment on port3000
execute:Options:
-p
,--port
,number
, default:9090
, the port numberCLI
Social Coffee service is delivered with a command line tool similar
redis-cli
that works in REPL manner.social-cli
supports tab autocompletion and comes with just two options. The first one specifies a port number and the second one specifies a host to which thrift client should connect.Options
-p
,--port
,number
, default:9090
, port number-h
,--hort
,string
, default:localhost
, host addressCommand list
ping
- utility command used for asking if we still have a connection to a remote server. If the client is connected to thrift's server it will respond with"pong"
string, displayd in a console.server info
- the command asks a remote server for thrift server description.server counters
- the command asks a remote server for performance counters.server options
- the command asks a remote server for server options/configuration.friends list id
- the command queries a remote server for user's friends list. If a user has friends than the list of user's friends IDs is displayed, empty array otherwise.friendship create id_a id_b
- the command asks a remote server to make a new mutual friendship relationship between users with IDsid_a
andid_b
. The command call displays a message indicating whether or not the operation performed created a new friendship relationship or relationship already existed and did nothing.friendship remove id_a id_b
- the command asks a remote server to remove a friendship relationship between users with IDsid_a
andid_b
. The command call displays a message indicating whether or not the operation performed removed existed friendship relationship or did nothing.quit
,exit
- the command disconnects thrift's client from remote server and shuts down cli.Sample session
Below code shows a sample session from interaction with
social-cli
command line tool.Clients
The sever except for
social-cli
command line tool comes with multiple client libraries written for Python, Ruby and Node.js (using Coffeescript).Ruby
See the offical Social Coffee Ruby client documentation
Python
See the offical Social Coffee Python client documentation
Node.js
It is not exposed as a package but instead used internally by the
social-cli
command line tool.Testing
Unit Testing
To run unit tests execute:
Load Testing
For more information about how to load test the thrift service using Locust see load testing
Development
Requirements
Globally install Coffeescript compiler
Globally install Cake
If you are going to generate documentation, globally install groc
If you are going to regenerate and change thrift interfaces install Thrift compiler with support for at least Node.js, Ruby and Python. Apache Thrift
Now if all the above requirements are installed execute
watch
cake task to watchsrc/
directory for changes and compile*.coffee
files into*.js
equivalent.Cake Tasks
watch
- the task used for watching for Coffeescript file changes and recompilation to Javascript.generate:thrift
- the task used for generating thrift bindings for Node.js, Python, Ruby and human-readable HTML documentation generation from thrift interfaces stored underthrift/
directory.E.g. to regenerate thrift bindings simply call:
Provisioning
For more information about how to provision the service using Ansible see provision
Documentation
The documentation generated from the source code can be found under
doc/
directory, whereas the documentation generated from the thrift interfaces is located underdoc/thrift/
directory.What's missing
Contributing
git checkout -b my-new-feature
)git commit -am 'Add some feature'
)git push origin my-new-feature
)


[§460J-10] Form for licenses. The form of every license shall be prescribed by the board and shall be issued in the name of the board. [L 1972, c 134, pt of §1]


|
Steam Audio API
2.0-beta.18
|
The format of an audio buffer. More...
Data Fields | |
| IPLChannelLayoutType | channelLayoutType |
| Indicates whether or not the audio should be interpreted as Ambisonics data. More... | |
| IPLChannelLayout | channelLayout |
| Specifies the speaker configuration used for multi-channel, speaker-based audio data. More... | |
| IPLint32 | numSpeakers |
| The number of channels in the audio data. More... | |
| IPLVector3 * | speakerDirections |
An array of IPLVector3 objects indicating the direction of each speaker relative to the user. More... | |
| IPLint32 | ambisonicsOrder |
| The order of Ambisonics to use. More... | |
| IPLAmbisonicsOrdering | ambisonicsOrdering |
| The ordering of Ambisonics channels within the data. More... | |
| IPLAmbisonicsNormalization | ambisonicsNormalization |
| The normalization scheme used for Ambisonics data. More... | |
| IPLChannelOrder | channelOrder |
| Whether the audio data is interleaved or deinterleaved. More... | |
The format of an audio buffer.
Whenever you pass audio data to or from Phonon, you must describe the format in which the audio is encoded. Phonon only supports uncompressed PCM wave data, stored in 32-bit floating point format. However, Phonon supports many different multi-channel and Ambisonics formats, and the IPLAudioFormat
tells Phonon how to interpret a buffer of audio data.
| IPLChannelLayoutType channelLayoutType |
Indicates whether or not the audio should be interpreted as Ambisonics data.
| IPLChannelLayout channelLayout |
Specifies the speaker configuration used for multi-channel, speaker-based audio data.
Ignored if channelLayoutType
is IPL_CHANNELLAYOUTTYPE_AMBISONICS
.
| IPLint32 numSpeakers |
The number of channels in the audio data.
Only used if channelLayoutType
is IPL_CHANNELLAYOUTTYPE_SPEAKERS
and channelLayout
is IPL_CHANNELLAYOUT_CUSTOM
.
| IPLVector3* speakerDirections |
An array of IPLVector3
objects indicating the direction of each speaker relative to the user.
Can be NULL
. Only used if channelLayoutType
is IPL_CHANNELLAYOUTTYPE_SPEAKERS
and channelLayout
is IPL_CHANNELLAYOUT_CUSTOM
.
| IPLint32 ambisonicsOrder |
The order of Ambisonics to use.
Must be between 0 and 3. Ignored if channelLayoutType
is IPL_CHANNELLAYOUTTYPE_SPEAKERS
.
| IPLAmbisonicsOrdering ambisonicsOrdering |
The ordering of Ambisonics channels within the data.
Ignored if channelLayoutType
is IPL_CHANNELLAYOUTTYPE_SPEAKERS
.
| IPLAmbisonicsNormalization ambisonicsNormalization |
The normalization scheme used for Ambisonics data.
Ignored if channelLayoutType
is IPL_CHANNELLAYOUTTYPE_SPEAKERS
.
| IPLChannelOrder channelOrder |
Whether the audio data is interleaved or deinterleaved.


This page shows an ideal first digit distribution according to Benford's Law, and the first digit distribution of simulated voting in Georgia counties, based on the number of registered voters actually in each country, and a user specified voter turnout and percent vote for a particular candidate.
You can switch between showing the reference Benford distribution and the simulated distribution using the two buttons directly under the distribution display.
To use this most effectively, first look at the ideal reference distribution. Then look at the simulation. Note how they differ.
Then try changing voter turnout or the percentage the candidate receives. As you change these values using the up/down arrows, the distribution will update.
Note how even small changes in turnout or the candidate's percentage can cause big changes in the distribution. The reason for this is that the underlying county populations (and the corresponding number of registerered voters in each) does not follow Benford's Law.
If you want to see that distribution, crank the voter turnout and candidate percentage both up to 100.
A more realistic simulation would vary the turnout and the candidate's percentage by county. In the 2020 US election, for example, Trump got higher percentages in smaller population counties and Biden got higher percentages in larger population counties. Adding those refinements would not improve the conformance to Benford's Law. It would just change to giving a different set of non-Benford results than the simplified simulation gives.


--- title: Loss keywords: fastai sidebar: home_sidebar summary: "Train and evaluate your algorithms on real data. You can also save the model for later use, or deploy it to production!" description: "Train and evaluate your algorithms on real data. You can also save the model for later use, or deploy it to production!" nb_path: "02_loss.ipynb" ---
input: clean and tidy dataset from data notebook + ML model class from hypotheses space notebook
output: evaluated, trained and (optionally) deployed model
description:
In this notebook you train and evaluate ML methods implemented with the whole dataset. You can also save the model for later use, or deploy it to production environment, or use this notebook as the final output.
Edit this and the other text cells to describe your project.
import numpy as np
# your code here
seed = 0
make direct derivations from the parameters:
np.random.seed(seed)
# your code here
Note that depending on the file format and your variables, you might have to refefine datatypes in your dataframe!
You can also include statistical tests!


One taste of a Vita Bella pizza will have you sighing, closing your eyes, and reflecting on the beauty of life. We strive to create the best-tasting, freshest, highest quality pizzas around. With our wide range of pizza types, from thin crust to stuffed to our very own innovation, the double dough pizza; extensive ingredient list; and ten different specialty creations, there is a Vita Bella pizza that will ignite the taste buds of any pizza connoisseur. And aren't we all pizza connoisseurs? If you're not in the mood for pizza, Vita Bella offers plenty of other delicious alternatives that will satisfy your appetite...whether that is carry-out or delivery... Enjoy!


The term “autonomous things” is being used more and more in the technology world to talk about phenomena powered by the latest advancements in artificial intelligence and machine learning. Autonomous things are things that work autonomously without human guidance or direct intervention
The emergence of autonomous things marks a key landmark in technological progress. Early examples include autonomous drones and self-driving vehicles. Expect to see more autonomous things as these kinds of technologies develop further.Autonomous things are fundamentally important because they represent the first real untethering of machines from explicit human guidance. Humans are used to programming things, but are not used to them acting in autonomous ways. Self-driving vehicles are still making their way onto the roads. While widespread adoption of autonomous things has yet to occur, there are indications that it is coming soon.


Send GET or POST request to the test resource.
GET /examples/app/some?id=1
or
id:
POST /example/app/some


The following exercises will help you explore how to create custom Angular.js directives. The exercises will explore the following concepts:
For each exercise a new HTML file will need to be created. This can be done one of two ways. First, a new HTML file can be created with a script reference to Angular.js in the content of the HEAD element and the following code added to the content of the BODY element.

