http://www.freecodecamp.com/duggiemitchell 's solution for Bonfire: Falsy Bouncer

bonfire-falsy-bouncer.js

// Bonfire: Falsy Bouncer
// Author: @duggiemitchell
// Challenge: http://www.freecodecamp.com/challenges/bonfire-falsy-bouncer
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function bouncer(arr) {
  var falsyArr = [];
  
  var trueArr = arr.filter(Boolean);
     return (trueArr);
 } 
    

console.log(bouncer([7, "ate", "", false, 9]));

After spending an hour on this I find that Boolean constructor is also a function that returns either true for 'thruthy' and false for 'falsy' argument. I just saved about 5 lines of code thanks @elado for your blog post simplifying what seemed at first more difficult.