iife.js

// http://benalman.com/news/2010/11/immediately-invoked-function-expression/

// defining functions

// 1. function declaration
function f1() {
  console.log('i do declare');
}

// 2. function expression
var f2 = function(foo) {
 console.log('expre$$ed ' + foo); 
}

// invoking functions
f1();
f2('foo'); // -> expre$$ed foo

// "privacy"
function talkingDog() {
  var name = 'wilfred';
  
  return function() {
      console.log('Sup I\'m a dog named ' + name);
  }
}

var wilfred = talkingDog();
wilfred(); // -> Sup I'm a dog named wilfred

// enter IIFE
(function(){ /* code */ }());
(function(){ /* code */ })();

// example without arg
var wilfred = (function() {
   var name = 'wilfred';
  
   return {
    speak: function() {
      console.log('my name is ' + name);
    }
   }
})();

wilfred.speak(); // -> my name is wilfred

// example with arg
var friend = (function(first, last) {
   return {
    greet: function() {
      console.log('greetings! i\'m ' + first + ' ' + last);
    }
   }
})('ted', 'mosby');

friend.greet(); // -> hey i'm ted mosby

// in our code
// using it: https://github.com/nicheinc/Website/blob/master/app/actions/user/init-user-action.js
// could use it: https://github.com/nicheinc/Website/blob/dev/app/utils/scroll-utils.js#L114-L129

// https://github.com/nicheinc/Website/blob/feature/sherlock-refactor/app/utils/scroll-utils.js#L113-L126