Class.Reimplement

A Class.Refactor alternative. Removes the need for an extra wrapper that sets and unsets the 'previous' method which could overshadow an existing property if you aren't careful.

How to Use

Pass in an object that is key/function pairs. Reimplement will then run the function in the key/function(initializer) pair passing in the previous function(previousMethod). The initializer function should return a function(newMethod) that uses the previousMethod however it wants.

Syntax

myClass.reimplement({
	someExistingMethod: function(original){
		return function() {
			//do something before
			original();
			//do something after
		}
	}
});

Example

var P = new Class({
		initialize: function() {
				console.log('initializing');
		},
		doStuff: function(){
				console.log('doing stuff!');
		}
});

var a = new P();
a.doStuff();


P.reimplement({
		
		doStuff: function(func){
				return function(){
						console.log('before doing stuff');
						func();
						console.log('after doing stuff');
				};
		}
		
});

a.doStuff();