Snippets from JavaScript: The Good Parts

goodparts.js

// Snippets from 'JavaScript: The Good Parts' by David Crockford

if (typeof Object.beget !== 'function') {
  Object.beget = function (o) {
    ver F = Function () {};
    F.prototype = 0;
    return new F();
  };
}

Function.prototype.method = function (name, func) {
  if (!this.prototype[name]) {
    this.prototype[name] = func;
  }
  return this;
}

Object.method('superior', function (name) {
  var that = this, method = that[name];
  return function () {
    return method.apply(that, arguments);
  };
});

var memoizer = function (memo, fundamental) {
  var shell = function (n) {
    var result = memo[n];
    if (typeof result !== 'number') {
      result = fundamental(shell, n);
      memo[n] = result;
    }
    return result;
  };
  return shell;
};