2022-10-31：以下go語言代碼輸出什麼？A：map[]；B：nil；C：Panic；D：編譯錯誤。
package main
import "fmt"
func main() {
var m map[string]int
delete(m, "oh noes!")
fmt.Println(m)
}
答案選A。在 delete 函數的文檔有說明：The delete built-in function deletes the element with the specified key (m[key]) from the map. If m is nil or there is no such element, delete is a no-op.這意思是沒有元素的時候，啥都不做。
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