The code below should do the trick.

use strict;
use warnings;

my $key;
my %data;

while (<DATA>) {
    chomp($_);
    my @data = split(/\s+/, $_);
    if ($data[0] =~ /^\%(.+)/) {
        $key = $1;
        shift(@data);
    }
    push(@{$data{$key}}, @data);
}

foreach my $key (keys %data) {
    print "$key: ", join(", ", @{$data{$key}}), "\n";
}

__DATA__
%key1 data1 data2
%key2 data3
data4 data5
%key3
data6 data7
data8 data9

[download]

Hope this helps, -gjb-

In reply to Re: push to a hash of arrays by gjb
in thread push to a hash of arrays by aennen

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