The exercises will use the above code as their starting structure. The second way to create a new file is to simply copy the file from a previous exercise and remove the code from the previous exercise, thereby, resetting it the original code as shown above.
If you are unsure how to add a script reference to the top of an HTML file in the content of the HEAD section, please ask the instructor.
Step 1. Using the instructions in the Exercise Setup section, create a new HTML file named custom-dir-restrict.html .
Step 2. Using HTML markup, create a new DIV element as a child element of the Ctrl DIV . Add a class attribute to the DIV element, then add a class named restrict-exercise .
Step 3. Using JavaScript code, register a new directive for the class added in the previous step.
Step 4. In the directive registration function, return a directive definition object. Configure the link function to simply replace the element’s content with the value It worked! . Hint , remember the element passed into the link function is a jQuery object with an html function.
Step 5. Configure the restrict option to limit the marker of the directive to a class instead of an element or attribute.
Step 6. Using the HTTP protocol and the local Node.js web server, navigate to the HTML file with a web browser. Are the DOM changes specified by the directive applied to web page?
Step 7.
Reconfigure the
restrict
option to limit the marker of the directive to an element but do not change the HTML. Reload the web page. Did the output of the web page change?
Step 8.
In the HTML markup, reapply the directive marker as an element. Reload the web page. Did the output of the web page change?
Step 1. Using the instructions in the Exercise Setup section, create a new HTML file named custom-dir-template.html .
Step 2. Using HTML markup, create a new DIV element as a child element of the Ctrl DIV . Add an attribute to the DIV element named template-exercise . Within the DIV element, add the following content.
{{originalMessage}}
Step 3. Using JavaScript code, register a new directive for the attribute created in the previous step.
Step 4. In the directive registration function, return the following directive definition object.
{
link: function (scope, element, attrs) {
scope.originalMessage = "Original Content";
scope.newMessage = "New Content";
}
}
Step 5. Using the HTTP protocol and the local Node.js web server, navigate to the HTML file with a web browser. What does the output of the web page look like? You will see Original Content displayed in the web browser.
Step 6. Modify the directive definition object by adding a template option to it. Configure the template option to use the following inline template.
{{newMessage}}
Step 7. Reload the web page, what does the web page look like now? What changed and why?
Step 8. Copy the inline template content to an external file named template.html . Save the template file to the same folder as the web page. Change the template option to load the template from an external file. Hint , you will need to change the name of the option itself as well.
Step 8. Reload the web page, what does the web page look like now? What changed and why?
Step 1. Using the instructions in the Exercise Setup section, create a new HTML file named custom-dir-transclude.html .
Step 2. Using HTML markup, create a new DIV element as a child element of the Ctrl DIV . Add an attribute to the DIV element named transclude-exercise . Within the DIV element, add the following content.
{{originalMessage}}
Step 3. Using JavaScript code, register a new directive for the attribute created in the previous step.
Step 4. In the directive registration function, return the following directive definition object.
{
template: "{{newMessage}}",
link: function (scope, element, attrs) {
scope.originalMessage = "Original Content";
scope.newMessage = "New Content";
}
}
Step 5. Using the HTTP protocol and the local Node.js web server, navigate to the HTML file with a web browser. What does the output of the web page look like? Observe how the message Original Content has been replaced with the template content.
Step 6. To retrieve and use the original content, the original content must be transcluded. This can be accomplish using either the ngTransclude directive or the transclude function available in the link function. Add a DIV element, with the ngTransclude directive applied, to the template.
Step 7. Reload the web page, what does the web page look like now? What changed and why? The original content will now appear in the content of the DIV element you added to the template.
Step 8. Remove the DIV and ngTransclude directive from the template. Modify the link function to add a named parameter for the transclude function. Name the parameter transclude .
Step 9. Call the transclude function, and pass in a callback function to add the cloned transcluded content as a child of the DIV element on which the transcludeExercise directive is applied.
Step 10. Reload the web page, what does the web page look like now? What changed and why?
Challenge: Transclude the content many times, adding it to the DOM each time. What is the output and why?
Step 1. Using the instructions in the Exercise Setup section, create a new HTML file named custom-dir-compile.html .
Step 2. Using HTML markup, create a new DIV element as a child element of the Ctrl DIV . Add an attribute to the DIV element named compile-exercise .
Step 3. Using JavaScript code, register a new directive for the attribute created in the previous step.
Step 4. In the directive registration function, return the following directive definition object.
{
link: function (scope, element, attrs) {
var tpl = "{{message}}";
scope.message = "It worked!";
element.html(tpl);
}
}
Step 5. Using the HTTP protocol and the local Node.js web server, navigate to the HTML file with a web browser. What does the output of the web page look like? Observe how the message template variable has not been replaced with the scope value. Why did this happen?
Step 6. Using the compile service, compile the value of the tpl variable to produce a linking function.
Step 7. Pass the scope into the linking function, then add the resulting DOM element to the DOM.
Step 8. Reload the web page, what does the web page look like now? What changed and why?
Step 1. Using the instructions in the Exercise Setup section, create a new HTML file named custom-dir-isolated.html .
Step 2. Add the following HTML to the content area of the Ctrl DIV .
Current Value: {{currentValue}}
<button simple-click="increment()">
Increment
</button>
Step 3. Using JavaScript code, register the simpleClick directive.
Step 4. Configure the simpleClick directive to use an isolated scope . Allow a function call to be assigned to the directive’s attribute marker. The name of the scope property to which the function is assigned is named clickFn .
Step 5. Add a link function to the simpleClick directive, then add the following code to the link function.
element.on("click", function(e) {
scope.$apply(function() {
scope.clickFn(e);
});
});
Step 6. Initialize the Ctrl scope by adding the following code to the Ctrl controller function.
$scope.currentValue = 0;
$scope.increment = function() {
$scope.currentValue++;
};
Step 7. Using the HTTP protocol and the local Node.js web server, navigate to the HTML file with a web browser. What does the output of the web page look like? Click the button and observe how the current value incremented. Why did this happen?
Step 8. In the on click event handler, remove the call to apply . Reload the page, then click the button. Is the current value increase displayed in the UI? Why is the updated current value not displayed in the UI? What is the role of the apply function?
Step 1. Using the instructions in the Exercise Setup section, create a new HTML file named custom-dir-require.html .
Step 2. Add the following HTML to the content area of the Ctrl DIV .

<form name="contactForm">
<input ng-model="person.firstName" name="personFirstName" simple-required>
</form>
Step 3. Using JavaScript code, register the simpleRequired directive.
Step 4. In the simpleRequired directive registration function, return the following directive definition object.
{
// To Do 1. add require option here
link: function(scope, element, attrs, ctrl) {
function validate(value) {
var isValid = value != null && String(value).length > 0;
// To Do 2. add code to set validity here
return value;
}
// To Do 3. add code to update format and parse arrays here
}
}
Review the code, and fill in the code lines where there are To Do comments. If you are not familiar with ngModel’s controller properties, please ask the instructor for help.
Step 5. Initialize the Ctrl scope by adding the following code to the Ctrl controller function.
$scope.person = {
firstName: "Bob"
};
Step 6. Using the HTTP protocol and the local Node.js web server, navigate to the HTML file with a web browser. What does the output of the web page look like? Delete the content of the input element. What happened? Why did this happen? Type new content into the input element. What happened and why? Use the browser’s DOM inspector to observe the addition and removal of classes from the input element.
Step 1. Using the instructions in the Exercise Setup section, create a new HTML file named custom-dir-terminal.html .
Step 2. Using HTML markup, create a new DIV element as a child element of the Ctrl DIV . Add two attributes named simple-bold and simple-repeat . Assign the value of 5 to the simple-repeat attribute. In the content area of the DIV element, add the following template variable.
{{message}}
Step 3. Create a property named message on the Ctrl scope object. Assign the value Hello! to the message property.
Step 4. Using JavaScript code, register two new directives for the attributes created in the previous step.
Step 5. In the simpleBold directive registration function, return the following directive definition object.
{
priority:50,
link: function(scope, element) {
console.log("simpleBold Link");
element.css("font-weight", "bold");
}
}
Step 6. In the simpleRepeat directive registration function, return a directive definition object with its priority set to 100 and the terminal option set to true. Use the compile option to specify a compile function with two named parameters: tElement and tAttrs . From the compile function, return a link function with one named parameter scope .
Step 7. In the compile function, declare four variables named: that , count , tpl and parentElement . Assign the reference of this to the that variable. Parse the integer from the simple-repeat attribute value, then assign it to the count variable. Assign the outer HTML value of tElement’s first DOM element to the tpl variable. Assign the reference of tElement’s parent element to the parentElement variable.
Step 8. Remove all of parentElement’s child elements.
Step 9. In the linking function, use the compile service to compile the HTML value in the tpl variable. Only compile directives on the root element of the HTML whose priority is less than simpleRepeat’s priority. Finally, call the returned linking function, passing in a new child scope, then add the returned DOM element as a child element to the parentElement .
Step 10. Wrap the compile/linking code in the previous step in a loop structure so the simpleRepeat’s DOM element and its content are repeated the number of times specified in the count variable.
Step 11. Using the HTTP protocol and the local Node.js web server, navigate to the HTML file with a web browser. What does the output of the web page look like? How many items are bolded? Observe the console, how many times is the text simpleBold link outputted. Why did this happen?
Step 12. Change the priority of the simpleBold directive from 50 to 500. Reload the web page. How many items are bolded now? Why did this happen? Observe the console, how many times is the text simpleBold link outputted.
Step 1. Using the instructions in the Exercise Setup section, create a new HTML file named custom-dir-observe.html .
Step 2. Add the following HTML to the content area of the Ctrl DIV .
Current Value: {{currentValue}}

