Sorry for double posting this on the Ruby section, I realized this is kind of a rails question since it might relate to ActiveSupport. Is there any prettier or cleaner way to write x = [x] unless x.is_a?(Array) I''ve looked into Array() and hash.to_a, but these will not give the intended result as above. Thanks in advance. -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Aryk Grosz wrote:> Sorry for double posting this on the Ruby section, I realized this is > kind of a rails question since it might relate to ActiveSupport. > > Is there any prettier or cleaner way to write > > x = [x] unless x.is_a?(Array) > > I''ve looked into Array() and hash.to_a, but these will not give the > intended result as above. > > Thanks in advance. >I''m curious if someone can do better, but here''s mine... x = [x].flatten disclaimer: won''t give desired results on multi-dimensional arrays. -- http://www.5valleys.com/ http://www.workingwithrails.com/person/8078 --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
You can use Array().>> a = [1]=> [1]>> b = 2=> 2>> Array(a)=> [1]>> Array(b)=> [2]>>- Gabe On Mon, Mar 10, 2008 at 5:17 PM, Jon Garvin <jgarvin.lists-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > Aryk Grosz wrote: > > Sorry for double posting this on the Ruby section, I realized this is > > kind of a rails question since it might relate to ActiveSupport. > > > > Is there any prettier or cleaner way to write > > > > x = [x] unless x.is_a?(Array) > > > > I''ve looked into Array() and hash.to_a, but these will not give the > > intended result as above. > > > > Thanks in advance. > > > I''m curious if someone can do better, but here''s mine... > > x = [x].flatten > > disclaimer: won''t give desired results on multi-dimensional arrays. > > -- > http://www.5valleys.com/ > http://www.workingwithrails.com/person/8078 > > > > >--~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
On Mar 10, 2008, at 3:15 PM, Aryk Grosz wrote:> > Sorry for double posting this on the Ruby section, I realized this is > kind of a rails question since it might relate to ActiveSupport. > > Is there any prettier or cleaner way to write > > x = [x] unless x.is_a?(Array) > > I''ve looked into Array() and hash.to_a, but these will not give the > intended result as above. > > Thanks in advance.x = [*x] Cheers- - Ezra Zygmuntowicz -- Founder & Software Architect -- ezra-NLltGlunAUd/unjJdyJNww@public.gmane.org -- EngineYard.com --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Hey guys, Thanks for the responses. I don''t think any of those quite work. Here is a sample from irb:>> hash = {:x => {:y => :z}}=> {:x=>{:y=>:z}}>> [hash]=> [{:x=>{:y=>:z}}] # what im trying to get>> [*hash]=> [[:x, {:y=>:z}]]>> hash.to_a=> [[:x, {:y=>:z}]]>> Array(hash)=> [[:x, {:y=>:z}]] Now, if I was going to do hash.each {|k,v|}, i dont think this would matter, but we can''t assume thats always the case. -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
What does het asterisk mean? Never seen that before... On Mar 10, 11:31 pm, Ezra Zygmuntowicz <ezmob...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> On Mar 10, 2008, at 3:15 PM, Aryk Grosz wrote: > > > > > Sorry for double posting this on the Ruby section, I realized this is > > kind of a rails question since it might relate to ActiveSupport. > > > Is there any prettier or cleaner way to write > > > x = [x] unless x.is_a?(Array) > > > I''ve looked into Array() and hash.to_a, but these will not give the > > intended result as above. > > > Thanks in advance. > > x = [*x] > > Cheers- > > - Ezra Zygmuntowicz > -- Founder & Software Architect > -- e...-NLltGlunAUd/unjJdyJNww@public.gmane.org > -- EngineYard.com--~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Hi -- On Tue, 11 Mar 2008, LeonB wrote:> What does het asterisk mean? Never seen that before...It "unwraps" an array into a list of values. array = [1,2,3] [array] # => [[1,2,3]] [*array] # => [1,2,3] It also flows the other way, especially in method parameter syntax: def m(*args); end m(1,2,3) The list 1,2,3 will be wrapped in the array args. The fact that args is an array also means that it doesn''t care whether or not it''s empty. Thus it represents optional arguments (unlike a plain parameter, which doesn''t already represent an object and therefore needs an argument matched to it). David -- Upcoming Rails training from David A. Black and Ruby Power and Light: ADVANCING WITH RAILS, April 14-17 2008, New York City CORE RAILS, June 24-27 2008, London (Skills Matter) See http://www.rubypal.com for details. Berlin dates coming soon! --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
> > x = [*x]> What does het asterisk mean? Never seen that before... It''s the splat operator. See: * http://ola-bini.blogspot.com/2006/11/nooks-and-crannies-of-ruby.html * http://redhanded.hobix.com/bits/theSiphoningSplat.html * http://redhanded.hobix.com/bits/wonderOfTheWhenBeFlat.html * http://www.softiesonrails.com/2007/9/18/ruby-201-weird-hash-syntax Alain --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
I thought it was only used in method arguments... Thanks! ________________________________________ From: rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org [rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org] On Behalf Of David A. Black [dblack-0o/XNnkTkwhBDgjK7y7TUQ@public.gmane.org] Sent: 11 March 2008 15:44 To: rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org Subject: [Rails] Re: shortcut for x = [x] unless x.is_a?(Array) Hi -- On Tue, 11 Mar 2008, Alain Ravet wrote:> > > > x = [*x] > > What does het asterisk mean? Never seen that before... > > It''s the splat operator.Or, as I prefer to call it, the unar[r]ay (unary unarray) operator :-) David -- Upcoming Rails training from David A. Black and Ruby Power and Light: ADVANCING WITH RAILS, April 14-17 2008, New York City CORE RAILS, June 24-27 2008, London (Skills Matter) See http://www.rubypal.com for details. Berlin dates coming soon! --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Hi -- On Tue, 11 Mar 2008, Alain Ravet wrote:> > > > x = [*x] > > What does het asterisk mean? Never seen that before... > > It''s the splat operator.Or, as I prefer to call it, the unar[r]ay (unary unarray) operator :-) David -- Upcoming Rails training from David A. Black and Ruby Power and Light: ADVANCING WITH RAILS, April 14-17 2008, New York City CORE RAILS, June 24-27 2008, London (Skills Matter) See http://www.rubypal.com for details. Berlin dates coming soon! --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
None of these methods, including the unarray operator seem to be doing the trick:>> hash = {:x => {:y => :z}}=> {:x=>{:y=>:z}}>> [hash]=> [{:x=>{:y=>:z}}] # what im trying to get>> [*hash]=> [[:x, {:y=>:z}]]>> hash.to_a=> [[:x, {:y=>:z}]]>> Array(hash)=> [[:x, {:y=>:z}]] All the other methods break up the hash into key/value pairs, I still want the hash intact. So are there any shortcuts for " x = [x] unless x.is_a?(Array) " when x is a Hash? -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ 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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Would it make sense to overwrite the #to_a function for Hash.
So instead of
h = { "c" => 300, "a" => 100, "d" => 400,
"c" => 300 }
h.to_a » [["a", 100], ["c", 300], ["d", 400]]
It would be:
h = { "c" => 300, "a" => 100, "d" => 400,
"c" => 300 }
h.to_a » [{ "c" => 300, "a" => 100, "d"
=> 400, "c" => 300 }]
What would this break? You can still do the hash.each{|k,v|} with this.
What am I missing?
--
Posted via http://www.ruby-forum.com/.
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