gmane.comp.lang.ruby.rails

paco.onrails | 18 Jul 17:17

create an array from a hash that includes key and value


Hello there, I have the hash:

@hash = {"a"=>"1", "b"=>"2", "c"=>"3"}

And I need to create an array:

@array = [ ['a','1'],['b','2'],['c','3'] ]

How do I do that?

Paco Reyes

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group.
To post to this group, send email to rubyonrails-talk@...
To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@...
For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

headers

Thorsten Müller | 18 Jul 17:33

Re: create an array from a hash that includes key and value


@hash.to_a
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group.
To post to this group, send email to rubyonrails-talk@...
To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@...
For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

headers

David A. Black | 18 Jul 19:04

Re: create an array from a hash that includes key and value


Hi --

On Fri, 18 Jul 2008, paco.onrails wrote:

>
> Hello there, I have the hash:
>
> @hash = {"a"=>"1", "b"=>"2", "c"=>"3"}
>
> And I need to create an array:
>
> @array = [ ['a','1'],['b','2'],['c','3'] ]
>
> How do I do that?

@hash.to_a

David

--

-- 
Rails training from David A. Black and Ruby Power and Light:
   Intro to Ruby on Rails  July 21-24      Edison, NJ
   Advancing With Rails    August 18-21    Edison, NJ
See http://www.rubypal.com for details and updates!

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group.
To post to this group, send email to rubyonrails-talk@...
To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@...

(Continue reading)

headers

Rob Biedenharn | 18 Jul 19:55

Re: create an array from a hash that includes key and value

On Jul 18, 2008, at 11:19 AM, paco.onrails wrote:
> Hello there, I have the hash:
>
> @hash = {"a"=>"1", "b"=>"2", "c"=>"3"}
>
> And I need to create an array:
>
> @array = [ ['a','1'],['b','2'],['c','3'] ]
>
> How do I do that?
>
> Paco Reyes

Either:
   @array = @hash.to_a

or:
   @array = @hash.to_a.sort

depending on whether the order matters.  A Hash (in Ruby 1.8.6 and  
earlier) is inherently unordered and the conversion to an array gives  
elements in the same order that @hash.each would yield them.

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@...

--~--~---------~--~----~------------~-------~--~----~

(Continue reading)

headers

KathysKode-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org | 19 Jul 17:37

Re: create an array from a hash that includes key and value

Rob,
Could I ride this thread with a short variation? I have a zillion
dropdowns in my project that ask users what code they should choose.
As a ficticious example they'd be asked what day of the week ( 1 -
Sunday, 2 - Monday, 3 - Tuesday, etc. )
I'd like to simply create this as an array and pass it to my
collection_select helper. This would save me having to create another
model and migration.
What throws me is that the first member of an array has a zero 0 key
and I want it to be one 1.
Could someone show me the simple way to load an array with key - value
combinations that starts with one 1.
Thank you,
Kathleen

On Jul 18, 11:55 am, Rob Biedenharn <R...@...>
wrote:
> On Jul 18, 2008, at 11:19 AM, paco.onrails wrote:
>
> > Hello there, I have the hash:
>
> > @hash = {"a"=>"1", "b"=>"2", "c"=>"3"}
>
> > And I need to create an array:
>
> > @array = [ ['a','1'],['b','2'],['c','3'] ]
>
> > How do I do that?
>

(Continue reading)