Tutorial by Examples: i

Cloning all repositories for a username

Run the following command, replacing username with the username, to clone all of the GitHub repositories for that user to the current directory. curl "https://api.github.com/users/username/repos?page=1&per_page=100" | grep -e 'git_url*' | cut -d \" -f 4 | xargs -L1 git clone T...

github • Backing up GitHub

Testing and installating Coq

Testing without installing For new users who wish to start testing Coq without installing it on their machine, there is an online IDE called JsCoq (presentation here). The package sub-window allows testing various well-known additional packages. Installation The download page contains installers ...

coq • Getting started with coq

Importing in app modules

Node modules import url from 'url'; import moment from 'moment'; Meteor packages import { Meteor } from 'meteor/meteor'; import { SimpleSchema } from 'meteor/aldeed:simple-schema';

meteor • ES2015 modules (Import & Export)

Importing in Meteor packages

In package.js: Npm.depends({ moment: "2.8.3" }); In a package file: import moment from 'moment';

meteor • ES2015 modules (Import & Export)

Exporting variables from app modules

// Default export export default {}; // Named export export const SomeVariable = {};

meteor • ES2015 modules (Import & Export)

Exporting symbols from Meteor packages

In your mainModule file: export const SomeVar = {};

meteor • ES2015 modules (Import & Export)

Event Properties

If a class raises a large the number of events, the storage cost of one field per delegate may not be acceptable. The .NET Framework provides event properties for these cases. This way you can use another data structure like EventHandlerList to store event delegates: public class SampleClass { ...

C# Language • Events

Launch a Shiny app

You can launch an application in several ways, depending on how you create you app. If your app is divided in two files ui.R and server.R or if all of your app is in one file. 1. Two files app Your two files ui.R and server.Rhave to be in the same folder. You could then launch your app by running ...

R Language • Shiny

Comparison Operators

OperatorDescription==true if the two values are equal.!=true if the two values are not equal.<true if the value of the operand on the left is less than the value on the right.>true if the value of the operand on the left is greater than the value on the right.>=true if the value of the oper...

Ruby Language • Operators

Embedding into HTML

There are three possibilities to insert Elm code into a existing HTML page. Embed into the body tag Supposing you have compiled the Hello World example into elm.js file, you can let Elm take over the <body> tag like so: <!DOCTYPE html> <html> <body> <scri...

Elm Language • Getting started with Elm Language

How to set the time zone in CodeIgniter

Placing date_default_timezone_set('Asia/Kolkata'); on config.php above base URL also works. PHP List of Supported Time Zones application/config.php <?php defined('BASEPATH') OR exit('No direct script access allowed'); date_default_timezone_set('Asia/Kolkata'); Another way I have found...

codeigniter • How to set time zone in CodeIgniter

Installation or Setup

The best way to get started with Salesforce is to get your own Developer Edition. Developer Edition (often referred to as a "DE org") is a fully-featured development environment with limits on data and users. Developer Edition is where you can get familiar with the environment, try out st...

Salesforce • Getting started with Salesforce

Selecting Data

The following functions allow you to build SQL SELECT statements. $this->db->get() This runs the selection query and returns the result. Can be used by itself to retrieve all records from a table: $query = $this->db->get('tablename'); // Produces: SELECT * FROM tablename The sec...

codeigniter • Query Structure

Creating and calling a library

In order to use libraries in CodeIgniter, you need to create a library. class Pro { function show_hello_world() { return 'Hello World'; } } In this library, which is called is pro.php, this file must be added to the following path. Path: \xampp\htdocs\project\application\librarie...

codeigniter • How to use the CI libraries and helper?

Beginner program

Html has beginnerProgram mostly for learning purposes. beginnerProgram is not capable of handling Subscriptions or running Commands. It is only capable of handling user input from DOM Events. It only requires a view to render the model and an update function to handle state changes. Example Con...

Elm Language • The Elm Architecture

Program with Flags

programWithFlags has only one difference from program. It can accept the data upon initialization from JavaScript: var root = document.body; var user = { id: 1, name: "Bob" }; var app = Elm.Main.embed( root, user ); The data, passed from JavaScript is called Flags. In this example ...

Elm Language • The Elm Architecture

One way parent-child communication

Example demonstrates component composition and one-way message passing from parent to children. 0.18.0 Component composition relies on Message tagging with Html.App.map 0.18.0 In 0.18.0 HTML.App was collapsed into HTML Component composition relies on Message tagging with Html.map Example ...

Elm Language • The Elm Architecture

Adding eslint to your Meteor project

We'll use the popular eslint-config-airbnb as a starter as well as Meteor specific rules using eslint-import-resolver-meteor. We also need to install babel-parser to lint Meteor enabled ES7 features such as async/await. cd my-project npm install --save-dev eslint-config-airbnb eslint-plugin-impor...

meteor • ESLint

Using an npm script to lint your code

Edit your package.json to add the following script : { "scripts": { "lint": "eslint .;exit 0" } } Then run it using npm run lint We use exit 0 as a trick to gracefully terminate the script when linting fails, otherwise npm will use eslint return code an...

meteor • ESLint

Creating a Timer

This will create a timer to call the doSomething method on self in 5.0 seconds. [NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:@selector(doSomething) userInfo:nil repeats:NO]; Setting the repeats parameter to false/NO indicates that we...

Objective-C Language • NSTimer