block6.js

function sayName() {
	console.log(this.name);
}

var obj = {
	name: 'Adrian'
};

var sayObjName = function hardBind() {
	sayName().call(obj);
}

sayObjName(); // "Adrian"
setTimeout(sayObjName, 200); // "Adrian"
sayObjName.call(window); // "Adrian"
``` 

In the example we explicitly bind `sayName()` to `obj` but implemented hard binding. In this case, hard binding happens when we invoke `sayObjName()` and at the same time it invokes `hardBind()` and will now forcibly bind `sayName()` with `obj`. So no matter what we do with `sayObjName()` at a later time, `sayName()` applies to `obj`.

In fact, hard binding is so common there is already a built-in method called `Function.prototype.bind()`. The `bind()` method is used like before but with different syntax:

```js
function sayName() {
	console.log(this.name);
}

var obj = {
	name: "Adrian"
};

var sayObjName = sayName.bind(obj);

sayObjName(); // "Adrian"