From: Simon Strandgaard <neoneye@...>
Date: 2005-10-22T05:09:17+09:00
Subject: Re: array in hash... argh!!

On 10/21/05, Simon Strandgaard <neoneye@gmail.com> wrote:
> On 10/21/05, Marco <z@a.b> wrote:
> [snip]
> > and i wold like to get 3 hashes like tese:
> >
>
>
> h = {
>     "title"=>["ciccio", "test", "ciccio panza"],
>     "id"=>["3", "4", "1"],
>     "description"=>["1", "", "hey?"],
>     "insert_date"=>["2005-10-19", "2005-10-20", "2005-10-18"]
> }
>
> vals = h.map{|k,v| v}.transpose
> keys = h.map{|k,v| k}
> ary_of_pairs = vals.map{|ary| keys.zip(ary)}
> res = ary_of_pairs.map{|pairs| Hash[*pairs]}
> puts res.map{|hash| hash.inspect }.join("\n")

a bit shorter..

res = h.values.transpose.map{|ary| h.keys.zip(ary)}.map{|pairs| Hash[*pairs]}


> =begin
> output:
>
> {["title", "ciccio"]=>["id", "3"], ["description",
> "1"]=>["insert_date", "2005-10-19"]}
> {["description", ""]=>["insert_date", "2005-10-20"], ["title",
> "test"]=>["id", "4"]}
> {["title", "ciccio panza"]=>["id", "1"], ["description",
> "hey?"]=>["insert_date", "2005-10-18"]}
>
> =end
>
> --
> Simon Strandgaard
>