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

Question

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 (<kbd>Playground</kbd>):

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?

Answer 1

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