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Re: Re: Pe(a)rls in line noise

by liz (Monsignor)
on Sep 15, 2003 at 08:12 UTC ( #291510=note: print w/replies, xml ) Need Help??

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    @; = (491036,8051555,4785250,3341086,912133,189089,691108);
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    ================================= ==================================
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    $:{do} = 'to';
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    eval '$:{q?'.$_.'?}=~s'.shift@; for keys(%;);
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    $_ = qq{@{[@:{qw{ He didn't do it }}]}};

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[tobyink]: *in your grep block
[tobyink]: You can use grep { $_ =~ /.*$in.*/; } @my_modules but why not stick to grep(/.*$in.*/, @my_modules)? (The latter is faster.)
[shmem]: Lady_Aleena, in the first example grep evaluates the result from grep and if true, returns $_. In the second, it always returns $_
[shmem]: ..the result from the pattern match
[Lady_Aleena]: tobyink, I did after I failed to get the BLOCK to work. I can't seem to get my brain around grep BLOCK, though I'm okay with grep EXPR.
[shmem]: so in the second example grep returns all true elements of the list passed
[Lady_Aleena]: Okay, so grep BLOCK is not like map BLOCK where something might need to be returned at the end.
[tobyink]: grep { $_ =~ /.*$in.*/; } @my_modules should work just fine. The problem is that you were adding on ;$_ at the end of the block. Why were you doing that?
[Lady_Aleena]: tobyink, I was thinking map.
[tobyink]: Something does need to be returned at the end not $_ though. You need to return (something that will be evaluated as) a boolean.

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