How to determine whether a pointer is null in golang

Golang’s method of determining whether a pointer is empty:

1. When you know the type, you can naturally use type assertions and then determine whether it is empty. For example, ai, ok := i.(*int), and then judge ai == nil.

2. If I don’t know what type of pointer it is, I have to use reflection vi := reflect.ValueOf(i), and then use vi.IsNil() to judge. But if i is not a pointer, an exception will occur when calling IsNil. You may need to write a function like this to detect null

func IsNil(i interface{}) bool { defer func() { recover() }() vi := reflect.ValueOf(i) return vi.IsNil() }

But it is really not good-looking to impose a defer recover like this, so I use type judgment. It becomes like this

func IsNil(i interface{}) bool { vi := reflect.ValueOf(i) if vi.Kind() == reflect.Ptr { return vi.IsNil() } return false }

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