From: Robert Klemme <shortcutter@...>
Date: 2012-12-08T19:04:44+09:00
Subject: Re: if n belongs to set a and m belongs to set b repeat some steps, How?

On Sat, Dec 8, 2012 at 6:05 AM, zubair a. <lists@ruby-forum.com> wrote:
> We can do so in java and similar languages like:
>
> for (int i=0, int j=3; i<=2 && j<=5;i++,j++){
>   do some repetive task until the condition becomes false...
> }
>
> how to keep these two conditions based on two different sets(suppose two
> arrays whose indexes can be used as i and j) in condition block??
>
> some working code would be greatly appreciated..thanks in advance..

In this particular case it's totally useless to use two variables in
the loop condition - regardless of programming language.

0.upto 2 do |i|
  j = i+3
  ...
end

for i in 0..2
  j = i+3
  ...
end

Best approach depends on your actual use case.  Can you give a more
concrete example of what you are trying to achieve?

Cheers

robert


--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/