Calling .unbind() from within a callback skips next callback

[aron]

Because .trigger() is iterating over the array of callbacks when a callback unbinds itself .splice() modifies the array and the it's length decreases by one so the next callback in line is skipped.

In the following example we unbind function B in it's own callback. We would expect "ABC" to be output but instead we only get "AB".

var e = new MicroEvent();

e.bind('change', function A() { console.log('A'); });
e.bind('change', function B() { console.log('B'); e.unbind('change', B); });
e.bind('change', function C() { console.log('C'); });

e.trigger('change'); //=> Expect A B C, but C is not called.

There are at least two solutions, clone the array in either the .trigger() or .unbind() methods. [].slice() will do this.

[aron]

I've created a patch here to fix the issue should you want it. https://gist.github.com/8e281e63aa2fa0fcdbf8