Hi Experts, arr = [1, 2, 3, 5, 5, 2, 5] is that possible to find whats the count of an value inside an array "arr" for example 1 - 1 2 - 2 3 - 1 5 - 3 is that possible? plz help me guys, its my requirement for specific reasons. regards, Bala --~--~---------~--~----~------------~-------~--~----~ 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 29 Okt., 07:06, Bala <mbb...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> arr = [1, 2, 3, 5, 5, 2, 5] > is that possible to find whats the count of an value inside an array > "arr"One way could be something like this. arr = [1, 2, 3, 5, 5, 2, 5] counts = {} arr.each do |item| begin counts[item] = counts[item] + 1 rescue counts[item] = 1 end end counts.each {|k, v| puts "#{k}: #{v}"} But there probably is some more concise way. Lutz --~--~---------~--~----~------------~-------~--~----~ 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 Lutz,
I got it, but i tried in way using like this
class Array
def count
k=Hash.new(0)
self.each{|x| k[x]+=1 }
k
end
end
a = %w[N1100, N2200, N2200, N1100, N4400]
items = a.count
puts items.inspect
--~--~---------~--~----~------------~-------~--~----~
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
-~----------~----~----~----~------~----~------~--~---
Bala wrote:> Hi Lutz, > > I got it, but i tried in way using like this > > class Array > def count > k=Hash.new(0) > self.each{|x| k[x]+=1 } > k > end > end > > a = %w[N1100, N2200, N2200, N1100, N4400] > items = a.count > puts items.inspectinject is QUITE a powerful tool as well http://www.ruby-doc.org/core/classes/Enumerable.html#M003171 arr = [1, 2, 3, 5, 5, 2, 5] arr.inject(Hash.new(0)){|hsh,arr_elm| hsh[arr_elm]+=1 } worth checking out, a lot of functionality in a one-liner.. worth knowing exists, at the least. hth - shai -- 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 -~----------~----~----~----~------~----~------~--~---
Shai Rosenfeld wrote:> Bala wrote: >> Hi Lutz, >> >> I got it, but i tried in way using like this >> >> class Array >> def count >> k=Hash.new(0) >> self.each{|x| k[x]+=1 } >> k >> end >> end...btw, these types of questions (pure ruby vs ruby on rails) are great to ask on the ruby forum - that''s what it is for, and the real experts seem to lay around there (i''ve seen a DHH and even matz shmooze around there occasionally) -- 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 -~----------~----~----~----~------~----~------~--~---
Shai Rosenfeld wrote:> Shai Rosenfeld wrote: >> Bala wrote: >>> Hi Lutz, >>> >>> I got it, but i tried in way using like this >>> >>> class Array >>> def count >>> k=Hash.new(0) >>> self.each{|x| k[x]+=1 } >>> k >>> end >>> end > > ...btw, these types of questions (pure ruby vs ruby on rails) are great > to ask on the ruby forum - that''s what it is for, and the real experts > seem to lay around there (i''ve seen a DHH and even matz shmooze around > there occasionally)........................and, for example, a thread i''ve just found on the ruby-forum right at this moment - http://www.ruby-forum.com/topic/129613 - guess what it''s about ;p -- 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 -~----------~----~----~----~------~----~------~--~---
Thanks a lot Experts!!! it works perfectly. :) On Oct 29, 12:55 pm, Shai Rosenfeld <rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> Shai Rosenfeld wrote: > > Shai Rosenfeld wrote: > >> Bala wrote: > >>> Hi Lutz, > > >>> I got it, but i tried in way using like this > > >>> class Array > >>> def count > >>> k=Hash.new(0) > >>> self.each{|x| k[x]+=1 } > >>> k > >>> end > >>> end > > > ...btw, these types of questions (pure ruby vs ruby on rails) are great > > to ask on the ruby forum - that''s what it is for, and the real experts > > seem to lay around there (i''ve seen a DHH and even matz shmooze around > > there occasionally) > > ........................and, for example, a thread i''ve just found on > the ruby-forum right at this moment - > > http://www.ruby-forum.com/topic/129613 > > - guess what it''s about > ;p > -- > Posted viahttp://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 -~----------~----~----~----~------~----~------~--~---