Javascript.md

Javascript vs Ruby

JavaScript has two ways of defining functions – function expressions (FE) and function declarations (FD)

//function declaration:
    function functionName(){
      //the code you want to execute
      alert("This is a function declaration!")
    }

function expression:
    var aDifferentFunction = function(){
      //the code you want to execute
      alert("This is a function expression!")
    }

Example Functions: or if you want to get into too much detail http://benalman.com/news/2010/11/immediately-invoked-function-expression/

Everything in JS acts like an object

Array

[1,2,3].toString(); 
=> "1,2,3"

hash

({name: "Ben}).toString();  
    => "[object Object]"

Object

var ObjOne = function(){
  this.sayHi = console.log("hi")
  };
    =>undefined
myObj = new ObjOne();
=> hi
=> ObjOne {sayHi: undefined}
myObj.toString();
=> "[object Object]"

Object.prototype

all objects inherit methods and properties from Object.prototype, but what is it?

callback: when a function gets passed to another function for future use.