day02-16map_sclie

map和slice组合

元素类型为map的切片

//var s1 = make([]map[int]string,10,10)
var s1 = make([]map[int]string,0,10) //定义并初始化了切片，内部map还没初始化
s1[0] = make(map[int]string,1) // 内部map初始化
s1[0][10] = "沙河" //添加一个键值对
fmtPrintln(s1)

值为切片类型的map

var m1 = make(map[string][]int,10)
m1["沙河"] = []int{10,20,30}
fmt.Println(m1)

写一个程序，统计一下字符串中每个单词出现的次数，比如“how do you do”中 “how=1 d0 =2 you=1”