David Goussev DavidGoussev

#Node - Processes To launch an external shell command or executable file you can use the child_process. Apart from command line arguments and environment variables you cannot communicate with the process using child_process.exec. However you can use child_process.spawn to create a more integrated processes.

##Executing Child Processes

###To launch an external shell command

var child_process = require('child_process');
var exec = child_process.exec;

	function chkLine(a,b,c,d) {
	// Check first cell non-zero and all cells match
	return ((a != 0) && (a ==b) && (a == c) && (a == d));
	}

	function chkWinner(bd) {
	// Check down
	for (r = 0; r < 3; r++)
	for (c = 0; c < 7; c++)
	if (chkLine(bd[r][c], bd[r+1][c], bd[r+2][c], bd[r+3][c]))

	function ($) {
	$('button').on('click', function () {
	// remove resultset if this has already been run
	$('.content ul').remove();
	// add spinner to indicate something is happening
	$('<i class="fa fa-refresh fa-spin"/>').appendTo('body');

	// get selected zip code from selectbox
	var zip = $('select option:selected').text().substring(1, 6);

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>JS Bin</title>
	</head>
	<body>

	<script id="jsbin-javascript">

	define(["require", "exports"], function (require, exports) {
	/**
	* Helper to use the Command Line Interface (CLI) easily with both Windows and Unix environments.
	* Requires underscore or lodash as global through "_".
	*/
	var Cli = (function () {
	function Cli() {
	}
	/**
	* Execute a CLI command.

	function dedupe(arr) {
	var i, j = arr.length, deduped = [];

	for (i=0; i < j; i++) {
	if (deduped.indexOf(arr[i]) === -1 && arr.indexOf(arr[i], i+1) !== -1) {
	deduped.push(arr[i]);
	}
	}
	return deduped;
	}

	# Word Correction Take-Home

	Write a program in JavaScript that reads a large list of English words (e.g. from /usr/share/dict/words on a unix system) into memory, and then reads words from stdin, and prints either the best spelling correction, or "NO CORRECTION" if no suitable correction can be found.

	The program should print "> " as a prompt before reading each word, and should loop until killed.

	For example:

	$node ./spellcorrecter.js
	> sheeeeep

	<ul class="tags">
	{% for tag in page.tags %}
	<li><a href="{{site.baseurl}}tags#{{tag}}" class="tag">{{ tag }}</a></li>
	{% endfor %}
	</ul>

	app.controller('MainCtrl', ['$scope', 'PresenceService', function ($scope, PresenceService) {
	$scope.totalViewers = 0;

	$scope.$on('onOnlineUser', function(){
	$scope.$apply(function () {
	$scope.totalViewers = PresenceService.getOnlineUserCount();
	});
	});
	}]);

	git branch -m old_branch new_branch # Rename branch locally
	git push origin :old_branch # Delete the old branch
	git push --set-upstream origin new_branch # Push the new branch, set local branch to track the new remote