From: Jen <jen.bottom@...>
Date: 2011-03-18T06:45:05+09:00
Subject: Re: Replacing elements in an array?

Hello,

When I run
   puts @offspring.inspect

After populating it with copies of @board, but before attempting to 
replace the elements containing "_" the result is:

[[[0, 4, 5, 9, 8, 7, 6, 2, 1], [1, 9, 2, 6, 5, 4, 3, 8, 7], [8, 7, 6, 3, 
2, 1, 5, 4, 9], [5, 2, 9, 8, 1, 6, 4, 7, 3], [4, 3, 1, 7, 9, 2, 8, 5, 
6], [6, 8, 7, 5, 4, 3, 1, 9, 2], [2, 5, 3, 4, 6, 9, 7, 1, 8], [7, 1, 8, 
2, 3, 5, 9, 6, 4], [9, 6, 4, 1, 7, 8, 2, 3, 5]], [[0, 4, 5, 9, 8, 7, 6, 
2, 1], [1, 9, 2, 6, 5, 4, 3, 8, 7], [8, 7, 6, 3, 2, 1, 5, 4, 9], [5, 2, 
9, 8, 1, 6, 4, 7, 3], [4, 3, 1, 7, 9, 2, 8, 5, 6], [6, 8, 7, 5, 4, 3, 1, 
9, 2], [2, 5, 3, 4, 6, 9, 7, 1, 8], [7, 1, 8, 2, 3, 5, 9, 6, 4], [9, 6, 
4, 1, 7, 8, 2, 3, 5]], [[0, 4, 5, 9, 8, 7, 6, 2, 1], [1, 9, 2, 6, 5, 4, 
3, 8, 7], [8, 7, 6, 3, 2, 1, 5, 4, 9], [5, 2, 9, 8, 1, 6, 4, 7, 3], [4, 
3, 1, 7, 9, 2, 8, 5, 6], [6, 8, 7, 5, 4, 3, 1, 9, 2], [2, 5, 3, 4, 6, 9, 
7, 1, 8], [7, 1, 8, 2, 3, 5, 9, 6, 4], [9, 6, 4, 1, 7, 8, 2, 3, 5]], 
[[0, 4, 5, 9, 8, 7, 6, 2, 1], [1, 9, 2, 6, 5, 4, 3, 8, 7], [8, 7, 6, 3, 
2, 1, 5, 4, 9], [5, 2, 9, 8, 1, 6, 4, 7, 3], [4, 3, 1, 7, 9, 2, 8, 5, 
6], [6, 8, 7, 5, 4, 3, 1, 9, 2], [2, 5, 3, 4, 6, 9, 7, 1, 8], [7, 1, 8, 
2, 3, 5, 9, 6, 4], [9, 6, 4, 1, 7, 8, 2, 3, 5]]]

Let me know if you want me to send the rest of my code.

Jen.

On 17/03/11 17:03, Jes�s Gabriel y Gal�n wrote:
> On Thu, Mar 17, 2011 at 5:56 PM, Jen<jen.bottom@gmail.com>  wrote:
>> Hello,
>>
>> This question is following on from my post 'making an array of arrays?', but
>> as it is about replacing elements I have started a new thread.
>>
>> The reply to my last arrays related post did solve one problem, so thanks
>> very much for that!
>>
>> So, I now have an @offspring array that takes copies of @board (a sudoku
>> board) according to a population specified by the user.
>>
>> The aim is to populate all empty cells in @offspring with random numbers,
>> but for now I am just populating them with '9'.
>> Empty cells were represented by '")', but are now represented by '0'
>> Currently the population is fixed at 4, and my current code is:
>>
>>     def find_empty!
>>     #Loop through @offspring and where ever there is "_" put a random number.
>>     4.times do |i|
>>     if @offspring[i] == 0
>>     then @offspring[i] = 9
>>     end
>>     #For debugging with the test puzzle
>>     puts @offspring.inspect
>>     end
>>
>> When I print out offspring I expect the first element to be changed to 9, as
>> it was originally set to 0, this is however not the case. I'm sure I'm being
>> very dumb, but if someone could please point me in the right direction that
>> would be great.
>>
>> Note I have tried the same thing but using a for loop instead of the .times
>> method. This gave me the same results.
> Your method works, so maybe @offspring doesn't contain what you think.
>
> ruby-1.8.7-p334 :001>  def find_empty!
> ruby-1.8.7-p334 :002?>       #Loop through @offspring and where ever
> there is "_" put a random number.
> ruby-1.8.7-p334 :003>         4.times do |i|
> ruby-1.8.7-p334 :004>           if @offspring[i] == 0
> ruby-1.8.7-p334 :005?>           then @offspring[i] = 9
> ruby-1.8.7-p334 :006?>           end
> ruby-1.8.7-p334 :007?>         #For debugging with the test puzzle
> ruby-1.8.7-p334 :008>           puts @offspring.inspect
> ruby-1.8.7-p334 :009?>         end
> ruby-1.8.7-p334 :010?>    end
>   =>  nil
> ruby-1.8.7-p334 :011>  @offspring = [0,0,0,0]
>   =>  [0, 0, 0, 0]
> ruby-1.8.7-p334 :012>  find_empty!
> [9, 0, 0, 0]
> [9, 9, 0, 0]
> [9, 9, 9, 0]
> [9, 9, 9, 9]
>   =>  4
> ruby-1.8.7-p334 :013>  @offspring
>   =>  [9, 9, 9, 9]
>
> Can you add the inspecting puts at the beginning of the method and
> show us the result?
>
> Jesus.
>