From: ES <ruby-ml@...>
Date: 2005-10-23T02:27:30+09:00
Subject: Re: Unit testing an each function

Kevin Ballard wrote:
> Brian Schr�der wrote:
> 
>>Sorry, I do not see a better syntax. But I have to admit that I have
>>no idea what would be the result of
>>
>>[[(1..3), (5..8)], [(4..7), (2..6)]].each.each.each { |i| puts i }

This is *really* hard to read if you just see:

   @some_array.each.each.each {|i| puts i}

>>(Well if I think long enough, maybe you mean something like
>>
>>  [[(1..3), (5..8)], [(4..7), (2..6)]].each do | row |
>>    row.each do | range |
>>      range.each do |i| puts i end
>>    end
>>  end
>>
>>Which I would prefer about the "new" idiom, but other people may not.
> 
> 
> Yes, that is what the construct means. Each successive call is one
> deeper level of enumeration. If you understand what the nested
> enumeration semantics mean, then it's not hard to read.

You are also happily ignoring the non-enumerable confusion that this
may cause. Of course, this being a library, you are free to do as you
please.

E