From: Michael Neumann <mneumann@...>
Date: 2004-10-21T04:09:36+09:00
Subject: Re: each with separator

On Thu, Oct 21, 2004 at 03:54:17AM +0900, Phil Tomson wrote:
> In article <20041020180532.GA1126@miya.intranet.ntecs.de>,
> Michael Neumann  <mneumann@ntecs.de> wrote:
> >Hi,
> >
> >I know we had a similar thread in the past about first/last-element
> >detection.
> >
> >In Smalltalk there's #do:separateBy: which basically works like
> >each+join combined, but in an imperative fashion.
> >
> >Now I tried to implement:
> >
> >  [1,2,3].separate_by { puts "-" }.each {|obj| 
> >    puts obj
> >  }
> >
> >desired output:
> >
> >  1
> >  -
> >  2
> >  -
> >  3
> >
> 
> Well, it's not exactly the general-purpose solution you're looking for, 
> but I would do it like this:
> 
> [1,2,3].join("\n-\n").each {|i| puts i }

Yes of course, but it's not imperative and I'm looking for an imperative
version like the Smalltalk one.

Regards,

  Michael