Step 3. Using JavaScript code, register the observeExercise directive.
Step 4. From the observeExercise directive registration, return the following directive definition object.
{
template: "Observe Value: {{observeValue}}",
link: function(scope, element, attrs) {
}
}
Step 5. In the link function, setup an observe to observe the observe-exercise attribute to update the observeValue property on the scope.
Step 6. Initialize the Ctrl scope by adding the following code to the Ctrl controller function. If you are not familiar with JavaScript promises or how promises are used with the interval and timeout services, ask the instructor for further information.
$scope.currentValue = 0;
var intervalPromise = $interval(function() {
$scope.currentValue++;
}, 500);
$timeout(function() {
$interval.cancel(intervalPromise);
}, 5000);
The interval service will increment current value approximately every 500 milliseconds. The interval will continue until being canceled by the callback function passed into the $timeout service approximately 5 seconds later.
Step 7. Using the HTTP protocol and the local Node.js web server, navigate to the HTML file with a web browser. What does the output of the web page look like? Why does the observe value increment? How are watches and observes different? How are they similar?


Rust cares a great deal about what values are modified. Values fall into two types:
Mutable values are always denoted with a mut keyword in some manner
We will have a lot more to say on this concept, but for now just keep an eye out for this keyword for what things can be modified


Uncompiled Lib + Uncompiled App
|
Compiled Lib + Uncompiled App
|
(Lib+App) Compiled Together
http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/BloomfieldHillsMichigan/Parcels/MapServer
http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/BloomfieldHillsMichigan/LandusePlanning/MapServer
http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/TaxParcel/AssessorsBasemap/MapServer
Load


Python (index)
Python (11) - Numerical computing (scipy)
OUTLOOK
Traps
SciPy - start
SciPy - integration
Ordinary Differential Equations (ODE)
Direction fields
SciPy - ODE
Partial Differential Equations (PDE)
Numerical differentiation
1D heat equation
2D heat equation
1D wave equation
Homework
Python (index)


Please do not confuse toad-pills—those “tiny pink miracles of batrachian well-being” as Dobson called them in his engaging pamphlet How I Counted All The Toads In Scandinavi (out of print)—with other sorts of pills, not least those of Lockyer, whose tomb in Southwark Cathedral commemorates his genius:
Here Lockyer lies interr'd, enough : his name
Speaks one hath few competitors in fame ;
A Name soe Great soe Generall'e may scorne
Inscriptions wh doe vulgar tombs adorne :
A diminution to write in verse
His eulogies wh most men's mouths rehearse.
His virtues and his PILLS are so well known,
That envy can't confine them under stone.
But they'll survive his dust and not expire
Till all things else at th'universall fire.
This verse is lost, his PILL Embalmes him safe
To future times without an Epitaph :Repair'd Octobr 1741
Deceast Aprill ye 26th Anno Do : 1672 Aged 72


Film Adaptations
Coelho said he has been reluctant in selling rights to his books. He believed that a book has a “life of its own inside the reader’s mind”, and seldom did he find an adaptation that lived up to the book. Despite this, with time, Coelho decided to open up the possibility.
In 2003, Warner Bros. bought the rights to the film adaptation of The Alchemist. The project stalled and the movie never materialized, reportedly because of problems with the script. At one point, the script had a battle sequence with 10,000 soldiers, which was “not what the book is about”. Reportedly, Coelho offered US$2 million to Warner Bros. to buy back the film rights to The Alchemist.
During the 2008 Cannes Film Festival, Harvey Weinstein announced that he had bought the rights to the film and will serve as its producer. Laurence Fishburne is set to direct, and to play the eponymous character. It will have a reported budget of $60 million. Weinstein, who rarely personally produces movies, stated that “My loyalty is not to Laurence, my loyalty is not to me, my loyalty is not to anyone other than Paulo Coelho.”Coelho added “I am very happy that my book will be filmed in the way I intended it to be and I hope the spirit and simplicity of my work will be preserved. I am excited my friend Laurence Fishburne and Harvey Weinstein will be working together.”
Other Media
HarperOne, a HarperCollins imprint, produced an illustrated version of the novel, with paintings by the French artist Moebius, but failed to convince Coelho “to consent to the full graphic-novel treatment”. In June 2010, HarperOne announced that it would publish a graphic-novel adaptation. The Alchemist: A Graphic Novel was published in 2010, adapted by Derek Ruiz and artwork by Daniel Sampere.
A theatrical adaptation of The Alchemist was produced and performed by the Cornish Collective, which is their most successful production to date. It was staged for the first time in India by Ashvin Gidwani Productions. Kajol and Karan Johar launched this book’s theatrical adaptation in India.
In music, The Alchemist has inspired numerous bands of the same name. In September 2009, an orchestral performance was conducted at the Ansche Chesed Synagogue on the Upper West Side. Inspired by The Alchemist, “an orchestral performance” was composed by One World Symphony for composer and conductor Sung Jin Hong’ wedding.


