Class: FactoryBotCaching::ImmutableIterator

Inherits:
Object
  • Object
show all
Defined in:
lib/factory_bot_caching/immutable_iterator.rb

Instance Method Summary collapse

Constructor Details

#initialize(enumerable) ⇒ ImmutableIterator

Returns a new instance of ImmutableIterator.



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# File 'lib/factory_bot_caching/immutable_iterator.rb', line 27

def initialize(enumerable)
  # Make a shallow copy of the collection to ensure mutations to the original array do not affect our iterator:
  @enumerator = enumerable.is_a?(Enumerator) ? enumerable.to_a : enumerable.dup
  @position   = 0
end

Instance Method Details

#fast_forward(&comparison) ⇒ Object 



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# File 'lib/factory_bot_caching/immutable_iterator.rb', line 47

def fast_forward(&comparison)
  while(next?)
    return if comparison.call(peek)
    advance_position
  end
end

#next(&comparison) ⇒ Object

Advances the position of the iterator to the next value. If a block is given, advances to the next value where the block returns true, or the end of the collection if none match.



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# File 'lib/factory_bot_caching/immutable_iterator.rb', line 42

def next(&comparison)
  fast_forward(&comparison) if block_given?
  return next? ? next_value : nil
end

#peek ⇒ Object 



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# File 'lib/factory_bot_caching/immutable_iterator.rb', line 54

def peek
  enumerator[@position]
end

#until_end ⇒ Object 



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# File 'lib/factory_bot_caching/immutable_iterator.rb', line 33

def until_end
  while(next?)
    yield next_value
  end
end