http://www.perlmonks.org?node_id=11131511


in reply to extracting only those keys with uniq values in array list

Every reply you have received so far has a different interpretation of your requirements. If you are lucky, someone will correctly guess what you intend and post a solution. However, I recommend that you restate the problem in a way that we can all understand without guessing. Note that the word 'unique' can be ambiguous. It can mean 'values that only occur once' or 'the first occurrence of each value'. The function List::Util#uniq which you reference assumes the latter.
Bill
  • Comment on Re: extracting only those keys with uniq values in array list

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Re^2: extracting only those keys with uniq values in array list
by v15 (Sexton) on Apr 20, 2021 at 14:08 UTC
    I agree with you. I edited the question so hopefully it makes more sense. Thanks
      Thanks for the clarification. Build the hash exactly as you show. Process the keys with grep
      use strict; use warnings; my %r_name = ( a => [ 1, 2 ], b => [ 3, 3 ], c => [ 1, 6 ], ); my @result = grep {$r_name{$_}[0] eq $r_name{$_}[1]} keys %r_name; print @result, "\n";

      Result

      b

      Note for next time: It is considered impolite to edit your post in a way that invalidates existing replies. Leave the existing text. Add a clearly marked UPDATE section.

      Bill