jQuery $.each() goes one index too far

tagArray = new Array('a','b','c');
$.each(tagArray, function(index, value) {
    i开发者_C百科f(typeof value == 'undefined')
        return false;
    console.log(index + " " + value); 

});

Given the above code, I get the following response: 0 a 1 b 2 c undefined

Why is $.each() going one index too far, also, why is my conditional failing this check?

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That code works fine, and if it was really going one index too far it would output (note the 3):

0 a
1 b
2 c
3 undefined

not

0 a
1 b
2 c
undefined

Here is a JSFiddle to prove to you that it works: http://jsfiddle.net/Paulpro/AhdMn/

You must be logging something later in your code that is undefined.