Module: EventMachine::IteratorWithEnumerable

Included in:
Iterator
Defined in:
lib/em/iterator.rb

Overview

Support for Enumerable in Ruby 1.9+

Instance Method Summary collapse

Instance Method Details

#next? ⇒ Boolean

We can't check just next_item as far as it can return nil in two cases: when our enumerator is stopped and when it stores nil value



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# File 'lib/em/iterator.rb', line 36

def next?
  begin
    @next_item = @list.next
    true
  rescue StopIteration
    false
  rescue => e
    raise e
  end
end

#setup_list(list) ⇒ Object

In case of Enumerable object we can use lazyness of Enumerator

Raises:

  • (ArgumentError) 


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# File 'lib/em/iterator.rb', line 29

def setup_list(list)
  raise ArgumentError, 'argument must be an Enumerable' unless list.respond_to?(:each)
  list.to_enum
end