Fellow Monks
First of all, this is not homework. I have a real problem behind this and can send full source code of my (unpublished) TWiki's MessageBoardPlugin if you want to see it.

My problem is optimization. I'm sure that using @_ instead of copying functions args to scopped variables is faster, and need to use this here: 

# inputBox( $url, $msgid, $action, \%data )
sub inputBox{
  my $data = $_[3];
  # some code here...
  # some processing here...
  return $result . map this($_),
    # hash de-ref and slicing at the same time...
    # however, can't do this with $_[3], syntax error.
    @$data{'a','b','c','d'};

[download]

I would like to use $_[3] instead of $data, but I can't, it generates a syntax error.

So what I need is a way to slice a de-referenced hash in just one shot. Any sugestions?

Thank you very much for your help.

-- monsieur_champs

In reply to Trying to optimize de-referenced hash slice without scope variables... by monsieur_champs

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