Example: Placing people on a photo
More...
List of all members.
Detailed Description
Example: Placing people on a photo
A group of people wants to take a group photo. Each person can give preferences next to whom he or she wants to be placed on the photo. The problem to be solved is to find a placement that violates as few preferences as possible.
Definition at line 77 of file photo.cpp.
Member Enumeration Documentation
Branching to use for model.
- Enumerator:
| BRANCH_NONE |
Choose variables from left to right.
|
| BRANCH_DEGREE |
Choose variable with largest degree.
|
| BRANCH_AFC_SIZE |
Choose variable with largest afc over size.
|
Definition at line 91 of file photo.cpp.
Constructor & Destructor Documentation
| Photo::Photo |
( |
Photo & |
s |
) |
[inline] |
Constructor for cloning s.
Definition at line 143 of file photo.cpp.
Member Function Documentation
| bool Photo::slave |
( |
const MetaInfo & |
mi |
) |
[inline] |
Slave function for restarts.
Definition at line 132 of file photo.cpp.
| virtual Space* Photo::copy |
( |
void |
|
) |
[inline, virtual] |
Copy during cloning.
Definition at line 150 of file photo.cpp.
| virtual void Photo::print |
( |
std::ostream & |
os |
) |
const [inline, virtual] |
| virtual IntVar Photo::cost |
( |
void |
|
) |
const [inline, virtual] |
Return solution cost.
Definition at line 160 of file photo.cpp.
Member Data Documentation
Person's position on photo.
Definition at line 82 of file photo.cpp.
Number of violated preferences.
Definition at line 84 of file photo.cpp.
Random number generator for LNS.
Definition at line 86 of file photo.cpp.
Relaxation probability.
Definition at line 88 of file photo.cpp.
The documentation for this class was generated from the following file:


{{ $urlPre := "https://api.covid19api.com/" }} {{ $summaryPath := "summary" }} {{ $summary := getJSON $urlPre $summaryPath }} {{ $countriesData := $summary.Countries }}
| Total Confirmed | |
| New Confirmed | |
| Total Recovered | |
| New Recovered | |
| Total Deaths | |
| New Deaths |


Galvanize Delivers
Order Delivery
Menu
Royale With Cheese
$8.99
Add To Order
Arugula Pie
$11.99
Add To Order
Smoked Swine
$14.99
Add To Order
Ice Cream Biscut
$7.99
Add To Order
Order
Item
Price
Subtotal
Tax
Total
account_circle
Name
phone
Phone Number
location_city
Address
PLACE ORDER


[Source - Carolyn Hamilton for FHYA, 2020: The Depot hosted by the FHYA contains a wide range of resources relevant to the period and region covered by the FHYA.
It comprises published and unpublished material in a variety of media about the repositories, collections, and individual archival items on the FHYA. It includes resources that make use of the archival items and that deal with comparative materials. The components of The Depot have been uploaded by the FHYA as well as by registered users of the site who may be representatives of institutions, professional researchers or members of the public. Registered users may not upload any material for which they do not own the copyright or which is not yet out of copyright. Registered users may upload items conventionally regarded as primary materials, such as recordings of interviews, photographs or digital copies of original documents provided that they have the necessary permissions.
The Depot thus holds both items conventionally regarded as secondary materials and as primary materials. The Depot does not deploy this distinction in how it organises the materials, treating both types as archival items produced at a particular place and time. The FHYA deliberately positions The Depot as a curation alongside other curations to underscore this point.
Items uploaded by the FHYA to The Depot are curated by the FHYA in that the FHYA makes decisions about what to upload and adds descriptive metadata. Registered users make decisions about what they wish to upload and are encouraged to provide as much detail as possible in the metadata section of their upload, as the more information and detail, the more useful the resource is likely to be.
Items uploaded by registered users of the site are not subjected to further curation by the FHYA. The order of all of the material in The Depot, as presented on EMANDULO is random. Users can use the search function to look for specific resources or to look for specific terms.
Certain of the uploaded items date back to the nineteenth century or earlier, and users of the site are alerted to the fact that some make use of terminology and naming conventions that are not acceptable in the twenty-first century.
Contributions


