From: Axel Etzold <AEtzold@...>
Date: 2008-05-06T04:39:07+09:00
Subject: Re: Help with array


-------- Original-Nachricht --------
> Datum: Tue, 6 May 2008 04:06:01 +0900
> Von: "Victor Reyes" <victor.reyes@gmail.com>
> An: ruby-talk@ruby-lang.org
> Betreff: Help with array

> Team,
> 
> On my never ending saga to learn Ruby, I am trying to write a program to
> solve Sudoku puzzles.
> Given a multidimensional array (9x9) I am trying to inspect each row and
> each column as follows:
> 
> Assume the following represents a typical row in my 9x9 array:
> 
>   *Row***
> 
> 23
> 
> 689
> 
> 7
> 
> 12345689
> 
> 1359
> 
> 9
> 
> 2468
> 
> 359
> 
> 235
>   Row
> 23
> 689
> 7
> 12345689
> 1359
> 9
> 2468
> 359
> 235
>  Row
> 
> 23
> 
> 689
> 
> 7
> 
> 12345689
> 
> 1359
> 
> 9
> 
> 2468
> 
> 359
> 
> 235
> 
>  Row
> 23
> 689
> 7
> 12345689
> 1359
> 9
> 2468
> 359
> 235
> Furthermore, assume the following is a typical column:
> 
>   *Column***
> 
> 23
> 
> 689
> 
> 7
> 
> 12345689
> 
> 1359
> 
> 9
> 
> 2468
> 
> 359
> 
> 235
>   I would like to be able to count the frequency of each digit on either
> row
> or column, separate of course!
> 
>   *Number***
> 
> 1
> 
> 2
> 
> 3
> 
> 4
> 
> 5
> 
> 6
> 
> 7
> 
> 8
> 
> 9
> 
> *Frequency***
> 
> 2
> 
> 4
> 
> 5
> 
> 2
> 
> 4
> 
> 3
> 
> 1
> 
> 3
> 
> 5
> 
> I can do this with some ugly looking and probably inefficient loop.
> However,
> Ruby has so many tools and "tricks" that perhaps there might be some way
> of
> doing this quicker and easy to understand.
> 
> Any help will be greatly appreciated!
> 
> Thank you
> 
> Victor

Dear Victor,

one nice feature of the Ruby list is its quiz contest.
You can have a look at different solution proposals for solving
Sudokus here:


http://www.rubyquiz.com/quiz43.html

Best regards,

Axel 
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