memo-strip2.js

//Knowing that we have access to whatever 
//the user inputs into our function expression, we then write...   
return function(){     
     var key = JSON.stringify(arguments);
     if (cash[key]){
      return cache[key];
     }
    
    else{
      //apply() comes in handy here and will simply 
      //return the value of the function it calls
      val = func.apply(this, arguments);
      //then we set the value of the function to the key(argument).
      //The next time the function runs, 
      //if the argument is the same, we simply return 
      //the value without having to have the function execute.
      cash[key] = val;
      return val;
    }
}

https://gist.github.com/rayinla/2a2460b807a095b124aaca7646ead065#file-memo-strip2-js-L5 $$$

@rayinla There is typo in above gist

if (cash[key]){} should be
if (cache[key]){}

similarly in else condition. See cash[key] = val;

https://gist.github.com/saurbhc/675d1330e339b9418c2ebf8632d9b0b2 Fixed typo