From: yermej <yermej@...>
Date: 2008-01-25T00:24:57+09:00
Subject: Re: Change a data structure

On Jan 24, 9:06 am, Michael Schmarck <michael.schma...@here.la> wrote:
> yermej <yer...@gmail.com> wrote:
> > I'll offer up an inject version (mostly for novelty's sake):
> > timing_given.each {|k, v| timing_given[k] = v.inject(Hash.new {|h, k|
> > h[k] = []}) {|acc, h| h.each {|k, v| acc[k] << v}; acc}}
>
> Geez - did you use to code perl code? Because Perl code tends to
> be as unreadable and compact as yours :)

Yes, I've used Perl in the past, but my penchant for inject is rooted
in Scheme.

> It works good, but I guess I've got some reading to do, to actually
> understand why it's working ;->

This might help, though some would say it's better just to avoid
inject entirely:

timing_given.each do |test_type, test_data|
  timing_given[test_type] =
    test_data.inject(Hash.new {|h, k| h[k] = []}) do |new_hash,
old_hash|
      old_hash.each do |data_field, data_value|
        new_hash[data_field] << data_value
      end
      new_hash
    end
end