module FakeRedis::GeoCommands

def geohash(key, member)
  members = Array(member)
  raise_argument_error("geohash") if members.empty?
  set = (data[key] || GeoSet.new)
  members.map do |member|
    point = set.get(member)
    point.geohash(REDIS_GEOHASH_SIZE) if point
  end
end