new operator

function new(func, arguments) {

// Create a new object that inherits from the constructor's prototype.
// func is a constructor function.
// arguments is an array of arguments that
//     are used to invoke the constructor.

    var that = Object.create(func.prototype),

// Invoke the constructor, binding –this- to the new object.

        other = func.apply(that, arguments);

// If its return value is not an object, substitute the new object.

    return (typeof other === 'object' && other) || that;
}