Re: RFC 76 (v1) Builtin: reduce

[Glenn Linderman]

Clever, and really obscure; wouldn't this then require that _everyone_ that
writes a curried expression for the sort sub use ^a & ^b, and that everyone
writing a non-curried sort sub name their parameters a and b?  I guess that
wouldn't necessarily be bad, but it would be restrictive.

Damian Conway wrote:

> Larry pointed out:
>
>    > Yes, but has anyone pointed out that
>    >
>    >    @out = sort ^b cmp ^a, @in;
>    >
>    > won't do what people will certainly think it ought to?
>
> It *will*, if C<sort> *names* the two values it passes to the
> comparator!
>
> E.g.:
>
>             sub sort (^&comparator, @list) {
>                 for (1..@list**3) {
>                     my ($i, $j) = (rand(@list), rand(@list));
>                     @list[$i,$j] = @list[$j,$i]
>                         unless $comparator->(a: $list[$i], b: $list[$j]);
>                 }
>                 return @list;
>             }
>
> (And now you know why I never fill in the IMPLEMENTATION section ;-)
>
> Damian

--
Glenn
=====
There  are two kinds of people, those
who finish  what they start,  and  so
on...                 -- Robert Byrne


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