Shawn H Corey wrote:
Parag Kalra wrote:
# cat sort.pl
my $column_number = 2; # Sorting by 3rd column since 0-origin based
my $prev = "";
for (
map { $_->[0] }
sort { $a->[1] cmp $b->[1] }
map { [$_, (split)[$column_number]] }
map { [$_, (split)[$column_number]] . " $_" }
<>
) {
print unless $_ eq $prev;
$prev = $_;
}
If you are going to use concatenation then you really don't need to use
array references:
for (
map +(split( "\0", $_, 2 ))[1],
sort
map +(split)[$column_number] . "\0$_",
<>
) {
print unless $_ eq $prev;
$prev = $_;
}
John
--
The programmer is fighting against the two most
destructive forces in the universe: entropy and
human stupidity. -- Damian Conway
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