From: Trans <transfire@...>
Date: 2006-12-08T06:03:31+09:00
Subject: Re: [GOLF]: partitioning an array


ara.t.howard@noaa.gov wrote:
> On Thu, 7 Dec 2006, Martin DeMello wrote:
>
> > On 12/7/06, Robert Klemme <shortcutter@googlemail.com> wrote:
> >> Hash.new {|h,k| h[k]=[]}
> >
> > This is common enough that it deserves to be its own constructor, imo
> > - Hash.multi perhaps
>
> my own lib has
>
>    def Hash.list list_class = Array, *a, &b
>      Hash.new {|h,k| h[k] = list_class.new(*a, &b)}
>    end

    def Hash.new_by(o='[]')
      Hash.new {|h,k| h[k] = eval o}
    end

    Hash.new_by '[]'

T.