Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight

Re: split//; (Re^2: Golf: Sudoku solving)

by eyepopslikeamosquito (Chancellor)
on Jan 11, 2013 at 09:51 UTC ( #1012848=note: print w/replies, xml ) Need Help??

in reply to split//; (Re^2: Golf: Sudoku solving)
in thread Golf: Sudoku solving

For Perl up to and including 5.10, calling split in scalar or void context had the side-effect of setting @_. This mis-feature was removed in Perl 5.12. That was great news for most Perl programmers because this side-effect "feature" was unnecessary, an ugly wart. It was sad news for golfers though because side-effects are frequently useful in golf. In fact, I recently experienced a similar split annoyance in Compression in Golf: Part III, as described in the "Fun with split" section in that node.

Simply changing @_ to @z say should fix thospel's original solution at the cost of three strokes:

$_=$`.$_.$'.<>;@z=split//;${/[@z[map{$i-($i="@-")%9+$_,9*$_+$i%9,9*$_% +26+$i-$i%27+$i%9-$i%3}0..8]]/o||do$0}for/0/||print..9
I expect you could do better than that, though I haven't tried.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1012848]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (4)
As of 2018-05-25 21:18 GMT
Find Nodes?
    Voting Booth?