iOS -- 代码优化

1. filter 优化

原代码

 if var vcs = vcs {for vc in vcs {if vc is XXLoginViewController {if let index = vcs.firstIndex(of: vc) {vcs.remove(at: index)}}
}

修改后

vcs = vcs?.filter { !($0 is XXLoginViewController) }

或者

vcs?.removeAll(where: { $0 is XXLoginViewController })

filter, map, reduce的用法详见
https://juejin.cn/post/6844903574506307592
https://www.jianshu.com/p/74854e641d87

2. return 优化

案例1

func checkExpire(time: TimeInterval) -> Bool {if Date()<