snippet.txt

    goog.memoize = function(f, opt_serializer) {
      var functionHash = goog.getHashCode(f);
      var serializer = opt_serializer || goog.memoize.simpleSerializer;
  
      return function() {
        // Maps the serialized list of args to the corresponding return value.
        var cache = this[goog.memoize.CACHE_PROPERTY_];
        if (!cache) {
          cache = this[goog.memoize.CACHE_PROPERTY_] = {};
        }
        var key = serializer(functionHash, arguments);
        if (!(key in cache)) {
          cache[key] = f.apply(this, arguments);
        }
        return cache[key];
      };
    };