Golang check if interface value is nil

nil_check.go

package main

import (
	"fmt"
	"reflect"
)

func main() {
	var v *string
	fmt.Println(isNil(v)) // true
}

func isNil(v interface{}) bool {
	return v == nil || (reflect.ValueOf(v).Kind() == reflect.Ptr && reflect.ValueOf(v).IsNil())
}

The above func does not work for slices, etc. A better version that includes all needed kinds of 'Kinds':

func IsNil(v interface{}) bool {
	if v == nil {
		return true
	}
	val := reflect.ValueOf(v)
	switch val.Kind() {
	case reflect.Chan, reflect.Func, reflect.Map, reflect.Pointer, reflect.UnsafePointer, reflect.Interface, reflect.Slice:
		return val.IsNil()
	}
	return false
}