From: "Erik Bågfors" <erik@...>
Date: 2001-08-08T02:35:00+09:00
Subject: [ruby-talk:19302] Re: Some remarks from a nembie in Ruby

On 06 Aug 2001 22:06:48 +0900, Chris Moline wrote:
> On Mon, Aug 06, 2001 at 05:24:47PM +0900, Renaud HEBERT wrote:

> > 8) Between
> > 	[ 1, 2, 3, 5 ].each {|val| print val, " " }
> > and
> > 	foreach val in ([ 1, 2, 3, 5 ]) {print val, " " }
> > I find that the second is much more intuitive: It reads nearly as en
> > English sentence.
> > The first one is "pushed" quite heavily in the book, but isn't very
> > readable IMHO.
> 
> I agree but I have never been able to get foreach to work in my scripts. They
> always fail with parse errors. Is it really allowed in ruby?? I would much
> prefer foreach to for since it "reads" better.
> 

: [bagfors@detrius]$ ; ruby -e 'a=[1,2,3,4]; for b in a; p b; end'
1
2
3
4

I like each better though. Also remember that with blocks/iterators you
can do other stuff like each_second or each_pair and stuff like that.
You can't really do that easily with for/foreach...

for example
[1,2,3,4].each_second do |x| puts x end -> 2,4

With for-loops that would be
for x in [1,2,3,4].get_every_second
  p x
end

I think the first one is more easy to read and understand.

BTW, I made up each_second and get_every_second :)

/Erik 


-- 
Erik B�gfors               | erik@bagfors.nu
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