var obj, method;
obj = {
go: function() { console.log(this); }
};
(method = obj.go)()NOTE: Fyodor's first comment to his answer is what helped me the most. As the topic suggests, this was more about the parentheses than this.
In the last line, what I understand is that the parentheses will force the code inside to run first, so method takes the value of the go property, which is a function.
The () then calls that function, which logs window to the console because it wasn't called as a method.
If instead of (method = obj.go)(), you do method = obj.go(), it will first run the go function, and method will take the value returned by it. Since go returns nothing, it will be undefined. The value printed by go will be obj.
What I don't understand is, why if I do (obj.go)() the this printed is obj and not window?
Considering how the other code works, I expected this code to work kind of like this:
obj.go is evaluated first inside the parentheses and then the function is run as an IIFE (function() { console.log(this); })(). So since the function isn't called as a method of obj, the this defaults to window.
