http://www.freecodecamp.com/mattnwa 's solution for Bonfire: Chunky Monkey

bonfire-chunky-monkey.js

// Bonfire: Chunky Monkey
// Author: @mattnwa
// Challenge: http://www.freecodecamp.com/challenges/bonfire-chunky-monkey
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function chunk(arr, size) {  
  var temp = [];

  for(var i = 0; i < arr.length; i){
    temp.push(arr.slice(i, i+=size));
  }
  return temp;
}
chunk(["a", "b", "c", "d"], 2);