diff --git a/.ruby-gemset b/.ruby-gemset index 8a60645..4ef2b38 100644 --- a/.ruby-gemset +++ b/.ruby-gemset @@ -1 +1 @@ -simple_memoizer +pakiderm diff --git a/.travis.yml b/.travis.yml new file mode 100644 index 0000000..a13ad22 --- /dev/null +++ b/.travis.yml @@ -0,0 +1,4 @@ +language: ruby +rvm: + - 2.1.1 + - 2.0.0 diff --git a/.yardoc/checksums b/.yardoc/checksums new file mode 100644 index 0000000..044710b --- /dev/null +++ b/.yardoc/checksums @@ -0,0 +1 @@ +lib/pakiderm.rb f8e7aaa94b40435ec49a949fb942b562378678a1 diff --git a/.yardoc/object_types b/.yardoc/object_types new file mode 100644 index 0000000..7592640 Binary files /dev/null and b/.yardoc/object_types differ diff --git a/.yardoc/objects/root.dat b/.yardoc/objects/root.dat new file mode 100644 index 0000000..143b811 Binary files /dev/null and b/.yardoc/objects/root.dat differ diff --git a/.yardoc/proxy_types b/.yardoc/proxy_types new file mode 100644 index 0000000..beefda1 Binary files /dev/null and b/.yardoc/proxy_types differ diff --git a/Gemfile b/Gemfile index baba17b..f03af71 100644 --- a/Gemfile +++ b/Gemfile @@ -1,4 +1,15 @@ source 'https://rubygems.org' gemspec -gem 'activesupport', '4.0.2' +gem 'coveralls', require: false +gem 'rake' +gem 'bundler' + +group :test do + gem 'rspec-given' +end + +group :doc do + gem 'yard' + gem 'yard-tomdoc' +end diff --git a/Gemfile.lock b/Gemfile.lock new file mode 100644 index 0000000..0bfc6eb --- /dev/null +++ b/Gemfile.lock @@ -0,0 +1,61 @@ +PATH + remote: . + specs: + pakiderm (1.0.0) + +GEM + remote: https://rubygems.org/ + specs: + coveralls (0.7.0) + multi_json (~> 1.3) + rest-client + simplecov (>= 0.7) + term-ansicolor + thor + diff-lcs (1.2.5) + docile (1.1.3) + given_core (3.5.4) + sorcerer (>= 0.3.7) + mime-types (2.2) + multi_json (1.9.2) + rake (10.2.2) + rest-client (1.6.7) + mime-types (>= 1.16) + rspec (2.14.1) + rspec-core (~> 2.14.0) + rspec-expectations (~> 2.14.0) + rspec-mocks (~> 2.14.0) + rspec-core (2.14.8) + rspec-expectations (2.14.5) + diff-lcs (>= 1.1.3, < 2.0) + rspec-given (3.5.4) + given_core (= 3.5.4) + rspec (>= 2.12) + rspec-mocks (2.14.6) + simplecov (0.8.2) + docile (~> 1.1.0) + multi_json + simplecov-html (~> 0.8.0) + simplecov-html (0.8.0) + sorcerer (1.0.2) + term-ansicolor (1.3.0) + tins (~> 1.0) + thor (0.19.1) + tins (1.1.0) + tomparse (0.4.2) + yard (0.8.7.4) + yard-tomdoc (0.7.1) + tomparse (>= 0.4.0) + yard + +PLATFORMS + ruby + +DEPENDENCIES + bundler + coveralls + pakiderm! + rake + rspec-given + yard + yard-tomdoc diff --git a/README.md b/README.md index 49f72f8..51d2838 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,4 @@ -Simple Memoizer +Pakiderm ===================== Allows you to memoize simple methods and works only on ruby 2.0. @@ -6,6 +6,8 @@ Allows you to memoize simple methods and works only on ruby 2.0. ## Usage ```ruby class Counter + extend Pakiderm + def increment @sum = 1 + @sum.to_i end @@ -33,7 +35,7 @@ counter.increment As you can see, it also provides an assignment operator, so you can override the memoized value :smiley:. ## Background -SimpleMemoizer uses Module#prepend to add the memoized method before yours in the method lookup path of your class. Your method is called by using 'super', because the class is an ancestor to the prepended module. +Pakiderm uses Module#prepend to add the memoized method before yours in the method lookup path of your class. Your method is called by using 'super', because the class is an ancestor to the prepended module. ### Corolary If you override a memoized method in a derived class, you alter the method chain, so the derived method won't be memoized unless you invoke memoize in the derived class as well. diff --git a/doc/Pakiderm.html b/doc/Pakiderm.html new file mode 100644 index 0000000..c0484d1 --- /dev/null +++ b/doc/Pakiderm.html @@ -0,0 +1,662 @@ + + + + + + Module: Pakiderm + + — Documentation by YARD 0.8.7.4 + + + + + + + + + + + + + + + + + + + + + +

