hi all,
i took the desired numbers from the string in datatbase collum
(str=1500,my sql,date 2500,my sql,date)
by str.scan method i got the numbers in a string array(eg="1500"
"2500")
now in the controllere method when i do the addition by of this array
elemts by method
hi=str.scan(/^(\d+)/)
num = hi.inject(0){|sum, element|(sum.to_i)+(element.to_i)}
it gives error
''undefine method to_i''
plssssss help
also can ny1 tell me any other alternative to the abov methode to add
all the elements of the array
--
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
-~----------~----~----~----~------~----~------~--~---
hi,
irb(main):001:0> str="1500,my sql,date 2500,my sql,date"
=> "1500,my sql,date 2500,my sql,date"
irb(main):002:0> hi=str.scan(/^(\d+)/)
=> [["1500"]]
irb(main):005:0> hi[0]
=> ["1500"]
irb(main):006:0> hi[0].to_i
NoMethodError: undefined method `to_i'' for ["1500"]:Array
from (irb):6
irb(main):007:0> hi[0][0].to_i
=> 1500
irb(main):008:0>
the problem is you are getting arrays of arrays
i just modified some part of your code
1)hi=str.scan(/(\d+)/)
2)hi.inject(0){|sum, element|(sum.to_i)+(element[0].to_i)}
i also did
irb(main):016:0> hi=str.scan(/(\d+)/).flatten
=> ["1500", "234", "2500"]
irb(main):017:0> hi.inject(0){|sum, element|(sum.to_i)+(element.to_i)} #your
code
=> 4234
i hope this helps
regards
gaurav
--~--~---------~--~----~------------~-------~--~----~
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
-~----------~----~----~----~------~----~------~--~---
Prashant Jadhav wrote:> hi all, > > i took the desired numbers from the string in datatbase collum > (str=1500,my sql,date 2500,my sql,date) > by str.scan method i got the numbers in a string array(eg="1500" > "2500") > > now in the controllere method when i do the addition by of this array > elemts by method > > hi=str.scan(/^(\d+)/) > num = hi.inject(0){|sum, element|(sum.to_i)+(element.to_i)} > > it gives error > ''undefine method to_i'' > > plssssss help > > also can ny1 tell me any other alternative to the abov methode to add > all the elements of the arrayThe elements are actually arrays, when I attempt to reconstruct this. Try this num = hi.inject(0) { | sum, element| sum + element[0].to_i } or take a look at hi.inspect Stephan -- 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 -~----------~----~----~----~------~----~------~--~---