From: Daniel Carrera <dcarrera@...>
Date: 2003-02-28T06:08:17+09:00
Subject: Re: 'each' returning array

Would Array#map do what you want?

>> %w{ H A L }  
=> ["H", "A", "L"]
>> %w{ H A L }.map {|x| (x[0]+1).chr}
=> ["I", "B", "M"]



On Fri, Feb 28, 2003 at 06:01:31AM +0900, Wojciech Kaczmarek wrote:
> A newbie problem:
> 
> Is there a way to transparently accumulate expresions evaluated within
> a block into an array, without introducing an external variable? For
> example, I'd like to write something like this:
> 
> "HAL".each_byte__returning_array {|x| (x+1).chr} .collect # more processing
> 
> ...instead of this:
> 
> l=[];  "HAL".each_byte {|x| l<< (x+1).chr};  l.collect #...
> 
> One of my first impressions with ruby was the surprise that each*
> method family doesn't return such accumulated arrays just for method
> chaining.
> 
> Am I thinking totally non-rubyish? ;-) If so, please show me the Right
> Way..
> 
> -- 
> He who foos last foos best
> 

-- 
Daniel Carrera
Graduate Teaching Assistant.  Math Dept.
University of Maryland.  (301) 405-5137