From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2009-01-21T01:34:43+09:00
Subject: Re: issue using method 'odd?'

On Tue, Jan 20, 2009 at 5:26 PM, Mmcolli00 Mom <mmc_collins@yahoo.com> wrote:
> I keep getting a no method error when trying to find out if a count is
> an odd number. I had tested the code with actual numbers and it works
> fine. It seems like it is not liking how I am trying to use the method
> 'odd?' The count's class is of FixNum. I have tried converting to
> interger but got same result. Here is the code that I am using. Do you
> know if I need a gem or what I have not done here? Thanks. MC
>
> searchText.rb:38: undefined method `odd?' for 8:Fixnum (NoMethodError)
>  from searchText.rb:30:in `each'
>  from searchText.rb:30
> *****************************************
> count1 = Hash.new(0)
>
> File.open("NTemp.txt") do |src|
>  src.each_line do |line|
>    word1 = line.chomp.split(",")
>    count1[word1] += 1
>    #~ count2[word2] += 1
>  end
> end
>
> words = (count1.keys).uniq
> words.each do |word|
>
>   #~ if count[word] == 1
>   #~ if count[word] == 2
>
>  if count[word].odd? == true
>    puts "Value does not contain a match: #{word}"
>  end
> end
> --
> Posted via http://www.ruby-forum.com/.
>
>



Ruby 1.8 doesn't have an odd? method per se. Rail's ActiveSupport adds
one to Integer. The code is quite simple, so I wouldn't require active
support only for this:

      module EvenOdd
        def multiple_of?(number)
          self % number == 0
        end

        def even?
          multiple_of? 2
        end if RUBY_VERSION < '1.9'

        def odd?
          !even?
        end if RUBY_VERSION < '1.9'
      end

Ruby 1.9 has Fixnum#odd? though.

Jesus.