From: kinfe0@... (Kinfe)
Date: 2002-01-08T23:40:02+09:00
Subject: Re: move index back ward in list.each do {}

Michael Kelly <mkelly2002NOSPAM@earthlink.net> wrote in message news:<8ebh3uo2vf863n1nevdup03ator64rd8l6@4ax.com>...
> On 5 Jan 2002 16:14:38 -0800, kinfe0@netscape.net (Kinfe) wrote:
> 
> >   At this point I would like to advance the next index in a.each but
> >remain in b.each, another word, b[4] will not become b[5] after the
> >a[had advance], how can I do ?
> 
> To alter indexes inside a loop I think generally
> it's better to use a while or some other simple
> loop with counters instead of trying to alter
> the behavior of an iterator.   A while loop
> like the one below with a few edits should
> do what you need
> 
> i = 0
> j = 0
> while (i < a.length) and (j < b.length)
>   if a[i] == b[j] # or some other condition
>     i += 1 # only advance one index
>     next
>   end
>   i += 1
>   j += 1
>   #do something on each loop
> end
> 
> 
> Mike


Thanks all, I found 'array.each_index' and it works.

Kinfe.