Swift_数组

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//TODO:数组 <Any> 任意类型    func arrayAp(){        var bb = Dictionary<String,Float>()        var a = Array<Int>()                //增        a.append(1)        a.append(2)        //删        a.remove(at: 0)        //改        a[0] = 200        //插入        a.insert(3, at: 0)                let b = a                        var c = Array<Any>()        c.append(bb)                        //遍历数组        for sub in b {            print("sub = \(sub)")        }            }

字符串闭包排序

//sorted 参数必须是字符串        let names = ["Cat", "Apple", "Egg", "Block", "Dog"]        //倒序        var reversedNames = names.sorted(by: { (s1: String, s2: String) -> Bool in            return s1 > s2        })        let reversedNames2 = names.sorted { s1, s2 -> Bool in return s1 > s2}  //简写                        //顺序        var sequenceNames2 = names.sorted(by: { (s1: String, s2: String) -> Bool in            return s1 < s2        })        let a = names.sorted { (s1: String, s2: String) -> Bool in            return s1 < s2        }        let b = names.sorted { s1, s2 -> Bool in return s1 < s2}  //简写                let c = names.sorted()

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