apply.js

var obj1 = { name:'Alice' };
var obj2 = { name:'Bob' };
function say(talk, age) {
    console.log(talk + ', I am ' + this.name + ', ' + age + ' years old.');
}

say.apply(obj1, ['Hi', 12]);  // "Hi, I am Alice, 12 years old."
say.apply(obj2, ['Good morning', 36]);  // "Good morning, I am Bob, 36 years old."