gistfile1.txt

Function definition:
function (x, y, z) { }
=>
function (this, x, y, z) { }

Function call:
f(x, y, z);
=>
f(null, x, y, z);

Method call:
o.f(x, y, z);
=>
f(o, x, y, z);

Constructor call:
var o = new F(x, y, z);
=>
var o = {}; F(o, x, y, z);