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You could combine the steps in your get_links() and sort_and_store() subroutines into one process.

knoppix@Microknoppix:~$ cat spw964070.in abc peter def jack ghi zak jkl ben mno mick pqr alan knoppix@Microknoppix:~$ perl -Mstrict -wE ' > open my $inFH, q{<}, q{spw964070.in} > or die qq{open: < spw964070.in: $!\n}; > open my $outFH, q{>}, q{spw964070.out} > or die qq{open: > spw964070.out: $!\n}; > > print $outFH > map { $_->[ 0 ] } > sort { $a->[ 2 ] cmp $b->[ 2 ] } > map { [ $_, split ] } > <$inFH>; > > close $inFH > or die qq{close: < spw964070.in: $!\n}; > close $outFH > or die qq{close: > spw964070.out: $!\n};' knoppix@Microknoppix:~$ cat spw964070.out pqr alan jkl ben def jack mno mick abc peter ghi zak knoppix@Microknoppix:~$

Sticking to your subroutines, it would be more efficient for get_links() to return a reference to @info than the huge array itself, like so:-

... return \ @links; } sub sort_and_store { my $refToLinks = get_links(); my @sorted_links = sort { $a->[1] cmp $b->[1] } @$refToLinks; ...

I hope these points are helpful.

Cheers,

JohnGG


In reply to Re^3: Sorting a "tuple" by the second value by johngg
in thread Sorting a "tuple" by the second value by thmsdrew

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