From: Tony Arcieri <tony@...>
Date: 2009-06-15T05:32:39+09:00
Subject: Re: each by arity

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On Sun, Jun 14, 2009 at 1:37 PM, Joel VanderWerf <vjoel@path.berkeley.edu>wrote:

> What would it do with
>
> [ [1,2], [3,4] ].each {|x,y| ... }
>

One iteration, with:

x = [1,2]
y = [3,4]

This could be expanded out with:

[ [1,2], [3,4] ].each {|(a,b),(c,d)| ... }

and

[ [1,2], [3,4] ].each {|(x,y)| ... }

still provides the old behavior.

This effectively provides the same behavior as each_slice, without the need
for a separate function, and having the "n" argument of each_slice "implied"
in the arity of the block.

These are the cool little bits of syntactic sugar I love to see in Ruby, but
I often find trying to do things with subtle little idiosyncrasies can make
code confusing.

each_slice is a lot clearer.

-- 
Tony Arcieri
medioh.com

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