Preserving a reference to “this” in JavaScript prototype functions [duplicate]

Answer 1

For your last MyClass example, you could do this:

var myThis=this;
this.elements.each(function() { myThis.doSomething.apply(myThis, arguments); });

In the function that is passed to each, this refers to a jQuery object, as you already know. If inside that function you get the doSomething function from myThis, and then call the apply method on that function with the arguments array (see the apply function and the arguments variable), then this will be set to myThis in doSomething.