From: Peter Fitzgibbons <Peter.Fitzgibbons@...>
Date: 2005-08-17T19:50:38+09:00
Subject: Re: Array manipulations questions

Hi.  Thanks Why and 'captn.

If I wanted to include the array A as a class-accessor, how would I
extend the three def's to the variable?

IE:

class GridMaster
  attr_accessor :grid

  def create_grid
    @grid = [ ... ]
  end
End

Irb>gm = GridMaster.new
Irb>gm.create_grid
Irb>gm.grid.row(1)
???



Peter J. Fitzgibbons
Applications Manager
Lakewood Homes - "The American Dream Builder"(r)
Peter.Fitzgibbons@Lakewoodhomes.net
(847) 884-8800 


-----Original Message-----
From: why the lucky stiff [mailto:ruby-talk@whytheluckystiff.net] 
Sent: Tuesday, August 16, 2005 7:01 PM
To: ruby-talk ML
Subject: Re: Array manipulations questions

Let's start with the easy stuff.

Peter Fitzgibbons wrote:
> A.row(1)
> ==> [10, 11, 20, 21]
>   
a[0]
=> [10, 11, 20, 21]

def a.row i
  at i-1
end
a.row 1
=> [10, 11, 20, 21]
> A.col(1)
> ==> [10, 12, 30, 32]
>
>
>   
a.transpose[0]
=> [10, 12, 30, 32]

def a.col i
  transpose[i-1]
end
a.col 1
=> [10, 12, 30, 32]

As far as the `grid' method goes, do you want it to always do a 2x2
square or are you looking for some other math here?

  def a.grid i
    i -= 1
    (0..1).map do |j|
      at(((i/2)*2)+j)[(i%2)*2,2]
    end
  end

_why