Javascript: Memoization Example

memoization.js

// Simple Memoization - could use some work
function addMe(num){
  return num+num;
}

function memoMe(fn){
  var objs = {};
  return function(x){
    if(x in objs)
    {
      console.log(x + ' was pulled from cache');
    }
    else
    {
      objs[x] = fn.apply(this, arguments);
      console.log(x + ' was added to cache');
    }
    return objs[x];
  };
}

var test = memoMe(addMe);

console.log("Answer: " + test(5));
console.log("Answer: " + test(5));
console.log("Answer: " + test(10));
console.log("Answer: " + test(6));
console.log("Answer: " + test(6));
console.log("Answer: " + test(10));