Question about `this`

[Jazear Brooks]

Consider the following function assignment:

var EventEmitter = require("events").EventEmitter;

EventEmitter.prototype.once = function(type, callback) { var that = this;

    this.on(type, function listener() {
        that.removeListener(type, listener);
        callback.apply(that, arguments);


}); };

Also consider the following two variables:

var a = new EventEmitter
var b = new EventEmitter.prototype

Does the `this` on line 5 of the first code section refer to variables a, b, or both?  Is variable b even declared legally?

[greelgorke]

'this' the same as 'a'. Your declaration of b is weird lead to an error, because EventEmitter.prototype is an object.

[Jazear Brooks]

Great, thanks