Contents

class Module

  # Note: This may be better off as a paramerterized module.
  def key_attributes(*fields)
    code = ""
    code << "def ==(o) " << fields.map {|f| "self.#{f} == o.#{f}" }.join(" && ") << " end\n"
    code << "def eql?(o) " << fields.map {|f| "self.#{f}.eql?(o.#{f})" }.join(" && ") << " end\n"
    code << "def hash() " << fields.map {|f| "self.#{f}.hash" }.join(" ^ ") << " end\n"
    # puts code
    class_eval code
    fields
  end

end 

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
facets-0.7.0	lib/facet/module/key_attributes.rb
facets-0.7.1	lib/facet/module/key_attributes.rb
facets-0.7.2	lib/facet/module/key_attributes.rb