From: Paul Mckibbin <pmckibbin@...>
Date: 2011-03-04T11:28:05+09:00
Subject: Re: How to make copies of array that do not impact on the original?

Jen wrote in post #985279:
> Hi,
>
> I'm trying to make a sudoku solver that uses genetic algorithms in Ruby.

> make copy of board in to board i
> end
> I want to end up with my copies named board1, board2 etc, depending on
> the value of 'i' when the array is created from the original.
> If I could do this in a simpler way with blocks please let me know.
>
> Thanks in advance for any suggestions.

Wouldn't it be better to have arrays of boards rather than copies with 
names like board1, board2 etc.
I'd do something like

original_board=[1,2,3,4,5,6]
board=[]
n.times {board << original_board.dup}

If the array contents are more comples (e.g. references to objects), 
then dup won't be good enough, but if it is primitives you are storing, 
that will make a copy.

Paul

-- 
Posted via http://www.ruby-forum.com/.