Does it make sense to use .apply( ) and pass the same instance as context?

Question

I\'m reading Javascript Web Applications, from O\'Reilly. At various points in the book, the author uses something along the following:

instance.init.apply(insta         


        

Answer 1

Using apply() in that example insures that 'this' === instance, instead of DOMWindow if instance.init() is executed from another function/expression.

var x = function(){ debugger; },
    y = function(){ x.apply(x, arguments); },
    z = function() { x(arguments); };

y("abc", true, []); // this === x
z("abc", true, []); // this === DOMWindow

It's simply specifying context.