Added each_key and each_value.

.rubocop.yml

@@ -1,5 +1,15 @@
 AllCops:
+  TargetRubyVersion: 2.3
   Exclude:
     - vendor/**/*
 
+Style/HashEachMethods:
+  Enabled: true
+
+Style/HashTransformKeys:
+  Enabled: true
+
+Style/HashTransformValues:
+  Enabled: true
+
 inherit_from: .rubocop_todo.yml

.rubocop_todo.yml

@@ -1,15 +1,16 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2018-02-15 19:02:43 -0500 using RuboCop version 0.52.1.
+# on 2020-03-27 09:23:34 -0400 using RuboCop version 0.80.1.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
 # Offense count: 1
 # Configuration parameters: CountComments, ExcludedMethods.
+# ExcludedMethods: refine
 Metrics/BlockLength:
-  Max: 170
+  Max: 180
 
 # Offense count: 1
 # Configuration parameters: ExpectMatchingDefinition, Regex, IgnoreExecutableScripts, AllowedAcronyms.
@@ -18,12 +19,12 @@ Naming/FileName:
   Exclude:
     - 'lib/ruby-enum.rb'
 
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: AutoCorrect.
-Performance/HashEachMethods:
+# Offense count: 6
+# Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
+# AllowedNames: io, id, to, by, on, in, at, ip, db, os, pp
+Naming/MethodParameterName:
   Exclude:
-    - 'spec/ruby-enum/enum_spec.rb'
+    - 'lib/ruby-enum/enum.rb'
 
 # Offense count: 4
 Style/Documentation:
@@ -35,7 +36,8 @@ Style/Documentation:
     - 'lib/ruby-enum/errors/uninitialized_constant_error.rb'
 
 # Offense count: 10
-# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect, AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
 # URISchemes: http, https
-Metrics/LineLength:
+Layout/LineLength:
   Max: 148

.travis.yml

@@ -9,8 +9,6 @@ rvm:
   - 2.6.5
   - 2.4.0
   - 2.3.1
-  - 2.2
-  - 2.1.1
   - ruby-head
   - jruby-head
 

CHANGELOG.md

@@ -1,18 +1,21 @@
-### 0.7.3 (Next)
+### 0.8.0 (Next)
 
+* [#22](https://github.com/dblock/ruby-enum/pull/22): Added `Ruby::Enum#each_key` and `Ruby::Enum#each_value` - [@dblock](https://github.com/dblock).
+* [#22](https://github.com/dblock/ruby-enum/pull/22): Dropped support for Ruby 2.2 - [@dblock](https://github.com/dblock).
+* [#22](https://github.com/dblock/ruby-enum/pull/22): Upgraded RuboCop to 0.80.1 - [@dblock](https://github.com/dblock).
 * Your contribution here.
 
 ### 0.7.2 (15/3/2017)
 
-* [#18](https://github.com/dblock/ruby-enum/pull/18): Adds support for non constant definition - [@laertispappas](https://github.com/laertispappas).
+* [#18](https://github.com/dblock/ruby-enum/pull/18): Added support for non constant definition - [@laertispappas](https://github.com/laertispappas).
 
 ### 0.7.1 (23/2/2017)
 
-* [#16](https://github.com/dblock/ruby-enum/pull/16): Replaces const_missing method in favor of const_set - [@laertispappas](https://github.com/laertispappas).
+* [#16](https://github.com/dblock/ruby-enum/pull/16): Replaced `const_missing` with `const_set` - [@laertispappas](https://github.com/laertispappas).
 
 ### 0.7.0 (21/2/2017)
 
-* [#3](https://github.com/dblock/ruby-enum/pull/13): Adds support for sub classing an Enum - [@laertispappas](https://github.com/laertispappas).
+* [#3](https://github.com/dblock/ruby-enum/pull/13): Added support for subclassing an Enum - [@laertispappas](https://github.com/laertispappas).
 
