Sha256: 888e1d5c0d19e032e6a01449480a6904f953e6bb3dc0300997b1cdea3bd2c30c
Contents?: true
Size: 1.23 KB
Versions: 15
Compression:
Stored size: 1.23 KB
Contents
module Ardm
module Equalizer
def equalize(*methods)
define_eql_method(methods)
define_equivalent_method(methods)
define_hash_method(methods)
end
private
def define_eql_method(methods)
class_eval <<-RUBY, __FILE__, __LINE__ + 1
def eql?(other)
return true if equal?(other)
instance_of?(other.class) &&
#{methods.map { |method| "#{method}.eql?(other.#{method})" }.join(' && ')}
end
RUBY
end
def define_equivalent_method(methods)
respond_to = []
equivalent = []
methods.each do |method|
respond_to << "other.respond_to?(#{method.inspect})"
equivalent << "#{method} == other.#{method}"
end
class_eval <<-RUBY, __FILE__, __LINE__ + 1
def ==(other)
return true if equal?(other)
return false unless kind_of?(other.class) || other.kind_of?(self.class)
#{respond_to.join(' && ')} &&
#{equivalent.join(' && ')}
end
RUBY
end
def define_hash_method(methods)
class_eval <<-RUBY, __FILE__, __LINE__ + 1
def hash
self.class.hash ^ #{methods.map { |method| "#{method}.hash" }.join(' ^ ')}
end
RUBY
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems