My Typescript Utility Library.
Represents a option value. An instance of Option object is either a Some or None object.
import { Some, None } from "../src/Option";
//create some
const some = Some(10);
//isDefined
console.log(some.isDefined);
//isEmpty
console.log(some.isEmpty);
//getOrElse
console.log(some.getOrElse(0));
//fold
some.fold<void>(
() => {
//if option is empty then callback this func.
},
(v: number) => {
//if option is defined then call this func.
}
);
//map
some.map<string>((v: number) => {
return v.toString();
});
//flatMap
some.flatMap<string>(v => {
return Some(v.toString());
});
The Either type represents values with two possibilities. A value of type Either<T, U> is either Left T type or Right U type.
import { Left, Right } from "../src/Either";
//create right
const either = Right(10);
//isLeft
console.log(either.isLeft());
//isRight
console.log(either.isRight());
//getOrElse
console.log(either.getOrElse(0));
//fold
either.fold<void>(
() => {
//if option is empty then callback this func.
},
(v: number) => {
//if option is defined then call this func.
}
);
//map
either.map<string>((v: number) => {
return v.toString();
});
//flatMap
either.flatMap<string>(v => {
return Some(v.toString());
});