Re: Ouch! Each! Reentrant it is not

That's a nice demonstration of remembered state with each. It can be a useful property to exploit for some kinds of iterators, but it's pretty fragile. As you say, calling keys on the hash resets the each state.

You can avoid the scalar op and a useless variable by just calling keys in scalar context:

    keys %hash and return "The key for 2 is $key\n"
        if $val == 2;
[download]

After Compline,
Zaxo

Comment on Re: Ouch! Each! Reentrant it is not Download Code

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Re^2: Ouch! Each! Reentrant it is not by Thilosophy (Curate) on Jul 15, 2005 at 03:01 UTC
You can avoid the scalar op and a useless variable by just calling keys in scalar context Taking it one step further, it seems you can also call it in void context (which is maybe more efficient): `if ($val == 2 ){ keys %hash; return "The key for 2 is $key\n"; }` [download]	[reply] [d/l]
Re^2: Ouch! Each! Reentrant it is not by greenFox (Vicar) on Jul 15, 2005 at 03:04 UTC
You can avoid the scalar op and a useless variable by just calling keys in scalar context: I'd want to see that documented in the code or someone will get bitten! `keys %hash; # reset each to beginning of hash return "The key for 2 is $key\n" if $val == 2;` [download] -- Murray Barton Do not seek to follow in the footsteps of the wise. Seek what they sought. -Basho	[reply] [d/l]