[tauser02@gfmwsp02lds bin]$ cat x
use strict;
use warnings;
my %data;
while (<DATA>) {
my ($cluster, $unit) = split /\s+/;
push(@{$data{$cluster}}, $unit);
}
for my $cluster (sort keys %data) {
print $cluster, ' ', join(' ', @{$data{$cluster}}), "\n";
}
__DATA__
Cluster1 unit1
Cluster1 unit2
Cluster1 unit3
Cluster1 unit4
Cluster1 unit5
Cluster2 unit6
Cluster2 unit7
Cluster2 unit8
Cluster2 unit9
Cluster2 unit10
[tauser02@gfmwsp02lds bin]$ perl x
Cluster1 unit1 unit2 unit3 unit4 unit5
Cluster2 unit6 unit7 unit8 unit9 unit10
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