From: x1 <caldridge@...>
Date: 2005-12-24T09:16:49+09:00
Subject: Re: How to sort this hash?

Simon!!  That worked :-D   *huge grin*

If you don't mind me asking, have you had to use this before? I
wouldnt consider myself a top notch developer but between the ruby
docs and google searches, I would have never figured this out...

Any tips out how you did? Just.. development experience? Thanks again!!

On 12/23/05, x1 <caldridge@gmail.com> wrote:
> Thank you for the reply.
>
> I tried adding your suggestions but ended up with an error:
> >ruby array_test.rb
> array_test.rb:19:in `[]': cannot convert String into Integer (TypeError)
>         from array_test.rb:19
>         from array_test.rb:18:in `map'
>         from array_test.rb:18
>         from array_test.rb:17:in `sort_by'
>         from array_test.rb:17:in `each'
>         from array_test.rb:17:in `sort_by'
>         from array_test.rb:17
> >Exit code: 1
>
>
> The script is:
>
> --------------------------------------
>
> jobs = {
>                 "2231" => {"command" => "test_a.bash",
>                                 "start_time" => "20051211",
>                                 "stop_time" => "20051222"},
>                 "1131" => {"command" => "test_b.bash",
>                                 "start_time" => "20051011",
>                                 "stop_time" => "20051122"},
>                 "231" => {"command" => "test_c.bash",
>                                 "start_time" => "20051215",
>                                 "stop_time" => "20051227"}
>         }
>
> sort_keys = ["start_time", "stop_time"]
> jobs.sort_by do |job|
>         sort_keys.map do |key|
>                 job[key]
>         end
> end
>
> On 12/23/05, Florian Gro� <florgro@gmail.com> wrote:
> > x1 wrote:
> >
> > > Is it possible to sort the jobs hash below based on values such as
> > > command, start_time and stop_time?
> > >
> > > Ideally, sort_by would be dynamically provided and I would output the
> > > jobs entries based on the value defined for sort_by.
> > >
> > > sort_by = "start_time"  #<---- I'd like to use something like this to
> > > define which job is listed first
> > >
> > > jobs = {
> > >               "2231" => {"command" => "test_a.bash",
> > >                               "start_time" => "20051211",
> > >                               "stop_time" => "20051222"},
> > >               "1131" => {"command" => "test_b.bash",
> > >                               "start_time" => "20051011",
> > >                               "stop_time" => "20051122"},
> > >               "231" => {"command" => "test_c.bash",
> > >                               "start_time" => "20051215",
> > >                               "stop_time" => "20051227"}
> > >       }
> >
> > sort_keys = ["start_time", "stop_time"]
> > jobs.sort_by do |job|
> >    sort_keys.map do |key|
> >      job[key]
> >    end
> > end
> >
> > Note that this will only work as long as all sort_keys are present in
> > every job.
> >
> > You might want to check the documentation for Enumerable#sort_by, but
> > let me document the special thing in this case as well.
> >
> > sort_by's block can return multiple values as an Array. In that case it
> > will first sort by the first value then by the second one and so on.
> > This is used in the above sample where every job is sorted by the fields
> > representing the sort_keys on that specific job.
> >
> > --
> > http://flgr.0x42.net/
> >
> >
> >
>