hashmake

Description

Make hash-based object initialization easy!

Provides hash_make method that can consider parameter name, type, default value, validation, requiredd/not, and container type (none/array/hash) according to the specification provided. The value is assigned to an instance variable matching the arg key.

There is also a make_hash method to turn an object into a representative Hash object. Any hash-makeable sub-objects can be turned into Hash objects as well.

Features

Examples

require 'hashmake'

class MyClass
  include Hashmake::HashMakeable

  ARG_SPECS = {
    :x => arg_spec(:reqd => true, :type => Float, :validator => ->(a){ a.between?(0.0,1.0) }),
    :y => arg_spec(:reqd => false, :type => Float, :validator => ->(a){ a.between?(0.0,1.0) }, :default => 0.0),
  }

  attr_reader :x, :y

  def initialize hashed_args
    hash_make(ARG_SPECS, hashed_args)
  end
end

a = MyClass.new :x => 0.5 # a.x => 0.5, a.y => 0.0
a = MyClass.new :x => 0.5, :y => 0.2 # a.x => 0.5, a.y => 0.2
a = MyClass.new # raise ArgumentError because :x is reqd and not given
a = MyClass.new :y => 0.5 # raise ArgumentError because :x is reqd and not given

Requirements

Install

$ gem install hashmake

Copyright

See LICENSE.txt for details.