gotilty / gotil

package internal

import (

	"fmt"

	"reflect"

)

// IsNotAssigned checks the given parameter has not value also if it's slice or array that checks has not any element.

// It works same IsEmpty()

// Example:

// 		result := IsNotAssigned("test data")

// 		// Output: false

func IsNotAssigned(a interface{}) bool {

	if a == nil {

		return true

	}

	val := reflect.ValueOf(a)

	switch val.Kind() {

	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:

		return (val.Int()) == 0

	case reflect.Float32, reflect.Float64:

		return (val.Float()) == 0.0

	case reflect.String:

		return (fmt.Sprintf("%s", a)) == ""

	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:

		return (val.Uint()) == 0

	case reflect.Bool:

		return !(val.Bool())

	case reflect.Chan, reflect.Func, reflect.Struct, reflect.UnsafePointer:

		tt := reflect.Zero(val.Type())

		return reflect.DeepEqual(val, tt)

	case reflect.Array, reflect.Slice:

		return val.Len() == 0

	default:

		return false