Thanks to an earlier comment, I’ve updated the every() method of the zArray library to match what it should do (return true for an empty array). I also added a couple of other methods I found while digging through my old files: append(), which is logically equivalent to push(), and sum(), which returns the sum of all the items in the array (the sum can be a string or a number). The update brings zArray to version 1.1 and is available now in the Downloads section.

Disclaimer: Any viewpoints and opinions expressed in this article are those of Nicholas C. Zakas and do not, in any way, reflect those of my employer, my colleagues, Wrox Publishing, O'Reilly Publishing, or anyone else. I speak only for myself, not for them.