Function construct

demo/js/index.js:1850–1856

(F, len, args)

});

var construct = function(F, len, args){
  if(!(len in factories)){
    for(var n = [], i = 0; i < len; i++)n[i] = 'a[' + i + ']';
    factories[len] = Function('F,a', 'return new F(' + n.join(',') + ')');
  }
  return factories[len](F, args);
};

// 19.2.3.2 / 15.3.4.5 Function.prototype.bind(thisArg, args...)
$def($def.P, 'Function', {