functional vs imperative

gistfile1.js

// from http://kriszyp.name/2010/01/16/imperative-functional-and-declarative-programming/

// imperative
function bestPrices(inputArray){
  var outputArray = [];
  for(var i = 0; i < inputArray.length; i++){
    if(inputArray[i].price<10){
      outputArray.push(inputArray[i]);
    }
  }
  return outputArray;
}

//functional
function bestPrices(inputArray){
  return Array.filter(inputArray, function(value){
    return value.price < 10;
  });
}