binding "this" object to a function

bind.js

// binding "this" object only (function arguments are ignored)

if (!Function.prototype.bind) {
    Function.prototype.bind = function bind(thisObject) {
        var fun = this;
        return function() {
            fun.apply(thisObject, arguments);
        };
    };
}

test.js

// run it with `node test.js`
require('./bind.js')

function introduce() {
    console.log("My name is " + this.name);
}

var blake = {
    name: 'William Blake',
    occupation: 'painter'
};

var introduceBlake = introduce.bind(blake);

var caesar = {
    name: 'Julius Caesar',
    occupation: 'emperor'
};

var introduceCaesar = introduce.bind(caesar);

introduce();
introduceBlake();
introduceCaesar();