Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask
 
PerlMonks  

Re^3: Sudoku puzzles solved using Regular Expressions

by GrandFather (Saint)
on Jun 30, 2005 at 05:36 UTC ( [id://471224]=note: print w/replies, xml ) Need Help??


in reply to Re^2: Sudoku puzzles solved using Regular Expressions
in thread Sudoku puzzles solved using Regular Expressions

I had a play with your code to try and fix the problem, but headed off in a much less elegant direction than you did by adding a $grid_c vector and another nested loop.

It got rather messy rather quickly. :-(


Perl is Huffman encoded by design.

Replies are listed 'Best First'.
Re^4: Sudoku puzzles solved using Regular Expressions
by ikegami (Patriarch) on Jun 30, 2005 at 05:42 UTC

    Yeah, there are diminishing returns to adding more shortcuts.

    Technically, $grid_v is not needed at all.

    return if index(substr($grid_v, $x*$size, $size), $n) >= 0;

    can be written as

    foreach my $y_ (0 .. $size-1) { return if substr($grid_h, $y_*$size+$x, 1) eq $n; }

    I just thought the former would be faster, even though we must constantly make copies of $grid_v in addition to $grid_h.

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://471224]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others goofing around in the Monastery: (6)
As of 2024-03-28 22:54 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found