 ### 0.6.0 (12/5/2016)
 

Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'http://rubygems.org'
 
 gemspec
@@ -6,5 +8,5 @@ gem 'rake'
 
 group :development, :test do
   gem 'rspec', '~> 3.0'
-  gem 'rubocop', '0.52.1'
+  gem 'rubocop', '0.80.1'
 end

README.md

@@ -68,6 +68,18 @@ Colors.each do |key, enum|
 end
 ```
 
+``` ruby
+Colors.each_key do |key|
+  # :RED, :GREEN
+end
+```
+
+``` ruby
+Colors.each_value do |value|
+  # "red", "green"
+end
+```
+
 #### Mapping
 
 ``` ruby

Rakefile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rubygems'
 require 'bundler/gem_tasks'
 

lib/ruby-enum.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'i18n'
 
 require 'ruby-enum/version'

lib/ruby-enum/enum.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Ruby
   module Enum
     attr_reader :key, :value
@@ -85,7 +87,7 @@ def key?(k)
       # Returns the corresponding enum instance or nil.
       def value(k)
         enum = @_enum_hash[k]
-        enum.value if enum
+        enum&.value
       end
 
       # Whether the specified value exists in this enum.
@@ -106,7 +108,7 @@ def value?(v)
       # Returns the corresponding key symbol or nil.
       def key(v)
         enum = @_enums_by_value[v]
-        enum.key if enum
+        enum&.key
       end
 
       # Returns all enum keys.
@@ -119,6 +121,22 @@ def values
         @_enum_hash.values.map(&:value)
       end
 
+      # Iterate over all enumerated values.
+      # Required for Enumerable mixin
+      def each_value(&_block)
+        @_enum_hash.each_value do |v|
+          yield v.value
+        end
+      end
+
+      # Iterate over all enumerated keys.
+      # Required for Enumerable mixin
+      def each_key(&_block)
+        @_enum_hash.each_value do |v|
+          yield v.key
+        end
+      end
+
       def to_h
         Hash[@_enum_hash.map do |key, enum|
           [key, enum.value]

lib/ruby-enum/errors/base.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Ruby
   module Enum
     module Errors
@@ -26,7 +28,7 @@ def compose_message(key, attributes = {})
 
         private
 
-        BASE_KEY = 'ruby.enum.errors.messages'.freeze #:nodoc:
+        BASE_KEY = 'ruby.enum.errors.messages' #:nodoc:
 
         # Given the key of the specific error and the options hash, translate the
         # message.

lib/ruby-enum/errors/duplicate_key_error.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Ruby
   module Enum
     module Errors

lib/ruby-enum/errors/duplicate_value_error.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Ruby
   module Enum
     module Errors

lib/ruby-enum/errors/uninitialized_constant_error.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Ruby
   module Enum
     module Errors

lib/ruby-enum/version.rb

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 module Ruby
   module Enum
-    VERSION = '0.7.2'.freeze
+    VERSION = '0.8.0'
   end
 end

lib/ruby_enum.rb

@@ -1 +1,3 @@
+# frozen_string_literal: true
+
 require 'ruby-enum'

ruby-enum.gemspec

@@ -1,4 +1,6 @@
-$LOAD_PATH.push File.expand_path('../lib', __FILE__)
+# frozen_string_literal: true
+
+$LOAD_PATH.push File.expand_path('lib', __dir__)
 require 'ruby-enum/version'
 
 Gem::Specification.new do |s|

spec/ruby-enum/enum_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 class Colors
@@ -63,8 +65,13 @@ class SecondSubclass < FirstSubclass
     end
   end
   context '#key?' do
-    it 'returns true for valid keys' do
-      Colors.keys.each do |key|
+    it 'returns true for valid keys accessed directly' do
+      Colors.keys.each do |key| # rubocop:disable Style/HashEachMethods
+        expect(Colors.key?(key)).to eq(true)
+      end
+    end
+    it 'returns true for valid keys accessed via each_keys' do
+      Colors.each_key do |key|
         expect(Colors.key?(key)).to eq(true)
       end
     end
@@ -83,8 +90,13 @@ class SecondSubclass < FirstSubclass
     end
   end
   context '#value?' do
-    it 'returns true for valid values' do
-      Colors.values.each do |value|
+    it 'returns true for valid values accessed directly' do
+      Colors.values.each do |value| # rubocop:disable Style/HashEachMethods
+        expect(Colors.value?(value)).to eq(true)
+      end
+    end
+    it 'returns true for valid values accessed via each_value' do
+      Colors.each_value do |value|
         expect(Colors.value?(value)).to eq(true)
       end
     end
@@ -149,7 +161,7 @@ class EmptyEnums
 
   context 'when a constant is redefined in a global namespace' do
     before do
-      RED = 'black'.freeze
+      RED = 'black'
     end
 
     it { expect(Colors::RED).to eq 'red' }

spec/ruby-enum/version_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Ruby::Enum do

spec/spec_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 $LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
 
 require 'rubygems'