From: Logan Capaldo <logancapaldo@...>
Date: 2005-05-22T07:34:32+09:00
Subject: join not in Enumerable

Just a few minutes ago I was playing with irb as I am wont to do, and
typed this:

('a'..'z').join(' ')

Lo and behold it protested at me with a NoMethodError. I said to my
self, self there is no reason that has to be Array only functionality.
Why isn't it in Enumerable? So I said:

module Enumerable
       def join(sep = '')
            inject do |a, b|
                     "#{a}#{sep}#{b}"
            end
        end
end

And then I said ('a'..'z').join(' ') and got:
=> "a b c d e f g h i j k l m n o p q r s t u v w x y z"

#inject has to be the most dangerously effective method ever. But I digress:

Why is join, and perhaps even pack in Array and not in Enumerable?