Tutorial by Examples: et

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

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

Simple tags

The simplest way of defining a custom template tag is to use a simple_tag. These are very straightforward to setup. The function name will be the tag name (though you can override it), and arguments will be tokens ("words" separated by spaces, except spaces enclosed between quotes). It eve...

Django • Template Tags and Filters

Return the query when an error occurs

You can attach the query executed to your err object when an error occurs: var q = mysql.query('SELECT `name` FROM `pokedex` WHERE `id` = ?', [ 25 ], function (err, result) { if (err) { // Table 'test.pokedex' doesn't exist err.query = q.sql; // SELECT `name` FROM `pokedex` WHERE `id` ...

Node.js • MySQL integration

HashSet

This is a collection of unique items, with O(1) lookup. HashSet<int> validStoryPointValues = new HashSet<int>() { 1, 2, 3, 5, 8, 13, 21 }; bool containsEight = validStoryPointValues.Contains(8); // O(1) By way of comparison, doing a Contains on a List yields poorer performance: Lis...

C# Language • An overview of c# collections

Setter Injection

Dependencies can also be injected by setters. interface Logger { public function log($message); } class Component { private $logger; private $databaseConnection; public function __construct(DatabaseConnection $databaseConnection) { $this->databaseConnection = $...

PHP • Dependency Injection

ASP.NET Overview

ASP.NET is a unified Web development model that includes the services necessary for you to build enterprise-class Web applications with a minimum of coding. ASP.NET is part of the .NET Framework, and when coding ASP.NET applications you have access to classes in the .NET Framework. You can code you...

ASP.NET • Getting started with ASP.NET

Serialization using Json.NET

[JsonObject("person")] public class Person { [JsonProperty("name")] public string PersonName { get; set; } [JsonProperty("age")] public int PersonAge { get; set; } [JsonIgnore] public string Address { get; set; } } Person person = new...

.NET Framework • JSON Serialization

using LOAD DATA INFILE to load large amount of data to database

Consider the following example assuming that you have a ';'-delimited CSV to load into your database. 1;max;male;manager;12-7-1985 2;jack;male;executive;21-8-1990 . . . 1000000;marta;female;accountant;15-6-1992 Create the table for insertion. CREATE TABLE `employee` ( `id` INT NOT NULL , ...

MySQL • LOAD DATA INFILE

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

SortedSet

// create an empty set var mySet = new SortedSet<int>(); // add something // note that we add 2 before we add 1 mySet.Add(2); mySet.Add(1); // enumerate through the set foreach(var item in mySet) { Console.WriteLine(item); } // output: // 1 // 2

C# Language • An overview of c# collections

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

Setup Server

You need to having a server running online. To securely associate your iOS app with a server, Apple requires that you make available a configuration file, called apple-app-site-association. This is a JSON file which describes the domain and supported routes. The apple-app-site-association file need...

iOS • Universal Links

Setup iOS Application (Enabling Universal Links)

The setup on the app side requires two things: Configuring the app’s entitlement, and enabling the universal links by turning on the Associated Domains capability in the project. Handling Incoming Links in your AppDelegate. 1. Configuring the app’s entitlement, and enabling universal links. ...

iOS • Universal Links

Installation or Setup

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

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

return

The return statement returns the program control to the calling function. When return is called from within a function, the execution of the current function will end. function returnEndsFunctions() { echo 'This is executed'; return; echo 'This is not executed.'; } When you run re...

PHP • Control Structures

Checking, setting, clearing, and toggling individual bits. Using long as bit mask

Assuming we want to modify bit n of an integer primitive, i (byte, short, char, int, or long): (i & 1 << n) != 0 // checks bit 'n' i |= 1 << n; // sets bit 'n' to 1 i &= ~(1 << n); // sets bit 'n' to 0 i ^= 1 << n; // toggles the value of bit 'n' Us...

Java Language • Bit Manipulation

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

Active Patterns with parameters

Active patterns are just simple functions. Like functions you can define additional parameters: let (|HasExtension|_|) expected (uri : string) = let result = uri.EndsWith (expected, StringComparison.CurrentCultureIgnoreCase) match result with | true -> Some true | _ -> N...

F# • Active Patterns

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)