Tutorial by Examples: x

GNU awk supports a sub-string extraction function to return a fixed length character sequence from a main string. The syntax is *substr(string, start [, length ])* where, string is source string and start marks the start of the sub-string position you want the extraction to be done for an optio...

NSTextAttachment *attachment = [[NSTextAttachment alloc] init]; attachment.image = [UIImage imageNamed:@"imageName"]; attachment.bounds = CGRectMake(0, 0, 35, 35); NSAttributedString *attachmentString = [NSAttributedString attributedStringWithAttachment:attachment];

SQL Server and SQLite allow to create indexes that contain not only a subset of columns, but also a subset of rows. Consider a constant growing amount of orders with order_state_id equal to finished (2), and a stable amount of orders with order_state_id equal to started (1). If your business make ...

To store a graph, two methods are common: Adjacency Matrix Adjacency List An adjacency matrix is a square matrix used to represent a finite graph. The elements of the matrix indicate whether pairs of vertices are adjacent or not in the graph. Adjacent means 'next to or adjoining something el...

Add a reference of AjaxToolkitControl.dll into your project. Then drag and drop Toolkit Script Manager and AjaxFileUpload Control from Visual Studio Toolbox window to your .aspx page like this : use this code on your aspx.cs file Make sure you have created folder named as Uploads in...

doOnNext operator called every time when source Observable emits an item. It can be used for debugging purposes, applying some action to the emitted item, logging, etc... Observable.range(1, 3) .doOnNext(value -> System.out.println("before transform: " + value)) .map(value -&...

Add the Gtk dependecy to your Cargo.toml: [dependencies] gtk = { git = "https://github.com/gtk-rs/gtk.git" } Create a simple window with the following: extern crate gtk; use gtk::prelude::*; // Import all the basic things use gtk::{Window, WindowType, Label}; fn main() { ...

extern crate gtk; use gtk::prelude::*; use gtk::{Window, WindowType, Label, Entry, Box as GtkBox, Orientation}; fn main() { if gtk::init().is_err() { println!("Failed to initialize GTK."); return; } let window = Window::new(WindowType::Toplevel); ...

seemed the only way to add a comment. One thing that's easy to forget is that if you string some variables like the example above, and the resulting length is SHORTER than what was originally in the receiving variable (o- string above) then"trailing"characters are left in place. For exam...

Will talk about directory structure of CakePHP, what each folder means. CakePHP has some main folders app - It Contains our application source code, all our code lies under this directory. lib - This is the cakephp core liberary, it contains all the base cakephp library code. Editing code insid...

One of the most important implementations of Dynamic Programming is finding out the Longest Common Subsequence. Let's define some of the basic terminologies first. Subsequence: A subsequence is a sequence that can be derived from another sequence by deleting some elements without changing the orde...

If you want to perform a user input validation of your textfield use the following code snippet: // MARK: - UITextFieldDelegate let allowedCharacters = CharacterSet(charactersIn:"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvxyz").inverted func textField(_ textField:...

Add the following code to your app.js file: var express = require('express') var morgan = require('morgan') var app = express() app.use(morgan('combined')) app.get('/', function (req, res) { res.send('hello, world!') }) Now when you access your website you will see in the console y...

First, install fs and path in your project npm install --save fs path Add the following code to your app.js file: var express = require('express') var fs = require('fs') var morgan = require('morgan') var path = require('path') var app = express() // create a write stream (in append mo...

First, install fs, file-stream-rotator and path in your project npm install --save fs file-stream-rotator path Add the following code to your app.js file: var FileStreamRotator = require('file-stream-rotator') var express = require('express') var fs = require('fs') var morgan = require('morg...

To understand this example, it is recommended to have a brief idea on Bellman-Ford single source shortest path algorithm which can be found here In Bellman-Ford algorithm, to find out the shortest path, we need to relax all the edges of the graph. This process is repeated at most (V-1) times, where...

Deref has a simple rule: if you have a type T and it implements Deref<Target=F>, then &T coerces to &F, compiler will repeat this as many times as needed to get F, for example: fn f(x: &str) -> &str { x } fn main() { // Compiler will coerce &&&&&&a...

// 1.0 // Utilize the type argument and raw Strings to filter your // execution by the action function beforeLoad(type, form, request) { // Don't do anything on APPROVE // Note that `type` is an Object, so we must use ==, not === if (type == "approve") { return...

In SuiteScript 1.0, we retrieve the current execution context using nlapiGetContext().getExecutionContext(), then we compare the result to the appropriate raw Strings. // 1.0 in Revealing Module pattern var myNamespace = myNamespace || {}; myNamespace.example = (function () { var exports =...

The following example will contain a block of code that is meant to be split into several source files, as denoted by // filename comments. Source Files // my_function.h /* Note how this header contains only a declaration of a function. * Header functions usually do not define implementations...