Module: Pakiderm + + + +

+ +
+ + + + + + + + +
Defined in:
+
lib/pakiderm.rb
+ +
+
+ +

Overview

+
+ +

Mixin that adds memoization functionality to a plain ruby object. +Memoization is selectively applied to methods by using the `memoize` +method.

+ + +
+
+
+ +
+

Examples:

+ + + 
class PersonQuery
+  extend Pakiderm
+  def recent_activity
+    NSA.get("/api/#{person.id}")
+  end
+  memoize :recent_activity
+end
+ +
+ + +
+ + + + + + + +

+ Class Method Summary + (collapse) +

+ + + +

+ Instance Method Summary + (collapse) +

+ + + + + + +
+

Class Method Details

+ + +
+

+ + + (Object) assignment_method(name, ivar) + + + + + +

+
+

+ This method is part of a private API. + You should avoid using this method if possible, as it may be removed or be changed in the future. +

+ +

Generates an assignment method for the memoized value.

+ + +
+
+
+

Parameters:

+
    + +
  • + + name + + + + + + + — +
    +

    Name of the memoized method.

    +
    + +
    • + +
  • + + ivar + + + + + + + — +
    +

    Name of the instance variable used to store the memoized result.

    +
    + +
    • + +
+ +

Returns:

+
    + +
  • + + + + + + + +
    +

    a String with the code of the assignment method.

    +
    + +
    • + +
+ +
+ + + + +
+ 
+
+
+67
+68
+69
+70
+71
+72
+73
+ 		+ 
# File 'lib/pakiderm.rb', line 67
+
+def self.assignment_method(name, ivar)
+  <<-ASSIGNMENT
+    def #{name}=(value)
+      #{ivar} = [value]
+    end
+  ASSIGNMENT
+end
+
+
+ +
+

+ + + (Object) memoized_ivar_for(name) + + + + + +

+
+

+ This method is part of a private API. + You should avoid using this method if possible, as it may be removed or be changed in the future. +

+ +

Creates a valid instance variable name from a method name

+ + +
+
+
+ +
+

Examples:

+ + + 
Pakiderm.memoized_ivar_for(:empty?)
+# => '@_memoized_empty_query'
+ +
+

Parameters:

+
    + +
  • + + name + + + + + + + — +
    +

    Name of the memoized method.

    +
    + +
    • + +
+ +

Returns:

+
    + +
  • + + + + + + + +
    +

    a String with the code of the assignment method.

    +
    + +
    • + +
+ +
+ + + + +
+ 
+
+
+85
+86
+87
+ 		+ 
# File 'lib/pakiderm.rb', line 85
+
+def self.memoized_ivar_for(name)
+  "@_memoized_#{name.to_s.sub(/\?$/, '_query').sub(/!$/, '_bang')}"
+end
+
+
+ +
+

+ + + (Object) memoized_method(name, ivar) + + + + + +

+
+

+ This method is part of a private API. + You should avoid using this method if possible, as it may be removed or be changed in the future. +

+ +

Generates a memoized method string.

+ + +
+
+
+

Parameters:

+
    + +
  • + + name + + + + + + + — +
    +

    Name of the method to memoize.

    +
    + +
    • + +
  • + + ivar + + + + + + + — +
    +

    Name of the instance variable used to store the memoized result.

    +
    + +
    • + +
+ +

Returns:

+
    + +
  • + + + + + + + +
    +

    a String with the code of the memoized method.

