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30 lines
956 B
TypeScript
30 lines
956 B
TypeScript
/// <reference path="scalike.d.ts" />
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import {Optional, Some, None, Try, Right, Left, Either, Future} from "scalike";
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// Optional
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Optional(1).map(x => x + 1); // Some(2)
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Optional(null).map(x => x + 1); // None
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Optional(undefined).map(x => x + 1); // None
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Optional(1).flatMap(x => Some(x + 1)).fold(0, x => x + 1); // 3
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// Try
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function something() { return 1; }
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Try(something); // Success(1)
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function throwError() { throw new Error; }
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Try(throwError); // Failure(Error)
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Try(() => 1).map(x => x + 1); // Success(2)
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// Either
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function validate(x: number): Either<string, number> {
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return x !== 1 ? Left<string, number>('this is not 1') : Right<string, number>(x);
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}
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validate(1).right().getOrElse(0); // 1
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validate(2).left().getOrElse("err"); // "this is not 1"
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// Future
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Future(something).map(x => x + 1); // Future(2)
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Future.successful(1).value; // Optional(Success(1)
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const fu = Future(something);
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Future.sequence([fu, fu, fu]); // Future([1, 1, 1])
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