Class: Ludy::Lazy

Inherits:

Object

• Object
• Ludy::Lazy

Defined in:

lib/ludy/lazy.rb

Overview

a lazy object would be evaluated until the time it called, and save the result for futher use.

Instance Method Summary

• #initialize(func = nil, &block) ⇒ Lazy constructor

  supply the evaluation function through first argument or block.

• #method_missing(msg, *arg, &block) ⇒ Object

  :nodoc:.

Constructor Details

#initialize(func = nil, &block) ⇒ Lazy

supply the evaluation function through first argument or block

# File 'lib/ludy/lazy.rb', line 13

def initialize func = nil, &block
  if block_given? then @func = block
  else
    raise TypeError, "#{func} don't respond to :call" unless func.respond_to? :call
    @func = func
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(msg, *arg, &block) ⇒ Object

:nodoc:

# File 'lib/ludy/lazy.rb', line 22

def method_missing msg, *arg, &block
  (@obj ||= @func.call).public_send msg, *arg, &block
end