传递 切片
func g(l []int) {
l[2] = 123
ll := l
ll[2] = 456
if ll != nil {
} l3 := []int{6, 7, 8} l = l3
}
func g1(m map[int]int) { m[2] = 123 mm := m mm[2] = 456 if mm != nil {
} m3 := map[int]int{2: 999} m = m3 }
} l3 := []int{6, 7, 8} l = l3
}
func g1(m map[int]int) { m[2] = 123 mm := m mm[2] = 456 if mm != nil {
} m3 := map[int]int{2: 999} m = m3 }