I thought I would comment because not one of the solutions given handle a reference to a reference. So here is my non-recursive solution. 

sub mychomp {
  while (@_) {
    for (shift) {
      push @_, grep {
        ref || eval { defined && chomp; 0 };
      } ref eq 'ARRAY'  ? @$_ :
        ref eq 'HASH'   ? values %$_ :
        ref eq 'SCALAR' ? $$_ :
        ref eq 'REF'    ? $$$_ :
        $_
    }
  }
}

[download]

Of course even this is not complete as there could be a reference to a GLOB, which could contain a SCALAR, HASH and ARRAY. But who would use those :)

In reply to Re: chomp any data structure recursively by gbarr
in thread chomp any data structure recursively by Juerd

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