Left<L, R> class
Constructors
-
Left(L _value)
-
const
Properties
-
hashCode
→ int
-
The hash code for this object.
no setteroverride
-
runtimeType
→ Type
-
A representation of the runtime type of the object.
no setterinherited
-
value
→ L
-
Extract the value of type
L inside the Left.
no setter
Methods
-
all(bool predicate(R a))
→ bool
-
Return the result of
predicate applied to the value of Right.
If the Either is Left, returns true.
inherited
-
alt(covariant Either<L, R> orElse())
→ Either<L, R>
-
Return the current Either if it is a Right, otherwise return the result of
orElse.
override
-
andThen<R2>(covariant Either<L, R2> then())
→ Either<L, R2>
-
If this Either is a Right, then return the result of calling
then.
Otherwise return Left.
inherited
-
any(bool predicate(R a))
→ bool
-
Return the result of
predicate applied to the value of Right.
If the Either is Left, returns false.
inherited
-
ap<C>(covariant Either<L, C Function(R r)> a)
→ Either<L, C>
-
Apply the function contained inside
a to change the value on the Right from
type R to a value of type C.
inherited
-
bimap<C, D>(C mLeft(L l), D mRight(R b))
→ Either<C, D>
-
Define two functions to change both the Left and Right value of the
Either.
inherited
-
bind<R2>(Either<L, R2> f(R r))
→ Either<L, R2>
-
Used to chain multiple functions that return a Either.
inherited
-
bindFuture<R2>(Future<Either<L, R2>> f(R r))
→ TaskEither<L, R2>
-
Used to chain multiple functions that return a
Future<Either>.
override
-
call<B>(covariant Either<L, B> chain)
→ Either<L, B>
-
Chain multiple functions having the same left type
L.
inherited
-
chainFirst<C>(covariant Either<L, C> chain(R b))
→ Either<L, R>
-
Chain a request that returns another Either, execute it, ignore
the result, and return the same value as the current Either.
inherited
-
concatenate(Monoid<R> monoid)
→ R
-
Use
monoid to combine the value of Right.
inherited
-
duplicate()
→ Either<L, Either<L, R>>
-
Wrap this Either inside another Either.
inherited
-
elem(R r, Eq<R> eq)
→ bool
-
Return
true when value of r is equal to the value inside this Either.
If this Either is Left, then return false.
override
-
exists(bool predicate(R a))
→ bool
-
Return the result of calliing
predicate with the value of Either if it is a Right.
Otherwise return false.
override
-
extend<Z>(Z f(Either<L, R> t))
→ Either<L, Z>
-
Change the value of Either from type
R to type Z based on the
value of Either<L, R> using function f.
override
-
filterOrElse(bool f(R a), L onFalse(R r))
→ Either<L, R>
-
If
f applied on this Either as Right returns true, then return this Either.
If it returns false, return the result of onFalse in a Left.
inherited
-
flatMap<C>(covariant Either<L, C> f(R a))
→ Either<L, R2>
-
Used to chain multiple functions that return a Either.
override
-
fold<C>(C onLeft(L l), C onRight(R r))
→ C
-
Execute
onLeft when value is Left, otherwise execute onRight.
inherited
-
foldLeft<C>(C b, C f(C acc, R b))
→ C
-
This method folds the value from left to right.
inherited
-
foldLeftWithIndex<C>(C c, C f(int i, C acc, R b))
→ C
-
Return the result of
f called with b and the value of Right.
If this Either is Left, return b.
inherited
-
foldMap<C>(Monoid<C> monoid, C f(R b))
→ C
-
Use
monoid to combine the value of Right applied to f.
inherited
-
foldRight<C>(C b, C f(C acc, R a))
→ C
-
This method folds the value from right to left.
override
-
foldRightWithIndex<C>(C c, C f(int i, C acc, R b))
→ C
-
Return the result of
f called with b and the value of Right.
If this Either is Left, return b.
inherited
-
getLeft()
→ Option<L>
-
Extract the value from Left in a Option.
override
-
getOrElse(R orElse(L l))
→ R
-
Return the value inside this Either if it is a Right.
Otherwise return result of
onElse.
override
-
getRight()
→ Option<R>
-
Extract the value from Right in a Option.
inherited
-
isLeft()
→ bool
-
Return
true when this Either is Left.
override
-
isRight()
→ bool
-
Return
true when this Either is Right.
override
-
length()
→ int
-
Returns
1 when Either is Right, 0 otherwise.
inherited
-
map<C>(C f(R a))
→ Either<L, C>
-
If the Either is Right, then change its value from type
R to
type C using function f.
override
-
map2<C, D>(covariant Either<L, C> m1, D f(R b, C c))
→ Either<L, D>
-
Change type of this Either based on its value of type
R and the
value of type C of another Either.
override
-
map3<C, D, E>(covariant Either<L, C> m1, covariant Either<L, D> m2, E f(R b, C c, D d))
→ Either<L, E>
-
Change type of this Either based on its value of type
R, the
value of type C of a second Either, and the value of type D
of a third Either.
override
-
mapLeft<C>(C f(L a))
→ Either<C, R>
-
If the Either is Left, then change its value from type
L to
type C using function f.
override
-
match<C>(C onLeft(L l), C onRight(R r))
→ C
-
Execute
onLeft when value is Left, otherwise execute onRight.
override
-
noSuchMethod(Invocation invocation)
→ dynamic
-
Invoked when a nonexistent method or property is accessed.
inherited
-
orElse<L1>(Either<L1, R> onLeft(L l))
→ Either<L1, R>
-
If this Either is Left, return the result of
onLeft.
override
-
pure<C>(C c)
→ Either<L, C>
-
Return a Right containing the value
c.
inherited
-
swap()
→ Either<R, L>
-
Swap the values contained inside the Left and Right of this Either.
override
-
toIOEither()
→ IOEither<L, R>
-
Convert this Either to a IOEither.
override
-
toNullable()
→ R?
-
Convert Either to nullable
R?.
override
-
toOption()
→ Option<R>
-
Convert this Either to a Option:
override
-
toString()
→ String
-
A string representation of this object.
override
-
toTaskEither()
→ TaskEither<L, R>
-
Convert this Either to a TaskEither.
override