Overview
The following is an implementation for creating an expanding TableView cell effect by insertion and deletion of cells.
There’s many ways to create the appearance of expanding TableView cells, most obviously by increasing the cell’s height to expose overflow contents of the cell. After checking out other methods I decided to go with cell-insertion for my implementation for several reasons:
-
The cell ‘expansion’ has a different appearance to the default cell.
-
Its easier to insert a cell than to stretch an existing cell while maintaining the desired layout constraints.
-
The Expanded cell can be designed separately from the default cell, and dynamically added as an expansion to any cell in the TableView.
-
This method doesn’t explicitly define the state of the cell as ‘expanded’ or ‘contracted’. Little/no additional data needs to be stored for the expanded cells.
If you’re implementing this in an existing project, skip the first section.
If you’d like to go straight to the finished project, click here.
Setting Up
Open up xCode and create a new Xcode Project. On the project template window, select ‘Single View Application’ and click Next.
On the project options screen, fill out the ‘Product Name’, ‘Organisation Name’, and ‘Organisation Identifier’ shown below:
When the project has been created, open the Main.storyboard file from the Project Navigator. You will be presented with a single blank ViewController.
Delete it and drag a new TableViewController into the storyboard from the Object Library.
Select the newly created TableViewController from the hierarchy. In the Attributes Inspector, under the ‘View Controller’ category check the ‘Is Initial View Controller’ box.
Select the TableView inside the TableViewController from the hierarchy. In the attributes inspector under the ‘TableView’ category increase the ‘Prototype Cells’ property to 2. This will allow us to design the default cell and the expansion cell within the the same TableView.
Drag 3 new Swift files from the File Template Library into the project folder.
Name the 3 files ‘DefaultCell.swift’, ‘ExpansionCell.swift’ and ‘ExpandingTVC.swift’ as follows:
Open the DefaultCell.swift file and enter the following:
import Foundation
import UIKit
class DefaultCell : UITableViewCell {
}
Next, open the ExpansionCell.swift file and enter:
import Foundation
import UIKit
class ExpansionCell : UITableViewCell {
}
Finally, in the ExpandingTVC.swift file, enter:
import Foundation
import UIKit
class ExpandingTVC : UITableViewController {
}
This will allow us to link the classes to the views in the storyboard. We’ll write the full implementation for these later.
Open up the Main.storyboard again and select the first cell in the TableView. In the Identity Inspector, change the custom class to ‘DefaultCell’:
Do the same for the second cell:
And for the TableViewController:
Select the Default cell again and change the cell height to 142:
On the attributes inspector, change the Identifier name to ‘DefaultCell’, and change the background color to black (this will make it easier to see the white text).
Do the same for the ExpansionCell, setting its Identifier name to ‘ExpansionCell’. Leave the background color of this cell white.
Creating the Table Cells
Drag two Text Labels onto the DefaultCell and arrange them roughly as follows:
The ‘San Francisco’ label is white, with size 40 and style ‘light’. The ‘£425’ label is white, with size 27 and style ‘Black’.
Open the Assistant Editor to view the code next to the storyboard.
If the class in the AssistantEditor is not the DefaultCell class, you may need to select it manually, like this:
Select the San Francisco Text Label. Holding CTRL, click-and-drag from the Text Label to the class inside the assistant editor. In the popup dialog, set the name of the outlet to ‘DestinationLabel’.
Do the same for the ‘£425’ label, naming the outlet to ‘PriceLabel’. Your DefaultCell.swift file should now look like this:
class DefaultCell : UITableViewCell {
@IBOutlet weak var DestinationLabel: UILabel!
@IBOutlet weak var PriceLabel: UILabel!
}
Moving on to the ExpansionCell, drag a new ImageView component from the object library and position it inside the ExpansionCell.
On the ImageView attributes change the image to the flight-icon imported earlier.
Add two Labels to the ExpansionCell with size 32, positioned approximately like this:
Now things are starting to take shape!
Again we need to link the two labels ‘MAN’ and ‘CFO’ to the corresponding class. Select the ExpansionCell from the hierarchy and open the Assistant Editor. Make sure that the ExpansionCell class is open. As with the DefaultCell, hold CTRL and click-and-drag from the label in the storyboard to the class file. The outlet for label ‘MAN’ is StartLabel, and the outlet for label ‘CFO’ is EndLabel. Your ExpansionCell
class should now look like this:
class ExpansionCell : UITableViewCell {
@IBOutlet weak var StartLabel: UILabel!
@IBOutlet weak var EndLabel: UILabel!
}
Defining the Data
Next, we need to lay a bit of ground-work for our data. We need to store information for each destination shown in the TableView
. Each destination needs a:
- Name
- Price
- Image Name
- List of Flights
Each flight in the list needs a start point and an end point. To set this up, create a new Swift file in the project called DestinationData.swift. Insert the following code into the file:
import Foundation
public class DestinationData {
public var name: String
public var price: String
public var imageName: String
public var flights: [FlightData]?
init(name: String, price: String, imageName: String, flights: [FlightData]?) {
self.name = name
self.price = price
self.imageName = imageName
self.flights = flights
}
}
public class FlightData {
public var start: String
public var end: String
init(start: String, end: String) {
self.start = start
self.end = end
}
}
As a brief explanation of whats happening here, each destination is stored in an instance of the DestinationData
class. Each flight, represented by the ExpansionCell, is stored in the flightData
class. Each destination stores multiple flights in an array. The array of flights is optional, denoted by the ?. This is to demonstrate the case where some cells will not expand (as they have no flights available).
Now we can move on to setting up the TableViewController
.
Setting up the Table
Open the ExpandingTVC
class and create the following function for generating some destination data:
private func getData() -> [DestinationData?] {
var data: [DestinationData?] = []
let sanFranciscoFlights = [FlightData(start: "MAN", end: "CFO")]
let sanFrancisco = DestinationData(name: "San Francisco", price: "£425", imageName: "san_francisco-banner", flights: sanFranciscoFlights)
let londonFlights = [FlightData(start: "MAN", end: "LHR"), FlightData(start: "MAN", end: "LCY")]
let london = DestinationData(name: "London", price: "£500", imageName: "london-banner", flights: londonFlights)
let newYork = DestinationData(name: "New York", price: "630", imageName: "new_york-banner", flights: nil)
return [sanFrancisco, london, newYork]
}
Here we create 3 destinations: San Francisco, London and New York. San Francisco has 1 flight, London has 2, and New York has 0, and so will not expand.
Before the newly-created getData()
function, add a variable DestinationData
and override the viewDidLoad
function, as follows:
var destinationData: [DestinationData?]?
override func viewDidLoad() {
destinationData = getData()
tableView.rowHeight = UITableViewAutomaticDimension;
}
This will store the destinationData
in the TableViewController
and allow the TableView
rows to automatically set their height. Note that both the destinationData
array, and the contents of the array are optional. This is to allow us to insert nil
values into the array, to represent the location of expanded cells in the TableView.
Next, override the tableView
function for specifying the number of rows, as shown below:
/* Number of Rows */
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if let data = destinationData {
return data.count
} else {
return 0
}
}
Displaying Cells
To tell the TableView
which cell to use, and to populate it with data, we next override the following function:
/* Create Cells */
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
}
To track where we put expanded cells in the TableView
, we’re going to insert nil
entries into the destinationData
array. So first we need to check if the cell being created is a DefaultCell
or an ExpansionCell
