Referencing a Prototype.js function from a function inside 'initialize'

Question

In the following JavaScript code, from inside function(elem) {..., how do I reference the reachMe function ? I am just trying to attach a listener to elem so that reachMe gets called when elem gets clicked.

If I replace whatHereToMeanTheReachMeFunction with this it doesn't work because there this is the window object. If instead I put reachMe there I get the error Uncaught TypeError: Cannot read property 'bindAsEventListener' of undefined.

var MyClass = Class.create();

MyClass.prototype = {

    initialize : function(spec) {

        $$('*[id^=prefix]').each(

            function(elem) {

                elem.observe('click', whatHereToMeanTheReachMeFunction.bindAsEventListener(this));
            }
        );
    },

    reachMe : function(event) {

        console.log("Here I am.");
    }

}

Answer 1

I made a few tweaks to your code and hopefully this will help you out

var MyClass = Class.create({
    //The class can be defined in one fell swoop
    initialize : function(spec) {
        $$('*[id^=prefix]').each(

            function(elem) {

                //you should only need normal bind() here
                elem.observe('click',this.reachMe.bind(this));
            },this
            //include 'this' here to set the context inside the each method
         );

        //you could also do the above action like this, 1 observer vs multiple
        document.on('click','*[id^=prefix]',this.reachMe.bind(this));

    },

    reachMe : function(event) {

        console.log("Here I am.");
    }

}