package common

import (
	"reflect"
)

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

// IsMap checks if some variable is a map
func IsMap(o interface{}) bool {
	if o == nil {
		return false
	}
	return reflect.ValueOf(o).Kind() == reflect.Map
}

// IsSlice checks if some variable is a slice
func IsSlice(o interface{}) bool {
	if o == nil {
		return false
	}
	return reflect.ValueOf(o).Kind() == reflect.Slice
}