In message <[EMAIL PROTECTED]>
"Ed Mills" <[EMAIL PROTECTED]> wrote:
> Particularly useful for tied hashes using GDBM where the key is actually a
> compound key such as 'Tom Smith+Mycity+NY+13404' we could find all NY-ers
> using
>
> foreach (keys %h) {if (/\+NY\+/) {$h2{$_}=$h{$_}}
>
I now you all will kill me for this but here goes..
this is slow:
foreach (keys %h)
{if (/some regex/) {$h2{$_}=$h{$_}}
}
In other words, extract a new hash from an existing one by searching for
primary keys matching a regex. (Please don't get off on your solutions to
this or syntax c
