optional

Documentation

Index

• type Optional
  • func None() Optional
  • func OfNullable(v interface{}) Optional
  • func OfZeroable(v interface{}) Optional
  • func Some(v interface{}) Optional
  • func (o Optional) Filter(predicate func(value interface{}) bool) Optional
  • func (o Optional) FlatMap(mapper func(value interface{}) Optional) Optional
  • func (o Optional) Map(mapper func(value interface{}) interface{}) Optional
  • func (o Optional) OrElse(otherValue interface{}) interface{}
  • func (o Optional) OrElseGet(supplier func() interface{}) interface{}
  • func (o Optional) ToString() string

Types

type Optional

type Optional struct {
	IsNone bool
	IsSome bool
	Value  interface{}
}

func None

func None() Optional

func OfNullable

func OfNullable(v interface{}) Optional

如果值为nil则返回None

func OfZeroable

func OfZeroable(v interface{}) Optional

如果值为nil、0、空字符串、零长度的array、slice、map则返回None

func Some

func Some(v interface{}) Optional

func (Optional) Filter

func (o Optional) Filter(predicate func(value interface{}) bool) Optional

func (Optional) FlatMap

func (o Optional) FlatMap(mapper func(value interface{}) Optional) Optional

func (Optional) Map

func (o Optional) Map(mapper func(value interface{}) interface{}) Optional

func (Optional) OrElse

func (o Optional) OrElse(otherValue interface{}) interface{}

func (Optional) OrElseGet

func (o Optional) OrElseGet(supplier func() interface{}) interface{}

func (Optional) ToString

func (o Optional) ToString() string