swift5.0 --- 数组

一、数组基本操作:

var array = ["hello","world","swift"]
//追加数据到尾部
array.append("ios")
//插入到指定的位置
array.insert("wf", at: 0)
//包含某个
let tmp = array.contains("wf")
//替换
array.replaceSubrange(0...1, with: ["macos","windows"])
//删除
array.remove(at: 0)

print(array)

二、数组排序

var array = ["A","B","C","D","E","F","G"]

//排序--倒序
array.sort { (s1, s2) -> Bool in
    if s1 > s2 {
        return true
    }else{
        return false
    }
}
//过滤包含"D",返回一个新的数组
var newV = array.filter { (item) -> Bool in
    if item != "D" {
        return true
    }else{
        return false
    }
}

print(newV)

三、数组比较

var arr1 = [1,2,3]
var arr2 = [1,2,3,4]

if arr1 == arr2 {
    print("相等")
}else{
    print("不等")
}

四、数组遍历

var array = ["A","B","C","D","E","F","G"]

for item in array.reversed() {
    print(item)
}

for index in 0..<array.count {
    print(index)
}