切片为空和空切片等同

// main project main.go package main

import ( "fmt" )

func mm(str string, Nums ...int) { var a []int //切片为nil fmt.Println(len(a)) fmt.Println(a) if a == nil { fmt.Println("[]int comes in") }

fmt.Println(len(Nums))
fmt.Println(Nums)
if Nums == nil {
    fmt.Println("nil comes in")
}

}

func main() { mm("a") }

测试结果： 0 [] []int comes in 0 [] nil comes in 成功: 进程退出代码 0.