가입 후 초대 링크를 공유하면 동영상 재생 및 초대 보상을 받을 수 있습니다.

Paul Hudson
@twostraws
Learning and sharing at Hacking with Swift. Creator of Kickstart, Unwrap, Ignite, and two small children.
가입 July 2009
272 팔로잉 중    123.1K 팬
If you only need a count, don't fetch all the objects just to call .count on the result. fetchCount() does the work entirely in the database and is dramatically faster.