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Revision: 16338
at July 31, 2009 11:49 by bananastalktome
Initial Code 
class Version
  include Comparable

  attr_reader :major, :feature_group, :feature, :bugfix

  def initialize(version="")
    v = version.split(".")
    @major = v[0].to_i
    @feature_group = v[1].to_i
    @feature = v[2].to_i
    @bugfix = v[3].to_i
  end
  
  def <=>(other)
    return @major <=> other.major if ((@major <=> other.major) != 0)
    return @feature_group <=> other.feature_group if ((@feature_group <=> other.feature_group) != 0)
    return @feature <=> other.feature if ((@feature <=> other.feature) != 0)
    return @bugfix <=> other.bugfix
  end

  def self.sort
    self.sort!{|a,b| a <=> b}
  end

  def to_s
    @major.to_s + "." + @feature_group.to_s + "." + @feature.to_s + "." + @bugfix.to_s
  end
end

## Example Usage:
##  list = []
##  ["1.2.2.10","1.2.2.1","2.1.10.2","2.3.4.1"].each {|v| list.push(Version.new(v)) }
##  list.sort.each{|v| pp v.to_s }
##
###"1.2.2.1"
###"1.2.2.10"
###"2.1.10.2"
###"2.3.4.1"
Initial URL 

                                

                                                            

                                    

                                        

                                        Initial Description
                                        

                                    

                                    
Probably not the most elegant solution, but it works. Needed this for a capistrano deploy task which shows the most recent tagged releases in my repository. Very bare bones, and needs tweaking if your versions are not in X.X.X.X format.

                                

                                                            

                                    

                                        

                                        Initial Title
                                        

                                    

                                    
Ruby class for easy version number natural order sorting

                                

                                                            

                                    

                                        

                                        Initial Tags
                                        

                                    

                                    
sort, number, ruby, order

                                

                                                            

                                    

                                        

                                        Initial Language
                                        

                                    

                                    
Ruby