我對 Go 中的按值傳遞感到困惑。我正在這樣做；package mainimport ( "fmt")type point struct { x int list []int}func main() { p := point{20, []int{1, 2, 3, 4, 5}} fmt.Printf("Address: %p, Value: %v\n", &p, p) passByValue(p, 1) fmt.Printf("Address: %p, Value: %v\n", &p, p)}func passByValue(copyOfP point, i int) { copyOfP.list = append(copyOfP.list[:i], copyOfP.list[i+1:]...) fmt.Printf("From passByValue Address: %p, Value: %v\n", ©OfP, copyOfP)}輸出：Original p Address: 0xc00000c080, Value: {20 [1 2 3 4 5]}passByValue copyOfP Address: 0xc00000c0c0, Value: {20 [1 3 4 5]}Original p Address: 0xc00000c080, Value: {20 [1 3 4 5 5]}不copyOfP應該是副本，p也不應該反映原來p的東西。這里發生了什么事？
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神不在的星期二
TA貢獻1963條經驗 獲得超6個贊
func main() {
// history.ReadlineTest()
p := point{20, []int{1, 2, 3, 4, 5}}
fmt.Printf("Address: %p, Value: %v\n", &p.list[0], p)
passByValue(p, 1)
fmt.Printf("Address: %p, Value: %v\n", &p.list[0], p)
}
func passByValue(copyOfP point, i int) {
copyOfP.list = append(copyOfP.list[:i], copyOfP.list[i+1:]...)
fmt.Printf("From passByValue Address: %p, Value: %v\n", ©OfP.list[0], copyOfP)
}
Address: 0xc00001a0c0, Value: {20 [1 2 3 4 5]}
From passByValue Address: 0xc00001a0c0, Value: {20 [1 3 4 5]}
Address: 0xc00001a0c0, Value: {20 [1 3 4 5 5]}
“列表”切片重用了相同的內存。
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