Left<L, R> class

Used for "failure"

Inheritance

• Object
• Either<L, R>
• Left

Constructors

Left(L value)

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

isLeft → bool

Represents the left side of Either class which by convention is a "Failure".

no setter, inherited

isRight → bool

Represents the right side of Either class which by convention is a "Success"

no setter, inherited

left → L

Get Left value, may throw an exception when the value is Right

no setter, inherited

right → R

Get Right value, may throw an exception when the value is Left

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

value → L

final

Methods

either<TL, TR>(TL fnL(L left), TR fnR(R right)) → Either<TL, TR>

Transform values of Left and Right

override

fold<T>(T fnL(L left), T fnR(R right)) → T

Fold Left and Right into the value of one type

override

map<TR>(TR fnR(R right)) → Either<L, TR>

Transform value of Right

override

mapAsync<TR>(FutureOr<TR> fnR(R right)) → Future<Either<L, TR>>

Transform value of Right

override

mapLeft<TL>(TL fnL(L left)) → Either<TL, R>

Transform value of Left

override

mapLeftAsync<TL>(FutureOr<TL> fnL(L left)) → Future<Either<TL, R>>

Transform value of Left

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

swap() → Either<R, L>

Swap Left and Right

inherited

then<TR>(Either<L, TR> fnR(R right)) → Either<L, TR>

Transform value of Right when transformation may be finished with an error

override

thenAsync<TR>(FutureOr<Either<L, TR>> fnR(R right)) → Future<Either<L, TR>>

Transform value of Right when transformation may be finished with an error

override

thenLeft<TL>(Either<TL, R> fnL(L left)) → Either<TL, R>

Transform value of Left when transformation may be finished with an Right

override

thenLeftAsync<TL>(FutureOr<Either<TL, R>> fnL(L left)) → Future<Either<TL, R>>

Transform value of Left when transformation may be finished with an Right

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object obj) → bool

The equality operator.

inherited