From: w_a_x_man@...
Date: 2009-02-13T03:23:45+09:00
Subject: Re: Arrays and Hashes processing :pls help

On Feb 12, 10:58 am, Jags Rao <aquaj...@yahoo.com> wrote:
> hi friends
>
> i have a long array with structure like this
>
> [["377", "838"],
>  ["377", "990"],
>  ["377", "991"],
>  ["377", "992"],
>  ["378", "840"],
>  ["378", "841"],
>  ["378", "842"],
>  ["378", "843"],
>  ["378", "844"]]
>
> how can i convert it in one line to
>
> [["377", "838 990 991 992"],
>  ["378", "840 841 842 843 844"]]
>
> if thats diificult is the below array processable in one line
>
> [{"prefix"=>"838", "scf_id"=>"377"},
>  {"prefix"=>"990", "scf_id"=>"377"},
>  {"prefix"=>"991", "scf_id"=>"377"},
>  {"prefix"=>"992", "scf_id"=>"377"},
>  {"prefix"=>"840", "scf_id"=>"378"},
>  {"prefix"=>"841", "scf_id"=>"378"},
>  {"prefix"=>"842", "scf_id"=>"378"},
>  {"prefix"=>"843", "scf_id"=>"378"},
>  {"prefix"=>"844", "scf_id"=>"378"}]
>
> in this form
>
> [{"prefix"=>"838 990 991 992", "scf_id"=>"377"},
>  {"prefix"=>"840 841 842 843 844", "scf_id"=>"378"}]
>
> pls help
> Jags
> --
> Posted viahttp://www.ruby-forum.com/.

a = [["377", "838"],
 ["377", "990"],
 ["377", "991"],
 ["377", "992"],
 ["378", "840"],
 ["378", "841"],
 ["378", "842"],
 ["378", "843"],
 ["378", "844"]]
h=Hash.new{[]};a.each{|x,y|h[x]+=[y]};h.map{|x,y|[x,y.join(" ")]}
    ==>[["377", "838 990 991 992"], ["378", "840 841 842 843 844"]]