. This is easily accomplished by checking if the index in the array is nil or not:
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// Row is DefaultCell
if let rowData = data[indexPath.row] {
let defaultCell = tableView.dequeueReusableCell(withIdentifier: "DefaultCell", for: indexPath) as! DefaultCell
defaultCell.DestinationLabel.text = rowData.name
defaultCell.PriceLabel.text = rowData.price
defaultCell.backgroundView = UIImageView(image: UIImage(named: rowData.imageName))
defaultCell.selectionStyle = .none
return defaultCell
}
// Row is ExpansionCell
else {
}
}
If the row is a DefaultCell
, the cell is dequeued using the ‘DefaultCell’ identifier, and the destination name, price, and background image are set.
Next we need to set the data for an expansion cell. As mentioned earlier, an expansion cell is represented by a nil
entry in the destinationData
array, therefore we need to find which data is associated with the nil
entry. One option is to get the cell before the expansion, and use its data to populate the ExpansionCell
. This solution works for 1 ExpansionCell
, but if there are multiple ExpansionCell
s, then the cell above the current cell may also be nil:
To get the ‘parent’ cell we need to go up the chain of cells until we find one that is not nil. This is accomplished by the following function. Put this function in the ExpandingTVC
class to find the parent cell:
/* Get parent cell for selected ExpansionCell */
private func getParentCellIndex(expansionIndex: Int) -> Int {
var selectedCell: DestinationData?
var selectedCellIndex = expansionIndex
while(selectedCell == nil && selectedCellIndex >= 0) {
selectedCellIndex -= 1
selectedCell = destinationData?[selectedCellIndex]
}
return selectedCellIndex
}
With this utility method, we can go ahead and implement the creation of ExpansionCell
s. Back in the tableView(... cellForRowAt ...)
function, insert the following inside the else parentheses:
// Row is ExpansionCell
else {
if let rowData = data[getParentCellIndex(expansionIndex: indexPath.row)] {
// Create an ExpansionCell
let expansionCell = tableView.dequeueReusableCell(withIdentifier: "ExpansionCell", for: indexPath) as! ExpansionCell
// Get the index of the parent Cell (containing the data)
let parentCellIndex = getParentCellIndex(expansionIndex: indexPath.row)
// Get the index of the flight data (e.g. if there are multiple ExpansionCells
let flightIndex = indexPath.row - parentCellIndex - 1
// Set the cell's data
expansionCell.StartLabel.text = rowData.flights?[flightIndex].start
expansionCell.EndLabel.text = rowData.flights?[flightIndex].end
expansionCell.selectionStyle = .none
return expansionCell
}
}
First we dequeue an ExpansionCell
using the identifier defined earlier. We then get the index of the parent cell using the getParentCellIndex()
function. Next, we need to get the index of the flight data that will be displayed in THIS ExpansionCell
. We get this from subtracting the index of THIS ExpansionCell
from the index of the parent DefaultCell
. We subtract a further 1 to ensure the index starts at 0. Finally we set the cell’s data and return it.
Your tableView(… cellForRowAt …) method should now look like this:
/* Create Cells */
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// Row is DefaultCell
if let rowData = destinationData?[indexPath.row] {
let defaultCell = tableView.dequeueReusableCell(withIdentifier: "DefaultCell", for: indexPath) as! DefaultCell
defaultCell.DestinationLabel.text = rowData.name
defaultCell.PriceLabel.text = rowData.price
defaultCell.backgroundView = UIImageView(image: UIImage(named: rowData.imageName))
return defaultCell
}
// Row is ExpansionCell
else {
if let rowData = destinationData?[getParentCellIndex(expansionIndex: indexPath.row)] {
// Create an ExpansionCell
let expansionCell = tableView.dequeueReusableCell(withIdentifier: "ExpansionCell", for: indexPath) as! ExpansionCell
// Get the index of the parent Cell (containing the data)
let parentCellIndex = getParentCellIndex(expansionIndex: indexPath.row)
// Get the index of the flight data (e.g. if there are multiple ExpansionCells
let flightIndex = indexPath.row - parentCellIndex - 1
// Set the cell's data
expansionCell.StartLabel.text = rowData.flights?[flightIndex].start
expansionCell.EndLabel.text = rowData.flights?[flightIndex].end
return expansionCell
}
}
return UITableViewCell()
}
We also need to tell the TableView
what height to use for the different types of cells. The following function does this:
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
if let rowData = destinationData?[indexPath.row] {
return 142
} else {
return 75
}
}
Expanding and Contracting Cells
To make the code a bit clearer, we’re going to split up the logic for expanding and contracting cells. This will require 2 function: expandCell()
and contractCell()
.
For the expanding the cell, create the following function:
private func expandCell(tableView: UITableView, index: Int) {
// Expand Cell (add ExpansionCells
if let flights = destinationData?[index]?.flights {
for i in 1...flights.count {
destinationData?.insert(nil, at: index + i)
tableView.insertRows(at: [NSIndexPath(row: index + i, section: 0) as IndexPath] , with: .top)
}
}
}
In the above code, we first check if the cell to be expanded has any flights stored. If it does, the for-loop proceeds through each flight, inserting nil into the destinationData
array (to represent the location of an ExpansionCell
), and calls the tableView.InsertRows()
function. In the insertRows()
function we pass the index where we want to insert a row, and the animation to use. We’re using the .top
animation for this, as it ‘pull-down’ the new cell from the one above it, giving the illusion of the cell expanding from under the above cell.
For contracting a cell, insert the following function into the ExpandingTVC
class:
private func contractCell(tableView: UITableView, index: Int) {
if let flights = destinationData?[index]?.flights {
for i in 1...flights.count {
destinationData?.remove(at: index+1)
tableView.deleteRows(at: [NSIndexPath(row: index+1, section: 0) as IndexPath], with: .top)
}
}
}
this function works similarly to the expandCell()
function, but instead deletes entries from the destinationData
array and removes rows from the table. This also uses the .top
animation to show the removed cell sliding up under the above cell.
Selecting Cells
Finally we connect our logic to the tableView(... didSelectCell...)
method, for when a user clicks on a cell. First we define the function and then check if the user clicked on a DefaultCell
. (For the purposes of this tutorial, we’re only expanding/contracting cells when the user clicks on the ‘parent’ DefaultCell
- nothing happens when the user clicks on an ExpansionCell):
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let data = destinationData?[indexPath.row] {
The next bit gets a bit complicated. We need to see if the cell below the selected cell is nil
or not, to check if the current cell is expanded. If the current cell is the last cell in the array, when we try to access the cell at indexPath.row + 1, we’ll get an ‘Array Index out of Range’ error. So first we check if this is the last cell in the array:
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let data = destinationData?[indexPath.row] {
// If user clicked last cell, do not try to access cell+1 (out of range)
if(indexPath.row + 1 >= (destinationData?.count)!) {
expandCell(tableView: tableView, index: indexPath.row)
}
If the user DOES click the last cell, then the only option is to expand it, so we call the expandCell()
function defined earlier. Now that this dodgy edge-case is taken care of, we can easily check the next cell below the current one:
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let data = destinationData?[indexPath.row] {
// If user clicked last cell, do not try to access cell+1 (out of range)
if(indexPath.row + 1 >= (destinationData?.count)!) {
expandCell(tableView: tableView, index: indexPath.row)
}
else {
// If next cell is not nil, then cell is not expanded
if(destinationData?[indexPath.row+1] != nil) {
expandCell(tableView: tableView, index: indexPath.row)
// Close Cell (remove ExpansionCells)
} else {
contractCell(tableView: tableView, index: indexPath.row)
}
}
}
}
And thats it! Run the code and you should now be able to expand cells 1 and 2.
Download - Github
The full source code for the project can be found on Github at:
https://github.com/codebasecampprojects/Expanding-TableView
—— Tom 2015.11


