cache.js

// Cache a function's results by storing them. You may assume
// that the function only takes primitives as arguments.
//
// The function should return a function that, when called, will check if it has
// already computed the result and return that value instead if possible.
//
// Example:
// cacheAdd = myFunction(add);
// add(1,2) = 3
// cacheAdd(1,2) = 3 --> executes add function
// cacheAdd(1,2) = 3 --> returns from cache
// cacheAdd(2,2) = 4--> executes add function

function cacher() {};