Module: ModalSupport::BracketConstructor

Defined in:
lib/modalsupport/mixins/bracket_constructor.rb

Overview

Mixin that adds a [] operator constructor to a class, which is a not-so-ugly alternative to the new method.

class A
  include BracketConstructor
  def initialize(a)
    puts "A.new(#{a.inspect})"
  end 
end

A[100] # => A.new(100)

In Rails, this kind of constructor has an advantage over a function such as:

def A(*args)
  A.new(*args)
end

With the A[] notation we’ve referenced the class name via the constant A, which in Rails brings in the declaration for A automatically, whereas the method A() won’t be found unless the file which declares it is explicitely required.

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/modalsupport/mixins/bracket_constructor.rb', line 26

def self.included(base)
  base.extend ClassMethods
end