Tutorial by Examples: en

C++ References are Alias of existing variables

A Reference in C++ is just an Alias or another name of a variable. Just like most of us can be referred using our passport name and nick name. References doesn't exist literally and they don't occupy any memory. If we print the address of reference variable it will print the same address as that of...

AsyncTask from concept to implementation

Concept AsyncTask is a class that allows running operations in the background, with the results being published on the UI thread. The main purpose is to eliminate all the boilerplate code for starting/running a thread by eliminating the handlers and all the stuff that are needed for manipulating t...

Creating Singleton class and also preventing it from having multiple instances using alloc/init.

We can create Singleton class in such a way that developers are forced to used the shared instance (singleton object) instead of creating their own instances. @implementation MySingletonClass + (instancetype)sharedInstance { static MySingletonClass *_sharedInstance = nil; static dispa...

Merge Sort Implementation in Go

package main import "fmt" func mergeSort(a []int) []int { if len(a) < 2 { return a } m := (len(a)) / 2 f := mergeSort(a[:m]) s := mergeSort(a[m:]) return merge(f, s) } func merge(f []int, s []int) []int { var i, j int size :...

Hello World with Nested Dependencies

The following example expands upon Hello World by demonstrating multiple dependencies using the define() function. Create a new HTML file called index.html and paste the following content: <!DOCTYPE html> <html lang="en"> <head> <title>Hello RequireJS</t...

Using data-main Entry Point

A single entry point to your application is possible with RequireJS by using the data-main attributed within the <script> tag. <script type="text/javascript" data-main="scripts/main" src="http://requirejs.org/docs/release/2.3.2/minified/require.js"></scr...

Planning for localization : enable RTL support in Manifest

RTL (Right-to-left) support is an essential part in planning for i18n and L10n. Unlike English language which is written from left to right, many languages like Arabic, Japanese, Hebrew, etc. are written from right to left. To appeal to a more global audience, it is a good idea to plan your layouts ...

Script Recording with the BlazeMeter Chrome Extension

So far we’ve covered the basic ways to record test scenarios. But one of the fastest and easiest ways to record your performance scripts, which is also free, is to use the BlazeMeter Recorder Chrome extension. These recordings can be run in JMeter or in BlazeMeter. The reason the extension is so us...

List contents of an archive

List the contents of an archive file without extracting it: tar -tf archive.tar.gz Folder-In-Archive/ Folder-In-Archive/file1 Folder-In-Archive/Another-Folder/ Folder-In-Archive/Another-Folder/file2

"Hello World" using when and then or expect

import spock.lang.* class HelloWorldSpec extends Specification { @Shared message = 'Hello world!' def "The world can say hello using when and then"() { when: def newMessage = message then: newMessage == 'Hello world!' } ...

Dependency Injection Into Twig Extensions

This example will show you how to use Dependency Inject to use other services registered in the Drupal environment. Imagine you have an SVG image file that changes colors depending on some random CSS/Javascript thing in your project. To be able to target the SVG with CSS you have to actually have t...
drupal • Twig

Commenting your code

There are several ways to mark a comment block as a detailed description, so that this comment block is parsed by Doxygen and added as a description of the following code item to the documentation. The first and most common one are C style comments with an extra asterisk in the comment start sequenc...

UITableView in SKScene

import SpriteKit import UIKit class GameRoomTableView: UITableView,UITableViewDelegate,UITableViewDataSource { var items: [String] = ["Player1", "Player2", "Player3"] override init(frame: CGRect, style: UITableViewStyle) { super.init(frame: frame, s...

Find the single most recent item in a list of timestamped events

In tables recording events there is often a datetime field recording the time an event happened. Finding the single most recent event can be difficult because it's always possible that two events were recorded with exactly identical timestamps. You can use row_number() over (order by ...) to make su...

Acquire HERE SDK Credentials

Typically, before developing a new HERE SDK application, you need to acquire a set of credentials by registering your application on http://developer.here.com. Each application requires a unique set of credentials. When you register your app, the registered bundle identifier must match the package n...

PERCENT_RANK and CUME_DIST

The PERCENT_RANK function calculates the ranking of a row relative to the row set. The percentage is based on the number of rows in the group that have a lower value than the current row. The first value in the result set always has a percent rank of zero. The value for the highest-ranked – or last...

PERCENTILE_DISC and PERCENTILE_CONT

The PERCENTILE_DISC function lists the value of the first entry where the cumulative distribution is higher than the percentile that you provide using the numeric_literal parameter. The values are grouped by rowset or partition, as specified by the WITHIN GROUP clause. The PERCENTILE_CONT functi...

Python Implementation of KMP algorithm.

Haystack: The string in which given pattern needs to be searched. Needle: The pattern to be searched. Time complexity: Search portion (strstr method) has the complexity O(n) where n is the length of haystack but as needle is also pre parsed for building prefix table O(m) is required for building p...

Environment details:

When asking Apache Spark related questions please include following information Apache Spark version used by the client and Spark deployment if applicable. For API related questions major (1.6, 2.0, 2.1 etc.) is typically sufficient, for questions concerning possible bugs always use full version ...

Simple Username-Password Authentication

In your routes/index.js Here user is the model for the userSchema router.post('/login', function(req, res, next) { if (!req.body.username || !req.body.password) { return res.status(400).json({ message: 'Please fill out all fields' }); } passpor...

Page 226 of 275

logo rip
SUPPORT & PARTNERS
STAY CONNECTED

Get monthly updates about new articles, cheatsheets, and tricks.