From: James Edward Gray II <james@...>
Date: 2005-06-19T05:01:48+09:00
Subject: Re: Newbe questions...

On Jun 18, 2005, at 2:50 PM, Chuck Brotman wrote:

> In Ruby Is there a prefered (or otherwise elegant) way to do an  
> inner &
> outer loop with two variables?
>
> eg in psedocode:
>
>   for i=1 to 3
>      {for j =  4 to 6
>          print i,j, i*j,\nl}

I don't personally have a problem with the way you show it right  
there.  I'm not aware of a significantly better way.

> would print something like
> 1,4,4
> 1,5,5
> 1,6,6
> 2,4,8
> 2,5,10
> 2,6,12
> 3,4,12
> 3,5,15
> 3,6,18
>
> Also,how would you generate the same output using the each iterator?

irb(main):007:0> (1..3).each do |i|
irb(main):008:1*   (4..6).each do |j|
irb(main):009:2*     puts "#{i} * #{j} = #{i * j}"
irb(main):010:2>   end
irb(main):011:1> end
1 * 4 = 4
1 * 5 = 5
1 * 6 = 6
2 * 4 = 8
2 * 5 = 10
2 * 6 = 12
3 * 4 = 12
3 * 5 = 15
3 * 6 = 18
=> 1..3

Hope that helps.

James Edward Gray II