I think I prefer your grep solution to the syntax you're asking for. Anyhow, the interior of for (@foo) {} doesn't know what position in the array $_ represents. You can do what you want with the indexes if you take them in reverse order to prevent splice from altering the yet-to-be-seen positions. 

for (reverse 0 .. $#moo) {
    splice @moo, $_, 1 if $moo[$_] % 2;
}

[download]
I imagine that all that splicing is less efficient than grep assignment. Notice that comparison with zero is unnecessary in the conditional.

This is not too different from your C style loop, but corrects its major flaw.

After Compline,
Zaxo

In reply to Re: Foreach for array pruning? by Zaxo
in thread Foreach for array pruning? by spandox

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