Tutorial by Examples: st

closest() method

Returns the first element that matches the selector starting at the element and traversing up the DOM tree. HTML <div id="abc" class="row"> <div id="xyz" class="row"> </div> <p id="origin"> Hello &...

jQuery • DOM Traversing

Accessing character substrings

For the character entity character(len=5), parameter :: greeting = "Hello" a substring may be referenced with the syntax greeting(2:4) ! "ell" To access a single letter it isn't sufficient to write greeting(1) ! This isn't the letter "H" but greeting(1:...

Fortran • Data Types

GET requests

requests.get() creates a GET request: response = requests.get('https://example.com/') Pass in query parameters as a dictionary to the params argument: response = requests.get('https://example.com/', params={"a": 1, "b": 2}) For GET requests that might require basic authen...

python-requests • Getting started with python-requests

Custom Filters

Filters allows you to apply a function to a variable. This function may take 0 or 1 argument. Here is the syntax: {{ variable|filter_name }} {{ variable|filter_name:argument }} Filters can be chained so this is perfectly valid: {{ variable|filter_name:argument|another_filter }} If transla...

Django • Template Tags and Filters

Advanced custom tags using Node

Sometimes what you want to do is just too complex for a filter or a simple_tag. Fow this you will need to create a compilation function and a renderer. In this example we will create a template tag verbose_name with the following syntax: ExampleDescription{% verbose_name obj %}Verbose name of a mo...

Django • Template Tags and Filters

Checking if a file or a directory exists

Asynchronously var fs = require('fs'); fs.stat('path/to/file', function(err) { if (!err) { console.log('file or directory exists'); } else if (err.code === 'ENOENT') { console.log('file or directory does not exist'); } }); Synchronously here, we must wr...

Node.js • Filesystem I/O

Installing JSP

Content has been moved back to good 'ol JSP wiki page

jsp • Getting started with jsp

Apply part of a stash with checkout

You've made a stash and wish to checkout only some of the files in that stash. git checkout stash@{0} -- myfile.txt

Git • Stashing

What is Tail Call Optimization (TCO)

TCO is only available in strict mode As always check browser and Javascript implementations for support of any language features, and as with any javascript feature or syntax, it may change in the future. It provides a way to optimise recursive and deeply nested function calls by eliminating the n...

JavaScript • Tail Call Optimization

Installation or Setup

Log into your AWS Console and click on Lambda under the Services tab. Under Functions you'll be able to Create a Lambda function using the same-labeled button. You'll be shown a screen where you can select a blueprint. These are simply starting points to existing Lambda functions fo...

aws-lambda • Getting started with aws-lambda

Custom HTML Helper - Display Name

/// <summary> /// Gets displayName from DataAnnotations attribute /// </summary> /// <typeparam name="TModel"></typeparam> /// <typeparam name="TProperty"></typeparam> /// <param name="htmlHelper"></param> /// <pa...

asp.net-mvc • Html Helpers

Custom Helper - Render submit button

/// <summary> /// Creates simple button /// </summary> /// <param name="poHelper"></param> /// <param name="psValue"></param> /// <returns></returns> public static MvcHtmlString SubmitButton(this HtmlHelper poHelper, string ps...

asp.net-mvc • Html Helpers

Installation or Setup

Using a CDN: <!DOCTYPE html> <head> <script src="https://cdn.jsdelivr.net/rxjs/4.1.0/rx.min.js"></script> </head> <body> <script> // `Rx` is available var one$ = Rx.Observable.of(1); var onesub = one$.subscribe(function (...

rxjs • Getting started with rxjs

Custom log file

Mage::log('My log entry', null, 'mylogfile.log'); This wil log to /var/log/mylogfile.log

magento • Logging to file

Installation or Setup

Detailed instructions on getting facebook-graph-api set up or installed.

facebook-graph-api • Getting started with facebook-graph-api

Alternative syntax for control structures

PHP provides an alternative syntax for some control structures: if, while, for, foreach, and switch. When compared to the normal syntax, the difference is, that the opening brace is replaced by a colon (:) and the closing brace is replaced by endif;, endwhile;, endfor;, endforeach;, or endswitch;, ...

PHP • Control Structures

Set Image for On/Off state

Objective-C //set off-image mySwitch.offImage = [UIImage imageNamed:@"off_image"]; [mySwitch setOffImage:[UIImage imageNamed:@"off_image"]]; //set on-image mySwitch.onImage = [UIImage imageNamed:@"on_image"]; [mySwitch setOnImage:[UIImage imageNamed:@"on_im...

iOS • UISwitch

Delete an item in a list

SP.SOD.executeOrDelayUntilScriptLoaded( function(){ deleteItem(1); }, "sp.js"); function deleteItem(id){ var clientContext = new SP.ClientContext(); var list = clientContext.get_web().get_lists().getByTitle("List Title"); var item = list.getItemById(id); it...

sharepoint • Working with JavaScript Client Object Model (JSOM)

Show an Existing Page in a Dialog

SP.SOD.executeOrDelayUntilScriptLoaded(showDialog,"sp.js"); function showDialog(){ SP.UI.ModalDialog.showModalDialog( { url: "/org/it/web/wik/Lists/ExampleCode/DispForm.aspx?ID=6" } ); }

sharepoint • Working with Modal Dialog Boxes with JavaScript

Get a List Item by ID

SP.SOD.executeOrDelayUntilScriptLoaded(myFunction,"sp.js"); function myFunction(){ var clientContext = new SP.ClientContext(); var list = clientContext.get_web().get_lists().getByTitle("List Title"); var item = list.getItemById(1); // get item with ID == 1 ...

sharepoint • Working with JavaScript Client Object Model (JSOM)