jswhisperer

// Set up a simple object to use as "context"
var context = { foo: "bar" };

// A function that uses a reference to a variable called "foo"
// on the "this" context.
function returnFoo () {
  return this.foo;
}

// This variable does not exist on scope, so is undefined.

jswhisperer

  function sleep(milliSeconds) {
    var startTime = new Date().getTime();
    while (new Date().getTime() < startTime + milliSeconds);
  }

  sleep(10000);

jswhisperer

var getterSetter = function() {
  var items = {};

  this.get = function(name) {
    return items[name];
  };

  this.set = function(name, value) {
    items[name] = value;
  };

jswhisperer

var MongoClient = require('mongodb').MongoClient,
	request = require('request');

MongoClient.connect('mongodb://localhost:27017/course', function(err, db) {
	if(err) throw err;

	request('http://www.reddit.com/r/technology/.json', function(error, response, body) {
		if(!error && response.statusCode == 200) {
			var obj = JSON.parse(body);
			var stories = obj.data.children.map(function(story){ return story.data; });

jswhisperer

// Mistake
var str = "David is an Arsenal fan, which means David is great";
str.replace("David", "Darren"); // "Darren is an Arsenal fan, which means David is great"

// Desired
str.replace(/David/g, "Darren"); // "Darren is an Arsenal fan, which means Darren is great"

jswhisperer

[
    { name: "Robin Van PurseStrings", age: 30 },
    { name: "Theo Walcott", age: 24 },
    { name: "Bacary Sagna", age: 28  }
].sort(function(obj1, obj2) {
    // Ascending: first age less than the previous
    return obj1.age - obj2.age;
});
    // Returns:  
    // [

jswhisperer

var mergeTo = [4,5,6],
var mergeFrom = [7,8,9];

Array.prototype.push.apply(mergeTo, mergeFrom);

mergeTo; // is: [4, 5, 6, 7, 8, 9]

jswhisperer

function howManyStringsInTheHouse(fullText, searchText){
  var regx = new RegExp(searchText,"g"),
      testResults = fullText.match(regx);
  if (testResults) { 
    return testResults.length; 
  }
  else 
    return "Nothing here man";
}

jswhisperer

// Boring
if (success) {
  obj.start();
} else {
  obj.stop();
}
 
// Hipster-fun
var method = (success ? 'start' : 'stop');
obj[method]();

jswhisperer

['first', 'name'].join(' '); // = 'first name';
 
['milk', 'coffee', 'suger'].join(', '); // = 'milk, coffee, suger'