Swift 数组

• 申明一个空数组要指定数组类型

var emptyArray = [String]()

• 合并数组

var list = ["one","two","three"]
var listTemp = ["zero"]
var resultArray = list + listTemp
print(resultArray) // ["one", "two", "three", "zero"]

• 添加元素

var list = ["one","two","three"]
list.append("four")
print(list) // ["one", "two", "three", "four"]

• 数组置空

list = []

• 插入元素

var list = ["one","two","three"]
list.insert("zero", at: 0)
print(list) // ["zero", "one", "two", "three"]