Any way to modify 'this' in JavaScript?

Question

I found this answer: How to modify "this" in javascript

But I did not like it. Surely there must be a way to somehow modify this?

Answer 1

See: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures

Simple types (except objects and arrays) is immutable. You can't modify it and save in source variable.

function foo() {
    this.val+=10;
}

a=function(obj) {
    a=foo.bind(obj);
}

But you can wrap it into object. See: http://jsfiddle.net/5dhm8fsn/