#! perl -slw
use strict;
sub pairs {
map {
my $i = $_;
map [ @_[ $i, $_ ] ], $i+1 .. $#_;
} 0 .. $#_;
}
my %pairCounts;
++$pairCounts{ "@$_" } for map pairs( sort split ), <DATA>;
print "@$_" while @{ $_ = [ each %pairCounts ] };
__DATA__
dog monkey cat
cat ball stone
monkey iron cat zoo
Gives: C:\test>junk4
cat stone 1
cat monkey 2
iron monkey 1
cat zoo 1
dog monkey 1
monkey zoo 1
cat dog 1
ball cat 1
cat iron 1
iron zoo 1
ball stone 1
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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