Swift

//: Playground - noun: a place where people can play

import UIKit

var str = "Hello, playground"

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

let arrayCount = array.count
array.isEmpty

array.append("G")
array += ["H"]
array += ["I", "J"]

array.insert("Rinpe", atIndex: 0)
array.insert("Bobo", atIndex: 1)
array.removeAtIndex(0)  // 返回被删除的元素
array.removeLast()
array.removeFirst()
array
array[0] = "AA"
//: 通过区间获取出来的还是一个数组, 所以赋值的时候还是要用数组
array[1...3] = ["BB", "CC", "DD"]
array[4...5] = ["hello"]
array

//: 遍历数组
for index in 0..<array.count {
    print(array[index])
}

for item in array {
    print(item)
}

for (index, item) in array.enumerate() {
    print("index:(index), item:(item)")
}