    +
    + +
    • + +
+ +
+ + + + +
+ 
+
+
+49
+50
+51
+52
+53
+54
+55
+56
+57
+58
+ 		+ 
# File 'lib/pakiderm.rb', line 49
+
+def self.memoized_method(name, ivar)
+  <<-MEMOIZATION
+    def #{name}
+      unless #{ivar}
+        #{ivar} = [super]
+      end
+      #{ivar}[0]
+    end
+  MEMOIZATION
+end
+
+
+ +
+ +
+

Instance Method Details

+ + +
+

+ + - (void) memoize(*names) + + + + + +

+
+

This method returns an undefined value.

+

Adds memoization to methods without parameters. Can receive a single method +name, or a list of methods, and an :assignable option that when true will +create an assignment method to modify the memoized value.

+ + +
+
+
+ +
+

Examples:

+ + + 
memoize :tired?, :complex_formula, :long_running_method!
+ + + 
memoize :meaning_of_life, assignable: true
+# self.meaning_of_life = 42
+ +
+

Parameters:

+
    + +
  • + + names + + + + + + + — +
    +

    Names of the methods to be memoized. Can take a hash of options as the last +parameter. Only valid option is :assignable.

    +
    + +
    • + +
+ + +
+ + + + +
+ 
+
+
+31
+32
+33
+34
+35
+36
+37
+38
+39
+40
+ 		+ 
# File 'lib/pakiderm.rb', line 31
+
+def memoize(*names)
+  assignable = names.last.is_a?(Hash) ? names.pop[:assignable] : false
+  memoized = Module.new
+  names.each do |name|
+    ivar = Pakiderm.memoized_ivar_for(name)
+    memoized.module_eval Pakiderm.memoized_method(name, ivar)
+    memoized.module_eval Pakiderm.assignment_method(name, ivar) if assignable
+  end
+  prepend memoized
+end
+
+
+ +
+ +
+ + + + + \ No newline at end of file diff --git a/doc/_index.html b/doc/_index.html new file mode 100644 index 0000000..83795d6 --- /dev/null +++ b/doc/_index.html @@ -0,0 +1,110 @@ + + + + + + Documentation by YARD 0.8.7.4 + + + + + + + + + + + + + + + + + + + + + +

Documentation by YARD 0.8.7.4

+
+

Alphabetic Index

+ +

File Listing

+ + +
+

Namespace Listing A-Z

+ + + + + + + + +
+ + + + +
+ +
+ +
+ + + + + \ No newline at end of file diff --git a/doc/class_list.html b/doc/class_list.html new file mode 100644 index 0000000..f41e61b --- /dev/null +++ b/doc/class_list.html @@ -0,0 +1,54 @@ + + + + + + + + + + + + + + + + + Class List + + + + +
+

Class List

+ + + + +
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} +.frames #nav span:last-child:after { content: ''; } + +.frames #content h1 { margin-top: 0; } +.frames li { white-space: nowrap; cursor: normal; } +.frames li small { display: block; font-size: 0.8em; } +.frames li small:before { content: ""; } +.frames li small:after { content: ""; } +.frames li small.search_info { display: none; } +.frames #search { width: 170px; position: static; margin: 3px; margin-left: 10px; font-size: 0.9em; color: #888; padding-left: 0; padding-right: 24px; } +.frames #content.insearch #search { background-position: center right; } +.frames #search input { width: 110px; } +.frames #nav { display: block; } + +#full_list.insearch li { display: none; } +#full_list.insearch li.found { display: list-item; padding-left: 10px; } +#full_list.insearch li a.toggle { display: none; } +#full_list.insearch li small.search_info { display: block; } diff --git a/doc/css/style.css b/doc/css/style.css new file mode 100644 index 0000000..96307c5 --- /dev/null +++ b/doc/css/style.css @@ -0,0 +1,339 @@ +body { + padding: 0 20px; 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index 0000000..a266d28 --- /dev/null +++ b/doc/method_list.html @@ -0,0 +1,77 @@ + + + + + + + + + + + + + + + + + Method List + + + + +
+

