Re: Find unmatched between an array and a hash

You can use nested greps.

my @result = grep { my $lang = $_; ! grep { $lang eq $_ } @employee } 
+keys %languages;
[download]

alternatively you can use Quantum::Superpositions

Comment on Re: Find unmatched between an array and a hash Download Code

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Re: Re: Find unmatched between an array and a hash by merlyn (Sage) on Feb 07, 2001 at 06:16 UTC
Please don't. That'll be `O(n**2)` inefficient. -- Randal L. Schwartz, Perl hacker	[reply]
(tye)Re: Find unmatched between an array and a hash by tye (Sage) on Feb 07, 2001 at 10:10 UTC
This isn't slick, but it is straight-forward and seems like it should be fairly fast: `my @result= do { my %temp; @temp{@employee}= (); grep ! exists $temp{$_}, keys %languages; }` [download] Then again, with Perl and an N of 6, I don't think O(N*N) is much of a problem. ;) - tye (but my friends call me "Tye")	[reply] [d/l]