Re: grep value in hash

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Re^2: grep value in hash by davorg (Chancellor) on Feb 20, 2006 at 12:58 UTC
I can't see how `scalar @art` could ever return a negative number, so your `>0` check is probably overkill. `print "found" if scalar @ary;` [download] But, given that grep in scalar contents returns the number of matches, I'd probably skip the temporary value and use: `print "found" if grep { /one/ } values %hash;` [download] Oh, and using a regex to match a fixed string is inefficient. `print "found" if grep { $_ eq 'one' } values %hash;` [download] And we're pretty much back to my first solution :) -- <http://dave.org.uk> "The first rule of Perl club is you do not talk about Perl club." -- Chip Salzenberg	[reply] [d/l] [select]

Replies are listed 'Best First'.

Re^2: grep value in hash
by davorg (Chancellor) on Feb 20, 2006 at 12:58 UTC

I can't see how scalar @art could ever return a negative number, so your >0 check is probably overkill.

print "found" if scalar @ary;
[download]

But, given that grep in scalar contents returns the number of matches, I'd probably skip the temporary value and use:

print "found" if grep { /one/ } values %hash;
[download]

Oh, and using a regex to match a fixed string is inefficient.

print "found" if grep { $_ eq 'one' } values %hash;
[download]

And we're pretty much back to my first solution :)

"The first rule of Perl club is you do not talk about Perl club."
-- Chip Salzenberg