This blog, Des Paroz On The Go, has existed for many years (since c. 2003) and has had a consistent following among people interested in my thoughts and observations about marketing, business, technology, personal productivity and the online world.
Since moving out of a fulltime career in the IT industry in 2008, I've been building a business in vocation training and business development. My focus is on the recreational scuba diving industry, as I conduct PADI Instructor Development Courses and various other PADI, EFR, DAN and TecRec courses at the diver and instructor level.
A key focus for me is in developing dive and other outdoor recreation professionals with key skills in areas such as customer services and business, along with training skills.
So this blog is being relaunched to focus on business, the customer experience, personal productivity and technology that pertain to providing great customer service, in any industry. I'll discuss experiences as a customer, and my perceptions of marketing.
I look forward to interaction and discussion on these topics.


Welcome to test.robloxcom.me
View some of our projects!
Array parser and streak finder
PI Calculator using physics collisions
that is all


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Deeplearning4J - Arbiter UI
Session:
(Session ID)
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| PID | Bill No | Date | Description | Income | Expend/Stamp | ||
| {{x.id | numberFixedLen:3 }} | {{x.billno}} | {{x.date}} | {{x.description}} | {{ (x.type == 'Income')?( vm.add2Numbers(x.amount,x.stamp) | currency:"Rs. ") : "-" }} | {{ (x.type == 'Expenditure')?(x.amount | currency:"Rs. ") : (x.stamp | currency:"Rs. ") }} | ||
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DESENEX- miconazole nitrate powder
Novartis Consumer Health, Inc.
Disclaimer: Most OTC drugs are not reviewed and approved by FDA, however they may be marketed if they comply with applicable regulations and policies. FDA has not evaluated whether this product complies.
Active ingredient
Miconazole nitrate 2%
Uses
- cures most athlete’s foot (tinea pedis)
- relieves itching, burning, cracking and discomfort associated with athlete’s foot
Warnings
For external use only
Do Not Use
- in the eyes
- for nail or scalp infections
Stop use and ask a doctor if
- irritation occurs or gets worse.
- no improvement within 4 weeks
Keep Out of Reach of Children
If swallowed, get medical help or contact a poison control center right away.
Directions
- adults and children 2 years and older
- wash the affected area with soap and water and dry completely before applying
- apply a thin layer over affected area twice a day (morning and night) or as directed by a doctor
- supervise children in the use of this product
- pay special attention to the spaces between the toes. Wear well-fitting, ventilated shoes, and change shoes and socks at least once a day
- use every day for 4 weeks
- children under 2 years of age: ask a doctor
Other information
- store at controlled room temperature 20-25C (68-77F)
- See container bottom for lot number and expiration date
Inactive ingredients
corn starch, fragrance, talc
Questions or comments?
call 1-800-452-0051
Distributed by:
Novartis Consumer Health, Inc.
Parsippany, NJ 07054-0622
Principal Display Panel
NDC 0067-0949-30
2% Miconazole Nitrate, Antifungal
Desenex®
Powder
Absorbs Wetness
Cures Most Athlete’s Foot
Relieves Itching & Burning
Novartis Consumer Health, Inc.


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We would like to understand the impact of ride-pooling, particularly if all rides are meant to be shared. In order to do this, we have developed a framework to simulate ride-pooling scenarios including various service matching and rebalancing strategy. Then, to verify and study each scenario, we need to look into the simulator output, which logs all vehicle positions and activities. Your task is to analyze the logs through visualization. For this challenge, the simulation is limited to only Manhattan, and using 500 vehicles.
Question 2: Failed Requests
Question 3: Speeding
Question 4&5: Overload & Vehicle Utilization
Question 8: Vehicle Path
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Please contact us if you have any questions or suggestions!