This topic created in 1239 days ago, the information mentioned may be changed or developed.
func testMatrix(res *[][]int) {
r := *res
r = append(r, []int{1, 2, 3})
}
fun main(){
res := make([][]int, 0)
testMatrix(&res)
fmt.Println(res)
}
这个 res 为啥是空的 []
6 replies • 2022-12-09 16:02:14 +08:00
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1
Mitt Dec 9, 2022
因为 append 会生成新的 slice
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2
Mitt Dec 9, 2022
正确的做法是 *res = append(*res, []int{1, 2, 3})
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4
lazydog Dec 9, 2022
你可以打印下地址看看，就知道结果了。
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