Weblabor

Function.prototype.when = function(expression, scope) {
	if (expression) {
		return this.apply(scope);
	}
}

var FooBar = {

	init: function() {
		this.number = 5;
		this.number2 = this.addFive.when(this.number > 1, this);
		console.log(this.number2);
	},

	addFive: function() {
		console.log("Add five to " + this.number);
		return this.number + 5;
	}

}

FooBar.init();