Javascript_good_parts.js

Javascript_good_parts.js

/* 
*   default function param value
*/

var getOuterWidth = function(Elem, Width, Padding){
  //assigning default value
  Width = Width || 0;
  Padding = Padding || 0; 
  //...
}

/*
*   immediate invocation/excution function
*   http://stackoverflow.com/questions/6719089/javascript-anonymous-function-immediate-invocation-execution-expression-vs-dec
*   "If function is the first keyword on the line, the parser will interpret the rest of the line as a function declaration."
*/
// 1.
(function(){ return 65535; })(); //65535

// 2.
!function(){ return false; }(); //true

// 3. excute function immediately after declaration, giving params and assigning result value to lefthand.
var addResult = function(num1, num2){ return num1+num2 }( 1, 10 );  

console.log(addResult); // 11