From: Markus <markus@...>
Date: 2004-09-09T13:28:41+09:00
Subject: Re: [RCR] Unified type conversion framework

On Wed, 2004-09-08 at 21:17, Gavin Sinclair wrote:
> > Florian Gross wrote:
> >> Paul Brannan wrote:
> >>
> >>> I think you mean Hash[*anArray].  IMO, It's not totally unintuitive,
> >>> but it's not consistent with other conversions.
> >>
> >>
> >> Actually converting an assoc array to a Hash is done via
> >> Hash[*array.flatten]. I think that that is pretty low level. I'd
> >> prefer  something like Hash.from_assoc()
> >
> > At work we have Array#to_h in a library, it's really useful for things
> > like:
> >
> > db.select_all(...).map {|foo,bar| [foo,bar]}.to_h
> >
> > Sam
> 
> This is my approach (very similar) and I love it:
> 
>   require 'extensions/all'
>   db.select_all(...).build_hash { |foo, bar| [foo,bar] }
> 
> Gavin
> 

Well, as long as we're playing "show me yours and I'll show you mine," I
use (again, very similar):

   
module Enumerable
    def collect_hash
        result = {}
        each { |x| result[x] = yield(x) }
        result
        end
    end

and thus would write (for the initial):

  db.select_all(...).collect_hash { |foo, bar| bar }


-- Markus