map [string] [] string和map [string] string有什么区别？

I noticed in the Go docs this definition was included:

type Values map[string][]string

I thought it was a mistake, but then I tried this code and it compiles (Playground):

package main

import "fmt"

func main() {
    type MyType map[string][]string

    foobar := make(MyType)

    fmt.Println(foobar)
}

Is it functionally equivalent to map[string]string, or is there some difference?

They are different. One is a map of strings to a slice of strings, vs a map of strings to a single string

The [] in []string denotes a slice

http://play.golang.org/p/nv7wSWW0F7

One is a map of string slices while the other is a map of strings. One structure has a single dimension, the map[string][]string has two. At every key k you'll have items 0-n in the slice. So access requires another level of direction like fmt.Println(myInts[k][0]) as apposed to fmt.Println(myInts[k]). Put data in it and the difference will be more apparent.