either

func Filter ¶

func Filter[L, R any](e lang.Either[L, R], f func(R) bool) lang.Either[L, R]

func FlatMap ¶

func FlatMap[L, R, R1 any](e lang.Either[L, R], f func(R) lang.Either[L, R1]) lang.Either[L, R1]

FlatMap is a right biased flat map that applies the given function to the right value of the Either instance.

func FlatMapLeft ¶

func FlatMapLeft[L, R, L1 any](e lang.Either[L, R], f func(L) lang.Either[L1, R]) lang.Either[L1, R]

FlatMapLeft is a left biased flat map that applies the given function to the left value of the Either instance.

func Flatten ¶

func Flatten[L, R any](e lang.Either[L, lang.Either[L, R]]) lang.Either[L, R]

Flatten returns the right value of the Either instance if it is right. Otherwise, it returns the right value of the inner Either instance.

func ForEach ¶

func ForEach[L, R any](e lang.Either[L, R], f func(R))

func FromOption ¶

func FromOption[L, R any](o lang.Option[R], l L) lang.Either[L, R]

FromOption converts an Option instance to an Either instance. If the Option instance is empty, the left value is returned. Otherwise, the right value is returned.

func Left ¶

func Left[L, R any](le L) lang.Either[L, R]

Left returns an Either instance with the given left value.

func Map ¶

func Map[L, R, R1 any](e lang.Either[L, R], f func(R) R1) lang.Either[L, R1]

Map is a right biased map that applies the given function to the right value of the Either instance.

func MapLeft ¶

func MapLeft[L, R, L1 any](e lang.Either[L, R], f func(L) L1) lang.Either[L1, R]

MapLeft is a left biased map that applies the given function to the left value of the Either instance.

func OrElse ¶

func OrElse[L, R any](e lang.Either[L, R], f func() lang.Either[L, R]) lang.Either[L, R]

OrElse returns the given Either if it is right. Otherwise, it returns the result of the given function.

func Right ¶

func Right[L, R any](ri R) lang.Either[L, R]

Right returns an Either instance with the given right value.

func Sequence ¶

func Sequence[L, R any](es []lang.Either[L, R]) lang.Either[L, []R]

Sequence returns an Either instance with the right value as a slice of the right values of the given Either instances. If any of the given Either instances is left, the left value is returned.