什么是array

package main

import (
    "fmt"
    "reflect"
)

func main() {
    a := [...]string{"Felix", "Anatole", "Juice"}
    fmt.Println(len(a))            //3
    fmt.Println(reflect.TypeOf(a)) //[3]string

    b := [...]string{"Felix", "Anatole", "Juice", "Bin"}
    fmt.Println(len(b))             //4
    fmt.Println(reflect.TypeOf(b))  //[4]string
    fmt.Println(reflect.TypeOf(&b)) //*[4]string
    Change(&b)
    fmt.Println(b[0]) //Felix2
    //Change(&a)// compile error 参数个数异常

    s := b[:]
    Change2(s)
    fmt.Println(b[0])              //Felix Change2,也会更改原数组的值
    fmt.Println(reflect.TypeOf(s)) //[]string

    Change2(a[:])
    fmt.Println(a[0], a[1]) //Felix Change2, Anatole

}

//传指针
func Change(arr *[4]string) {
    arr[0] = "Felix2"
}

func Change2(s []string) {
    s[0] = "Felix Change2"
}