Class: APNS::InfiniteArray

Inherits:
Object
  • Object
show all
Defined in:
lib/apns/infinite_array.rb

Instance Method Summary collapse

Constructor Details

#initialize(buffer_size:) ⇒ InfiniteArray

Returns a new instance of InfiniteArray.



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# File 'lib/apns/infinite_array.rb', line 13

def initialize(buffer_size:)
  @buffer_size = buffer_size
  @buf = []
end

Instance Method Details

#buffer_index_from(index:) ⇒ Object 



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# File 'lib/apns/infinite_array.rb', line 55

def buffer_index_from(index:)
  return if index > @buf.last.index
  buf_index = index - @buf[0].index
  return if buf_index < 0
  buf_index
end

#clear ⇒ Object 



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# File 'lib/apns/infinite_array.rb', line 50

def clear
  @buf = []
  @hash = {}
end

#delete_where_index_less_than(index) ⇒ Object 



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# File 'lib/apns/infinite_array.rb', line 44

def delete_where_index_less_than index
  while @buf[0].index < index
    pop_front
  end
end

#item_at(index) ⇒ Object 



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# File 'lib/apns/infinite_array.rb', line 28

def item_at index
  buf_index = buffer_index_from(index: index)
  return unless buf_index
  @buf[buf_index].item
end

#items_from(index) ⇒ Object 



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# File 'lib/apns/infinite_array.rb', line 34

def items_from index
  buf_index = buffer_index_from(index: index)
  return [] unless buf_index
  @buf[buf_index..-1].map(&:item)
end

#pop_front ⇒ Object 



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# File 'lib/apns/infinite_array.rb', line 40

def pop_front
  @buf = @buf[1..-1]
end

#push(item) ⇒ Object 



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# File 'lib/apns/infinite_array.rb', line 18

def push item
  @buf << Element.new(index: size, item: item)
  pop_front if @buf.size > @buffer_size
end

#size ⇒ Object 



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# File 'lib/apns/infinite_array.rb', line 23

def size
  return 0 if @buf[0].nil?
  @buf.last.index + 1
end