Function memoize

MathBox/mathbox-bundle.js:40693–40707

* Creates a function that memoizes the result of `func`. If `resolver` is * provided it will be used to determine the cache key for storing the result * based on the arguments provided to the memoized function. By default, the * first argument provided to the memoized function is used

(func, resolver)

     * // => { 'name': 'penelope', 'age': 1 }
     */
    function memoize(func, resolver) {
      if (!isFunction(func)) {
        throw new TypeError;
      }
      var memoized = function() {
        var cache = memoized.cache,
            key = resolver ? resolver.apply(this, arguments) : keyPrefix + arguments[0];

        return hasOwnProperty.call(cache, key)
          ? cache[key]
          : (cache[key] = func.apply(this, arguments));
      }
      memoized.cache = {};
      return memoized;
    }

    /**
     * Creates a function that is restricted to execute `func` once. Repeat calls to