comment on

Thanks for answering my last question about sorting multiple arrays by the same order. I've gotten out of so many jams with solutions from Perl monks and I appreciate it. My question now is about sorting 2 dimentional arrays. say I have the following:

  @myarray = (
               ['one','two','three','four'],
               ['first','second','third','fourth'],
               ['jim','bob','bill','sally'],
             );
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and I want to sort it by by the nth index. I can do this:

  @myarray = sort {$a->[$n] cmp $b->[$n]} @myarray;
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but instead of doing all that, let's say I wanted to sort this array multiple times, and instead of wasting CPU power, I wanted to record the order to an array instead. I can do that with a one dimensional array doing the following:

  my @arraylist = sort {$myarray[$a] cmp $myarray[$b]} 0..$#myarray;
  for $listitem (@arraylist) {
    print $myarray[$listitem];
  }
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but how do I refer to an array reference, like in a 2d array with this? So that I can do this:

  for $listitem (@arraylist) {
    print $myarray[$listitem][0] . "<br>";
    print $myarray[$listitem][1] . "<br>";
    print $myarray[$listitem][2] . "<br>";
  }
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Thanks again for all your help. _{edited by ybiC: rename from "Another silly sorting question" to facilitate search}

In reply to Sorting two dimensional arrays by toonski

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