Tutorial by Examples: re

//'client.jade' //a button is placed down; similar in HTML button(type='button', id='send_by_button') Modify data #modify Lorem ipsum Sender //loading jQuery; it can be done from an online source as well script(src='./js/jquery-2.2.0.min.js') //AJAX request ...

Loop n times: while [ $((i=${i:=0}+1)) -le "$n" ]; do echo line $i done Output for n=5: line 1 line 2 line 3 line 4 line 5 Manipulating decimals: $ i=3.14159; echo $((${i%.*}*2)) 6 $ i=3.14159; echo $((${i#*.}*2)) 28318

Absolute value: $ for n in -8 -2 0 3 4; do > echo $((n<0?-n:n)) > done 8 2 0 3 4 Fix variable range: $ min=2 $ max=4 $ for n in 1 2 3 4 5; do > echo $((n<min?min:n>max?max:n)) > done 2 2 3 4 4

Remove the token from the client storage to avoid usage Tokens are issued by the server and you can not force browsers to delete a cookie/localStorage or control how external clients are managing your tokens. Obviously if attackers have stolen the token before logout they still could use the token,...

This will download libpng from the official "git" repository and build it in your "libpng" directory. git clone https://github.com/glennrp/libpng.git libpng cd libpng ./autogen.sh ./configure [--prefix=/path] make install where "/path" points to the installation...

Basic architecture examples on how development for embedded systems works (i.e. IDEs, cross-compiling, downloading, in-line debugging, JTAG,...) and what would be the minimum requirements for starting. It would be worth mentioning different approaches and platforms from begginers-higher level to ad...

import { expect } from 'chai'; import { createStore } from 'redux'; describe('redux store test demonstration', () => { describe('testReducer', () => { it('should increment value on TEST_ACTION', () => { // define a test reducer with initial state: test: 0 const te...

A very simple example would be to fade out an SKSpriteNode. In Swift: let node = SKSpriteNode(imageNamed: "image") let action = SKAction.fadeOutWithDuration(1.0) node.runAction(action)

Sometimes it is necessary to do an action on repeat or in a sequence. This example will make the node fade in and out a total of 3 times. In Swift: let node = SKSpriteNode(imageNamed: "image") let actionFadeOut = SKAction.fadeOutWithDuration(1.0) let actionFadeIn = SKAction.fadeInWithD...

You can use Firebase Authentication to let your users authenticate with Firebase using their email addresses and passwords, and to manage your app's password-based accounts. In this example, we use these steps to set it up for our Android project which is based on JavaScript. But before doing so, ...

$rootScope.$on listeners will remain in memory if you navigate to another controller. This will create a memory leak if the controller falls out of scope. Don't angular.module('app').controller('badExampleController', badExample); badExample.$inject = ['$scope', '$rootScope']; function badExam...

2.04 Bash treats some paths as special and can do some network communication by writing to /dev/{udp|tcp}/host/port. Bash cannot setup a listening server, but can initiate a connection, and for TCP can read the results at least. For example, to send a simple web request one could do: exec 3</...

A child theme is identified by WordPress when there is a directory (for example child-theme) inside /wp-content/themes/ with the following files: style.css This file must start with a comment template like this: /* Theme Name: Example Child Author: Me Author URI: https://example.com/ ...

Even if it is not a best practice, sometimes you need to replace assets like CSS or JS files or libraries. Note that the WordPress template overwriting system doesn't work with anything else than .php files, so when we talk about assets we refer to registered assets One example could be the replac...

Steps to reset database in Heroku: 1. Drop the database, when SHARED_DATABASE_URL is used: heroku pg:reset DATABASE 2. Recreate the database with nothing in it: heroku run rake db:migrate 3. Populate the database with your seed data: heroku run rake db:seed Steps 2 and 3 can be combined...

Sometimes we have requirement of parsing pages, but doing so requires you to be an authorised user. Here is an example which shows you how to do in oracle sign in. import sys import requests import json from bs4 import BeautifulSoup def mprint(x): sys.stdout.write(x) print re...

Installers are custom types that implement the IWindsorInstaller interface and are used to register Components to the container, using the fluent registration API. public class MyInstaller : IWindsorInstaller { public void Install(IWindsorContainer container, IConfigurationStore store) {...

When registering types to the container Castle uses the type of the class in order to resolve. In the case that there is more than one registration for a specific type the Name property must be set: public void Install(IWindsorContainer container, IConfigurationStore store) { container.Regist...

<PropertyGroup> <DirectoryToCreate>NewDirectory</DirectoryToCreate> </PropertyGroup> <MakeDir Directories="$(DirectoryToCreate)" />

<PropertyGroup> <DirectoryToRemove>TempData</DirectoryToRemove> </PropertyGroup> <RemoveDir Directories="$(DirectoryToRemove)" />