I am trying to transform this piece of Python code into Perl:

  PCHR = ["K", "Q", "R", "B", "N", "P"]
  w1 = "QRKPNB"
  w2 = "".join(sorted(w1, key=PCHR.index)) # Translate this to Perl ..
+.
  print(w1 + " -> " + w2)

[download]

My current version is this:

  my $i = 0;
  use constant PCHR => split //, 'KQRBNP';
  my %pchr = map { $_ => $i++ } PCHR;
  my $w1 = 'QRKPNB';
  my $w2 = join '', sort { $pchr{$a} <=> $pchr{$b} } split //, $w1;
  print "$w1 -> $w2\n";

[download]

The output should be KQRBNP.

The Perl code works but compared to the Python version it looks a little bit awkward. Any ideas on how to pimp that up *without* writing a sorted() sub?

In reply to Sort list by position of items in another list by gflohr

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