From: Robert Klemme <shortcutter@...>
Date: 2011-02-03T17:04:50+09:00
Subject: Re: loop, insdide do loop. do twice?

On Thu, Feb 3, 2011 at 7:57 AM, Bigmac Turdsplash <i8igmac@aim.com> wrote:
> mply = 0
> body = "just some data"
> proof = 100
> VALUE=""
> list = ['line1','line2','line3']
>
> foreach(list) do |block|
> while mply < 3

You can use #times for iteration.

>  puts mply.to_s+block+VALUE
>    if body.bytesize > proof
>      print("writing to log.html #{VAULE}")

Note that print does not append a line terminator (as puts does).

>    end
>    mply = mply + 1
>  end
>  mply = 0
> end
> VALUE="XXXX"

Reassigning a constant is a bad idea.

> # if you run this example above, you should see something printed like
> this
> # 0line1
> # 1line2
> # 2line3
>
>
> now what im trying to do could easly be done with just doubling this
> code but that is messy and i need to clean it up...
>
> how can i produce this output and keep things short and simple
> # 0line1
> # 0line1XXXX
> # 1line2
> # 1line2XXXX
> # 2line3
> # 2line3XXXX
>
> im in irc /server freenode #ruby if some one could help me or just
> respond here... this one has me scratching my head for a few days...

This all can be solved with nested iterations - you just need to stack
your loops appropriately: the outer loop iterates what changes most
infrequently ("list" in your example). The next inner loop must
iterated over next infrequent changing item etc.  Also, you can use
#each_with_index to get the index of each element in your list.

08:57:01 ~$ ruby19 x
0line1
0line1XXX
1line2
1line2XXX
2line3
2line3XXX
09:03:24 ~$ cat x
proof = 100
body = "just some data"

%w{line1 line2 line3}.each_with_index do |block, mypl|
  ['', 'XXX'].each do |suffix|
    puts "#{mypl}#{block}#{suffix}"
    puts "Writing to log.html #{suffix}" if body.bytesize > proof
  end
end
09:03:36 ~$

Cheers

robert

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