From: Xavier Noria <fxn@...>
Date: 2008-08-25T20:38:01+09:00
Subject: Re: indices of non nil elements in an array

On Mon, Aug 25, 2008 at 3:20 AM, Patrick Doyle <wpdster@gmail.com> wrote:

> a = []
> a[10] = "foo"
>
> a.nitems returns a count of the non-nil, items. What is the simplest
> way to return the indices of "a" that are not nil?

Not exactly what you ask, but in case it's actually what you are after
have a look at Array#compact.