Method: Redis::Connection::Memory#scan

Defined in:
lib/redis/connection/memory.rb

#scan(start_cursor, *args) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1026

def scan(start_cursor, *args)
  match = "*"
  count = 10

  if idx = args.index("MATCH")
    match = args[idx + 1]
  end

  if idx = args.index("COUNT")
    count = args[idx + 1]
  end

  start_cursor = start_cursor.to_i
  data_type_check(start_cursor, Integer)

  cursor = start_cursor
  returned_keys = []
  final_page = start_cursor + count >= keys(match).length

  if final_page
    previous_keys_been_deleted = (count >= keys(match).length)
    start_index = previous_keys_been_deleted ? 0 : cursor

    returned_keys = keys(match)[start_index..-1]
    cursor = 0
  else
    end_index = start_cursor + (count - 1)
    returned_keys = keys(match)[start_cursor..end_index]
    cursor = start_cursor + count
  end

  return "#{cursor}", returned_keys
end