/** * This module provides utility functions for working with tuples in TypeScript. * * @since 2.0.0 */ import * as Equivalence from "./Equivalence.js"; import { dual } from "./Function.js"; import * as order from "./Order.js"; /** * Constructs a new tuple from the provided values. * * @example * ```ts * import * as assert from "node:assert" * import { make } from "effect/Tuple" * * assert.deepStrictEqual(make(1, 'hello', true), [1, 'hello', true]) * ``` * * @category constructors * @since 2.0.0 */ export const make = (...elements) => elements; /** * Return the first element of a tuple. * * @example * ```ts * import * as assert from "node:assert" * import { getFirst } from "effect/Tuple" * * assert.deepStrictEqual(getFirst(["hello", 42]), "hello") * ``` * * @category getters * @since 2.0.0 */ export const getFirst = self => self[0]; /** * Return the second element of a tuple. * * @example * ```ts * import * as assert from "node:assert" * import { getSecond } from "effect/Tuple" * * assert.deepStrictEqual(getSecond(["hello", 42]), 42) * ``` * * @category getters * @since 2.0.0 */ export const getSecond = self => self[1]; /** * Transforms each element of tuple using the given function, treating tuple homomorphically * * @example * ```ts * import * as assert from "node:assert" * import { pipe, Tuple } from "effect" * * const result = pipe( * ["a", 1, false] as const, * Tuple.map((el) => el.toString().toUpperCase()) * ) * assert.deepStrictEqual(result, ['A', '1', 'FALSE']) * ``` * * @category mapping * @since 3.9.0 */ export const map = /*#__PURE__*/dual(2, (self, fn) => self.map(element => fn(element))); /** * Transforms both elements of a tuple using the given functions. * * @example * ```ts * import * as assert from "node:assert" * import { mapBoth } from "effect/Tuple" * * assert.deepStrictEqual( * mapBoth(["hello", 42], { onFirst: s => s.toUpperCase(), onSecond: n => n.toString() }), * ["HELLO", "42"] * ) * ``` * * @category mapping * @since 2.0.0 */ export const mapBoth = /*#__PURE__*/dual(2, (self, { onFirst, onSecond }) => [onFirst(self[0]), onSecond(self[1])]); /** * Transforms the first component of a tuple using a given function. * * @example * ```ts * import * as assert from "node:assert" * import { mapFirst } from "effect/Tuple" * * assert.deepStrictEqual( * mapFirst(["hello", 42], s => s.toUpperCase()), * ["HELLO", 42] * ) * ``` * * @category mapping * @since 2.0.0 */ export const mapFirst = /*#__PURE__*/dual(2, (self, f) => [f(self[0]), self[1]]); /** * Transforms the second component of a tuple using a given function. * * @example * ```ts * import * as assert from "node:assert" * import { mapSecond } from "effect/Tuple" * * assert.deepStrictEqual( * mapSecond(["hello", 42], n => n.toString()), * ["hello", "42"] * ) * ``` * * @category mapping * @since 2.0.0 */ export const mapSecond = /*#__PURE__*/dual(2, (self, f) => [self[0], f(self[1])]); /** * Swaps the two elements of a tuple. * * @example * ```ts * import * as assert from "node:assert" * import { swap } from "effect/Tuple" * * assert.deepStrictEqual(swap(["hello", 42]), [42, "hello"]) * ``` * * @since 2.0.0 */ export const swap = self => [self[1], self[0]]; /** * Given a tuple of `Equivalence`s returns a new `Equivalence` that compares values of a tuple * by applying each `Equivalence` to the corresponding element of the tuple. * * @category combinators * @since 2.0.0 */ export const getEquivalence = Equivalence.tuple; /** * This function creates and returns a new `Order` for a tuple of values based on the given `Order`s for each element in the tuple. * The returned `Order` compares two tuples of the same type by applying the corresponding `Order` to each element in the tuple. * It is useful when you need to compare two tuples of the same type and you have a specific way of comparing each element * of the tuple. * * @category combinators * @since 2.0.0 */ export const getOrder = order.tuple; /** * Appends an element to the end of a tuple. * * @category concatenating * @since 2.0.0 */ export const appendElement = /*#__PURE__*/dual(2, (self, that) => [...self, that]); /** * Retrieves the element at a specified index from a tuple. * * @example * ```ts * import * as assert from "node:assert" * import { Tuple } from "effect" * * assert.deepStrictEqual(Tuple.at([1, 'hello', true], 1), 'hello') * ``` * * @category getters * @since 3.4.0 */ export const at = /*#__PURE__*/dual(2, (self, index) => self[index]); export { /** * Determine if an `Array` is a tuple with exactly `N` elements, narrowing down the type to `TupleOf`. * * An `Array` is considered to be a `TupleOf` if its length is exactly `N`. * * @example * ```ts * import * as assert from "node:assert" * import { isTupleOf } from "effect/Tuple" * * assert.deepStrictEqual(isTupleOf([1, 2, 3], 3), true); * assert.deepStrictEqual(isTupleOf([1, 2, 3], 2), false); * assert.deepStrictEqual(isTupleOf([1, 2, 3], 4), false); * * const arr: number[] = [1, 2, 3]; * if (isTupleOf(arr, 3)) { * console.log(arr); * // ^? [number, number, number] * } * * ``` * @category guards * @since 3.3.0 */ isTupleOf, /** * Determine if an `Array` is a tuple with at least `N` elements, narrowing down the type to `TupleOfAtLeast`. * * An `Array` is considered to be a `TupleOfAtLeast` if its length is at least `N`. * * @example * ```ts * import * as assert from "node:assert" * import { isTupleOfAtLeast } from "effect/Tuple" * * assert.deepStrictEqual(isTupleOfAtLeast([1, 2, 3], 3), true); * assert.deepStrictEqual(isTupleOfAtLeast([1, 2, 3], 2), true); * assert.deepStrictEqual(isTupleOfAtLeast([1, 2, 3], 4), false); * * const arr: number[] = [1, 2, 3, 4]; * if (isTupleOfAtLeast(arr, 3)) { * console.log(arr); * // ^? [number, number, number, ...number[]] * } * * ``` * @category guards * @since 3.3.0 */ isTupleOfAtLeast } from "./Predicate.js"; //# sourceMappingURL=Tuple.js.map