instancevalue

• This repository is archived
• No longer maintained
• All versions have been yanked from https://rubygems.org for releasing valuable namespace for others

I still want these feature in Ruby...

Description

Constant values for each instance.

Features

instance_variable like API

• .value_reader
• #instance_value_defined?
• #instance_value_get
• #instance_value_set
• #instance_values
• #remove_instance_value

Aliased shortname

• #val

Usage

require 'instancevalue'

class Person

  include InstanceValue

  value_reader :birthday

  def initialize(birthday)
    val :birthday, birthday
  end

  def age
    (Time.now - birthday) / (60 * 60 * 24 * 365)
  end

end

person = Person.new Time.at YOUR_BIRTHDAY
person.birthday                                 #=> YOUR_BIRTHDAY
person.age                                      #=> age at runtime
person.instance_eval{val :birthday, Time.now}   #=> Exception

Requirements

• Require Ruby 2.3.3 or later

License

The MIT X11 License Copyright (c) 2012 Kenichi Kamiya See MIT-LICENSE for further details.