Re: Re: array_last_key() function

Em Sat, 14 Jul 2012 04:04:27 +0200, Anthony Ferrara <ircmaxell@gmail.com> escreveu:

I like this idea. array_first_key would be nice too I am probably missing something, but what those would allow to do that rewind/end+key() doesn't do?

The big thing that it does that end()+key() doesn't do is really what it doesn't do (update the internal pointer). end() modifies the array pointer. So if you try this in user-land: function array_last_key(array $array) {

    end($array);
    return key($array);

} It will always force a full copy of the array (at least the hash table). Implementing this as a core function however would eliminate that one side-effect...

Why is the last key special? Why not a function to get the first or the penultimate key? Of course, there is one aspect where the first and last keys are special -- if you have some algorithm where you pop or shift the array successively. But in that case the argument about end() + key() having side effects is irrelevant because you are changing the array anyway. -- Gustavo Lopes