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comp.lang.ruby

[]= with moredimensional Arrays

naPOLeon

10/22/2006 4:02:00 PM

Hi all,

I want to code the "game of life" in ruby. I use a moredimensional
array as the field and another one to provide an easy way to input the
pattern of the start-population. (See the code below)
So my question is, whether there is a possibility to use ar[a..b][x..y]
= [[m, ...], [n, ...], ...]. That means, how can I merge two
2-dimensional arrays?

size = ARGV.first.to_i
field = Array.new(size, Array.new(size, 0))

thing = [[1, 1, 0, 1],
[1, 0, 1, 0],
[0, 0, 1, 0],
[1, 1, 0, 0]]

pos_x, pos_y = size/2, size/2

field[pos_x..(pos_x + thing.length)][pos_y..(pos_y + thing.length)] =
thing

Thanks,
naPOLeon
4 Answers

Paul Lutus

10/22/2006 4:14:00 PM

0

naPOLeon wrote:

> Hi all,
>
> I want to code the "game of life" in ruby. I use a moredimensional
> array

Define "Moredimensional". Do you mean multidimensional?

> as the field and another one to provide an easy way to input the
> pattern of the start-population. (See the code below)
> So my question is, whether there is a possibility to use ar[a..b][x..y]
> = [[m, ...], [n, ...], ...]. That means, how can I merge two
> 2-dimensional arrays?

Define "merge." Leave nothing to the imagination.

>
> size = ARGV.first.to_i
> field = Array.new(size, Array.new(size, 0))
>
> thing = [[1, 1, 0, 1],
> [1, 0, 1, 0],
> [0, 0, 1, 0],
> [1, 1, 0, 0]]
>
> pos_x, pos_y = size/2, size/2
>
> field[pos_x..(pos_x + thing.length)][pos_y..(pos_y + thing.length)] =
> thing

Well, you have succeeded in stating what you don't understand. Now, please,
just say what you want to accomplish. There is no question that you can do
it using Ruby.

--
Paul Lutus
http://www.ara...

naPOLeon

10/22/2006 4:30:00 PM

0

I'm sorry for my horrible English, I'm German.
Anyway, of course I meant multidimensional and I want to get e.g.

0000 10 0100
0000 and 01 to become 0010
0000 11 0110

The first Array is definded by Array.new(3, Array.new(4, 0)), the
others the same way.
I hope you understand the problem now.

Thanks,
naPOLeon

Paul Lutus

10/22/2006 7:17:00 PM

0

naPOLeon wrote:

> I'm sorry for my horrible English, I'm German.

Your English is much better than my German, so no problem. All we have to do
is figure out how to communicate the fine points of Ruby code, but without
any code.

> Anyway, of course I meant multidimensional and I want to get e.g.
>
> 0000 10 0100
> 0000 and 01 to become 0010
> 0000 11 0110
>
> The first Array is definded by Array.new(3, Array.new(4, 0)), the
> others the same way.
> I hope you understand the problem now.

From the appearance of your example, it appears that you want to replace the
contents of two middle columns in a 4x3 array with the contents of a 2x3
array. Yes?

#!/usr/bin/ruby -w

array1 = [
[ 0,0,0,0 ],
[ 0,0,0,0 ],
[ 0,0,0,0 ]
]

array2 = [
[ 1,0 ],
[ 0,1 ],
[ 1,1 ]
]

array1.each_index do |i|
array1[i][1 .. 2] = array2[i]
end

p array1

output:

[[0, 1, 0, 0], [0, 0, 1, 0], [0, 1, 1, 0]]

If this isn't what you had in mind, we'll have to try again.

--
Paul Lutus
http://www.ara...

naPOLeon

10/23/2006 7:44:00 AM

0

Thanks a lot, Paul! That's exactly what I was up to.
I started with Ruby two month ago, so still learning...

cu, naPOLeon