Mercurial > boosterpack

annotate filter.pl @ 2:d7dd496a4fa6 boosterpack

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[svn r4] actual functionality!
author robert
date Tue, 08 Sep 2009 02:45:26 -0400
parents
children 8c6d2ce90677
rev   line source
robert@2 1 sub filter
robert@2 2 {
robert@2 3
robert@2 4 $ref = shift;
robert@2 5 @list = @_;
robert@2 6 my @ret = ();
robert@2 7
robert@2 8 for $element(@list)
robert@2 9 {
robert@2 10 if ($ref->($element))
robert@2 11 {
robert@2 12 push @ret, $element;
robert@2 13 }
robert@2 14 }
robert@2 15
robert@2 16 return @ret
robert@2 17
robert@2 18 }
robert@2 19
robert@2 20
robert@2 21
robert@2 22
robert@2 23 @test = (1,2,3,4,5,6);
robert@2 24
robert@2 25 sub even
robert@2 26 {
robert@2 27 return ($_[0]%2 == 0);
robert@2 28 }
robert@2 29
robert@2 30 @rr = &filter(\&even, @test);
robert@2 31
robert@2 32 print "@rr";