script.js

var args = process.argv.slice(2);

var hero = {
    name: args[0],
    getSecretIdentity: function (){
        return this.name;
    }
};

var stoleSecretIdentity = hero.getSecretIdentity.bind(hero);

console.log(stoleSecretIdentity());
console.log(hero.getSecretIdentity());

// node script.js bruce-wayne