use Perl

• de-aliasing? (Score:1)

  by mx.2000 (6123)

  Is this the perl-ish way to pass arguments by-value rather than by-alias?
  • Re:de-aliasing? (Score:2)

    by Ovid (2709)

    Bingo! I needed to delete select pairs of items from an import list, but I couldn't do this:

    # we don't simply splice out because we're iterating by index
    @_[ $i, $i + 1 ] = (undef, undef) if $some_condition;
    # and later
    @_ = grep { defined } @_;

    The array slice assignment gave me a "modification of read-only value" error, hence the @_ = @_; statement.

    It all feels rather clumsy, but it works.
    • Re:de-aliasing? (Score:2)

      by bart (450) <bart.lateur@pandora.be> on 2006.04.09 3:19 (#47056) Journal

      I sometimes do this:

      for (@_ = @_) {
          # Now it's safe to modify $_
          # and still leave the original passed arguments intact
          # for example:
          tr/ \n\t/ /s;
      }

      Sometimes you just don't need a new array.

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