This is nice, except I have one small quibble. You have used map in a void context, with side effects. I usually avoid doing this, as I think it adds nothing over an equivalent for loop, other than obfuscation. So, I'd change:

    when 1  { @loop[0].map:{ yield [$^first] }; yield undef }

[download]

To:

    when 1  { for @loop[0] { yield [$^first] } yield undef }

[download]

Much like similar circumstances in Perl 5, not only is the for loop shorter (update: shorter only due to the semicolon, but shorter nonetheless), I also think it's clearer. The less superfluous syntax we use, the better. :-)

Update: based on the replies, I perhaps should have added a disclaimer. This post is about style and based on my personal preferences. I was not arguing in terms of performance or functionality, merely in terms of style. My personal style preference is to favor alternatives with fewer syntax characters, all else being equal. That's the essence of what I was trying to convey.

In reply to Re^2: Perl6 Contest #2: P6 That Doesn't Look Like P5 by revdiablo
in thread Perl6 Contest #2: P6 That Doesn't Look Like P5 by Limbic~Region

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