Doesn't it already sort alphabetically? :)

You'll probably want to read about Schwartzian transform. Anyway, perhaps it will be clearer without pack

        last unless $line =~ m{
            ( [^(]+ )    # 1 anything except opening paren
            \s           #   space
            \(           #   opening paren
            ( \d+   )    # 2 number
        }x;

        push @entries, [ $2, $1, $line ];
        ...
        print map  { $_->[2] }
              sort {
                $a->[0] <=> $b->[0] # sort by $2
                ||                  # or if equal
                $a->[1] cmp $b->[1] # sort by $1
              }
              @entries;

[download]
Our @entries is an array of arrays. Each entry (inner array) has: For example, one entry looks like this: ['1', 'wrestling', 'wrestling (1)']

So, we first sort by '1', then by 'wrestling'. Or we can pack '1' and 'wrestling' in just one string and sort by that... that's just a neat trick :)

map simply extracts the line from entry.

In reply to Re^6: Use Perl's Sort to only sort certain lines in a file? by Anonymous Monk
in thread Use Perl's Sort to only sort certain lines in a file? by grahambuck

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