Implementation of the memory Cache using the javascript.

MemCache.js

/* 
  using the memCache using the javascript
  1. we are implementing to reduce the response time, no other data space is being used.
  2. Better approach to solve most of the clientside optimizaition. 
*/

function memCache(func){
  var cache = {};
  return function(){
      var key = JSON.stringify(arguments);
      if (cache[key]){
        return cache[key];
      } else {
        // call the fucnction with arguments and store the cache[key[ to val.
        val = func.apply(null, arguments);
        cache[key] = val;
        return val; 
      }
  }
};

// example using the factorial
var fib = memCache(function(n) {
  console.log("the val of n is",n);
  if(n>2){
    return 1;
  } else {
    console.log("loading will be seen only before the value will be not cached...");
    return fib(n-2) + fib(n-1);
  }
});

fib(10);
console.log('------');
fib(10);

// actual output.
the val of n is 10
loading will be seen only before the value will be not cached...
the val of n is 8
loading will be seen only before the value will be not cached...
the val of n is 6
loading will be seen only before the value will be not cached...
the val of n is 4
loading will be seen only before the value will be not cached...
the val of n is 2
loading will be seen only before the value will be not cached...
the val of n is 0
the val of n is 1
the val of n is 3
loading will be seen only before the value will be not cached...
{ '{"0":0}': 1, '{"0":1}': 1, '{"0":2}': 2 }
{ '{"0":0}': 1, '{"0":1}': 1, '{"0":2}': 2 }
the val of n is 5
loading will be seen only before the value will be not cached...
{ '{"0":0}': 1,
  '{"0":1}': 1,
  '{"0":2}': 2,
  '{"0":3}': 3,
  '{"0":4}': 5 }
{ '{"0":0}': 1,
  '{"0":1}': 1,
  '{"0":2}': 2,
  '{"0":3}': 3,
  '{"0":4}': 5 }
the val of n is 7
loading will be seen only before the value will be not cached...
{ '{"0":0}': 1,
  '{"0":1}': 1,
  '{"0":2}': 2,
  '{"0":3}': 3,
  '{"0":4}': 5,
  '{"0":5}': 8,
  '{"0":6}': 13 }
{ '{"0":0}': 1,
  '{"0":1}': 1,
  '{"0":2}': 2,
  '{"0":3}': 3,
  '{"0":4}': 5,
  '{"0":5}': 8,
  '{"0":6}': 13 }
the val of n is 9
loading will be seen only before the value will be not cached...
{ '{"0":0}': 1,
  '{"0":1}': 1,
  '{"0":2}': 2,
  '{"0":3}': 3,
  '{"0":4}': 5,
  '{"0":5}': 8,
  '{"0":6}': 13,
  '{"0":7}': 21,
  '{"0":8}': 34 }
{ '{"0":0}': 1,
  '{"0":1}': 1,
  '{"0":2}': 2,
  '{"0":3}': 3,
  '{"0":4}': 5,
  '{"0":5}': 8,
  '{"0":6}': 13,
  '{"0":7}': 21,
  '{"0":8}': 34 }
------
{ '{"0":0}': 1,
  '{"0":1}': 1,
  '{"0":2}': 2,
  '{"0":3}': 3,
  '{"0":4}': 5,
  '{"0":5}': 8,
  '{"0":6}': 13,
  '{"0":7}': 21,
  '{"0":8}': 34,
  '{"0":9}': 55,
  '{"0":10}': 89 }