Tutorial by Examples: l

#!/usr/bin/env perl use strict; use warnings 'all'; use XML::Twig; my $twig = XML::Twig->parse( \*DATA ); #we can use the 'root' method to find the root of the XML. my $root = $twig->root; #first_child finds the first child element matching a value. my $title = $root->firs...

Pseudo-elements are often used to change the look of lists (mostly for unordered lists, ul). The first step is to remove the default list bullets: ul { list-style-type: none; } Then you add the custom styling. In this example, we will create gradient boxes for bullets. li:before { conte...

The default gnuplot command plot (also only p) plot dataset with columns, of the form of the data_set.dat file below. # Prototype of a gnuplot data set # data_set.dat # X - X^2 - 2*X - Random 0 0 0 5 1 1 2 15 1.4142 2 2.8284 1 2 ...

Android $ react-native log-android iOS $ react-native log-ios

JasperReports Library JasperReports is a open source Java based reporting tool. The JasperReports Library can be downloaded from the Jaspersoft Community for the latest release. In recent releases the third-party jars in the lib folder are not distributed, they need to be download from public r...

Windows Phone 8.1 SDK requires Visual Studio. Either check "SDK" when installing Visual Studio or install the SDK directly here.

You should initialize state inside the constructor function of your component like this: export default class MyComponent extends Component { constructor(props) { super(props); this.state = { myInteger: 0 } } render() { return ( <View> ...

To initialize react-native init MyAwesomeProject To initialize with a specific version of React Native react-native init --version="0.36.0" MyAwesomeProject To Run for Android cd MyAwesomeProject react-native run-android To Run for iOS cd MyAwesomeProject react-native run-io...

The <see> tag can be used to link to another class. It contains the cref member which should contain the name of the class that is to be referenced. Visual Studio will provide Intellsense when writing this tag and such references will be processed when renaming the referenced class, too. /// ...

You can use the System.IO.File.ReadAllText function to read the entire contents of a file into a string. string text = System.IO.File.ReadAllText(@"C:\MyFolder\MyTextFile.txt"); You can also read a file as an array of lines using the System.IO.File.ReadAllLines function: string[] line...

The System.IO.StreamWriter class: Implements a TextWriter for writing characters to a stream in a particular encoding. Using the WriteLine method, you can write content line-by-line to a file. Notice the use of the using keyword which makes sure the StreamWriter object is disposed as soon as ...

You can use the System.IO.File.WriteAllText function to write a string to a file. string text = "String that will be stored in the file"; System.IO.File.WriteAllText(@"C:\MyFolder\OutputFile.txt", text); You can also use the System.IO.File.WriteAllLines function which receiv...

Detailed instructions on getting windows-phone set up or installed.

There are two main approaches to creating a thread in Java. In essence, creating a thread is as easy as writing the code that will be executed in it. The two approaches differ in where you define that code. In Java, a thread is represented by an object - an instance of java.lang.Thread or its subcl...

A simple example of using multiple processes would be two processes (workers) that are executed separately. In the following example, two processes are started: countUp() counts 1 up, every second. countDown() counts 1 down, every second. import multiprocessing import time from random impor...

import UIKit import WebKit class ViewController: UIViewController, UISearchBarDelegate, WKNavigationDelegate, WKUIDelegate { var searchbar: UISearchBar! //All web-browsers have a search-bar. var webView: WKWebView! //The WKWebView we'll use. var toolbar: UIToolbar! //Toolb...

A file can be locked using the FileChannel API that can be acquired from Input Output streams and readers Example with streams // Open a file stream FileInputStream ios = new FileInputStream(filename); // get underlying channel FileChannel channel = ios.getChannel(); /* * t...

To ensure that our collection can be iterated using iterator or for-each loop, we have to take care of following steps: The stuff we want to iterate upon has to be Iterable and expose iterator(). Design a java.util.Iterator by overriding hasNext(), next() and remove(). I have added a simple ...

Matching an email address within a string is a hard task, because the specification defining it, the RFC2822, is complex making it hard to implement as a regex. For more details why it is not a good idea to match an email with a regex, please refer to the antipattern example when not to use a ...

Sometimes we need preserve whole model and transfer it across actions or even controllers. Storing model at session good solution for this type of requirements. If we combine this with powerful model binding features of MVC we get elegant way of doing so. We can create generic session based model bi...