Method List

+ + + + +
+ + diff --git a/doc/top-level-namespace.html b/doc/top-level-namespace.html new file mode 100644 index 0000000..b9bf591 --- /dev/null +++ b/doc/top-level-namespace.html @@ -0,0 +1,112 @@ + + + + + + Top Level Namespace + + — Documentation by YARD 0.8.7.4 + + + + + + + + + + + + + + + + + + + + + +

Top Level Namespace + + + +

+ +
+ + + + + + + + +
+
+ +

Defined Under Namespace

+

+ + + Modules: Pakiderm + + + + +

+ + + + + + + + + +
+ + + + + \ No newline at end of file diff --git a/lib/pakiderm.rb b/lib/pakiderm.rb new file mode 100644 index 0000000..9ad7161 --- /dev/null +++ b/lib/pakiderm.rb @@ -0,0 +1,88 @@ +# Public: Mixin that adds memoization functionality to a plain ruby object. +# Memoization is selectively applied to methods by using the `memoize` method. +# +# Examples +# +# class PersonQuery +# extend Pakiderm +# def recent_activity +# NSA.get("/api/#{person.id}") +# end +# memoize :recent_activity +# end +# +module Pakiderm + + # Public: Adds memoization to methods without parameters. Can receive a + # single method name, or a list of methods, and an :assignable option that + # when true will create an assignment method to modify the memoized value. + # + # names - Names of the methods to be memoized. Can take a hash of options as + # the last parameter. Only valid option is :assignable. + # + # Examples + # + # memoize :tired?, :complex_formula, :long_running_method! + # + # memoize :meaning_of_life, assignable: true + # # self.meaning_of_life = 42 + # + # Returns nothing. + def memoize(*names) + assignable = names.last.is_a?(Hash) ? names.pop[:assignable] : false + memoized = Module.new + names.each do |name| + ivar = Pakiderm.memoized_ivar_for(name) + memoized.module_eval Pakiderm.memoized_method(name, ivar) + memoized.module_eval Pakiderm.assignment_method(name, ivar) if assignable + end + prepend memoized + end + + # Internal: Generates a memoized method string. + # + # name - Name of the method to memoize. + # + # ivar - Name of the instance variable used to store the memoized result. + # + # Returns a String with the code of the memoized method. + def self.memoized_method(name, ivar) + <<-MEMOIZATION + def #{name} + unless #{ivar} + #{ivar} = [super] + end + #{ivar}[0] + end + MEMOIZATION + end + + # Internal: Generates an assignment method for the memoized value. + # + # name - Name of the memoized method. + # + # ivar - Name of the instance variable used to store the memoized result. + # + # Returns a String with the code of the assignment method. + def self.assignment_method(name, ivar) + <<-ASSIGNMENT + def #{name}=(value) + #{ivar} = [value] + end + ASSIGNMENT + end + + # Internal: Creates a valid instance variable name from a method name + # + # name - Name of the memoized method. + # + # Examples + # + # Pakiderm.memoized_ivar_for(:empty?) + # # => '@_memoized_empty_query' + # + # Returns a String with the code of the assignment method. + def self.memoized_ivar_for(name) + "@_memoized_#{name.to_s.sub(/\?$/, '_query').sub(/!$/, '_bang')}" + end +end diff --git a/lib/simple_memoizer.rb b/lib/simple_memoizer.rb deleted file mode 100644 index 3724880..0000000 --- a/lib/simple_memoizer.rb +++ /dev/null @@ -1,31 +0,0 @@ -module SimpleMemoizer - extend ActiveSupport::Concern - - module ClassMethods - def memoize(*method_names) - method_names.flatten! - memoized_module = Module.new do - method_names.each do |name| - memoized_ivar = SimpleMemoizer.memoized_ivar_for(name) - module_eval <<-EVAL - def #{name} - unless #{memoized_ivar} - #{memoized_ivar} = [super] - end - #{memoized_ivar}[0] - end - - def #{name}=(value) - #{memoized_ivar} = [value] - end - EVAL - end - end - prepend memoized_module - end - end - - def self.memoized_ivar_for(symbol) - "@_memoized_#{symbol.to_s.sub(/\?\Z/, '_query').sub(/!