From: Eric Schwartz <emschwar@...>
Date: 2003-06-07T06:07:47+09:00
Subject: Re: [RCR] join block

Joel VanderWerf <vjoel@PATH.Berkeley.EDU> writes:
> Somehow, I would expect Array#join to pass two args to the block, like this:
> 
>     [1,2,3].join {|x,y| x < y ? " < " : " >= " }
> 
>      # ==> "1 < 2 < 3"

I can't figure out how that would happen.  I'd think you'd end up
rather with something more like "1 < 2 2 < 3" or something equally
weird.  My guess is you're implicitly assuming some sort of folding
operation going on behind the scenes which is not (to my mind) implied
by 'join'.

Array#join({block}) seems to me like it should behave as the OP
described: yield every element to {block}, and catenate the results.

-=Eric
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