From: GOTO Kentaro <gotoken@...>
Date: 2008-07-12T12:27:10+09:00
Subject: Re: inject idiom

Hi Ömer,

On Sat, Jul 12, 2008 at 3:49 AM, عمر ملقب بالثانی
<bordelentoutgenre@googlemail.com> wrote:
> I wonder what the best practice is? The most readable and best suited to
> Ruby-style of programming.  In Perl, although there is more than one way
> to do every thing you want, there are definitely best practices. What
> about Ruby? How do one use the inject idiom best?

Do you like this?

doc = Hpricot(open("http://del.icio.us/"))
tags = doc.search("//div.hotlist/ol/li").inject({}){|hash,entry|
  hash[entry.search("h4/a[1]").first['href']] =
    entry.search("div/ul/li/a/*").to_a
  hash
}

I sometimes want a hash setter method returning the hash itself:

class Hash
  def set(key, value)
    self.store(key, value)
    return self
  end
end


HTH,

--
Gotoken