John Macdonald wrote:

On Thu, Mar 17, 2005 at 09:18:45PM -0800, Larry Wall wrote:

On Thu, Mar 17, 2005 at 06:11:09PM -0500, Aaron Sherman wrote:
: Chop removes the last character from a string. Is that no longer useful,
: or has chomp simply replaced its most common usage?

I expect chop still has its uses.

I've had times when I wanted to be able to use chop at either end of a string.

(I long ago suggested a "chip" operator to chop from the front of
a string.  Using chip and chop on a string is much like using
shift and pop on an array.)

Generally when I do this I am not only deleting the character
from the string, but also moving it to another scaler to use;
so substr isn't a simple replacement because you'd have to
use it twice.  For chip, I use (perl5):

   # $ch = chip $str;
   $str =~ s/(.)//;
   $ch = $1;

   # can be written as:
   ($ch) = ($str =~ s/(.)//);

If chop is removed, a similar s/// can replace it.

With the advent of rules and grammars in p6, there will likely
be less need for chip/chop type operations so this huffman
extended use of subtr instead of chip/chop would be ok.

Actually, I think this can be handled by the "new view" type casting Larry was rumbling about. Simply re-view your string as an "Array of Chars", (bytes/codepoints/graphemes) and then pop or shift.

Let's see where that thread ends up first.

-- Rod Adams

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