\Z/, '_bang')}".to_sym - end -end diff --git a/simple_memoizer.gemspec b/pakiderm.gemspec similarity index 53% rename from simple_memoizer.gemspec rename to pakiderm.gemspec index c908bee..67f3e03 100644 --- a/simple_memoizer.gemspec +++ b/pakiderm.gemspec @@ -1,20 +1,18 @@ Gem::Specification.new do |s| - s.name = "simple_memoizer" - s.version = '0.1.0' + s.name = "pakiderm" + s.version = '1.0.0' s.licenses = ['MIT'] - s.summary = "Simple memoization for simple methods" - s.description = "Simple Memoizer is a helper module that encapsulates a modern memoization technique." + s.summary = "Pakiderm will never forget the return value." + s.description = "Pakiderm is a simple module that encapsulates a modern memoization technique." s.authors = ["Máximo Mussini"] s.email = ["maximomussini@gmail.com"] s.extra_rdoc_files = ["README.md"] s.files = Dir.glob("{lib}/**/*.rb") + %w(README.md) - s.homepage = %q{https://github.com/ElMassimo/simple_memoizer} + s.homepage = %q{https://github.com/ElMassimo/pakiderm} s.platform = Gem::Platform::RUBY s.required_ruby_version = '>=2.0' s.rdoc_options = ["--charset=UTF-8"] s.require_paths = ["lib"] - - s.add_runtime_dependency 'activesupport' end diff --git a/spec/pakiderm/pakiderm_spec.rb b/spec/pakiderm/pakiderm_spec.rb new file mode 100644 index 0000000..7f2b81f --- /dev/null +++ b/spec/pakiderm/pakiderm_spec.rb @@ -0,0 +1,32 @@ +require 'spec_helper' +require './lib/pakiderm' +require 'support/counter' + +describe Pakiderm do + Given(:counter) { Counter.new } + + context 'when calling a method without parameters' do + When (:result) { counter.increment } + Then { result == 1 } + And { counter.increment == result } + And { counter.increment == result } + end + + context 'when stepping over the memoized value' do + When (:result) { counter.increment = 10} + Then { result == 10 } + And { counter.increment == 10 } + end + + context 'when method ends with a ? or a !' do + When { counter.empty? && counter.empty! && counter.increment } + Then { counter.empty? } + And { counter.empty! == 0 } + And { counter.sum == 1 } + end + + context 'when not passing :assignable as true' do + When(:result) { counter.decrement = 5 } + Then { expect(result).to have_failed(NoMethodError) } + end +end diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb new file mode 100644 index 0000000..6fd6d8c --- /dev/null +++ b/spec/spec_helper.rb @@ -0,0 +1,37 @@ +require 'rspec/given' + +def stub_module(full_name, &block) + stub_class_or_module(full_name, Module) +end +def stub_class(full_name, &block) + stub_class_or_module(full_name, Class) +end +def stub_class_or_module(full_name, kind, &block) + full_name.to_s.split(/::/).inject(Object) do |context, name| + begin + # Give autoloading an opportunity to work + context.const_get(name) + rescue NameError + # Defer substitution of a stub module/class to the last possible + # moment by overloading const_missing. We use a module here so + # we can "stack" const_missing definitions for various + # constants. + mod = Module.new do + define_method(:const_missing) do |missing_const_name| + if missing_const_name.to_s == name.to_s + value = kind.new + const_set(name, value) + value + else + super(missing_const_name) + end + end + end + context.extend(mod) + end + end +end + +RSpec.configure do |config| + config.color_enabled = true +end diff --git a/spec/support/counter.rb b/spec/support/counter.rb new file mode 100644 index 0000000..fed51ae --- /dev/null +++ b/spec/support/counter.rb @@ -0,0 +1,28 @@ +class Counter + extend Pakiderm + + attr_reader :sum + + def initialize + @sum = 0 + end + + def increment + @sum = @sum.to_i + 1 + end + + def decrement + @sum = @sum.to_i - 1 + end + + def empty? + @sum == 0 + end + + def empty! + @sum = 0 + end + + memoize :increment, assignable: true + memoize :empty?, :empty!, :decrement +end