http://www.freecodecamp.com/kkas 's solution for Bonfire: Confirm the Ending

bonfire-confirm-the-ending#.js

// Bonfire: Confirm the Ending
// Author: @kkas
// Challenge: http://www.freecodecamp.com/challenges/bonfire-confirm-the-ending#
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function end(str, target) {
  // "Never give up and good luck will find you."
  // -- Falcor
  var subStrAry,
      subLen,
      targetAry,
      i;
  
  if (str.length < target.length) {
    return false;
  }
  
  subStrAry = str.substr(target.length * -1).split('');
  subLen = subStrAry.length;
  
  targetAry = target.split('');
  
  for(i = 0; i < subLen; i++) {
    if (subStrAry[i] !== targetAry[i]) {
      return false;
    }
  }
  
  return true;
}

end("Bastian", "n");