mapValues

function

function mapValues<T, O, K extends string>(record: Readonly<Record<K, T>>, transformer: (value: T, key: K) => O): Record<K, O>

Applies the given transformer to all values in the given record and returns a new record containing the resulting keys associated to the last value that produced them.

record: Readonly<Record<K, T>>

The record to map values from.

transformer: (value: T, key: K) => O

The function to transform each value.

Returns

A new record with all values transformed by the given transformer.

import { mapValues } from "@ende/collections/map-values";
import { assertEquals } from "@ende/assert";

const usersById = {
  a5ec: { name: "Mischa" },
  de4f: { name: "Kim" },
};
const namesById = mapValues(usersById, (user) => user.name);

assertEquals(
  namesById,
  {
    a5ec: "Mischa",
    de4f: "Kim",
  },
);

function

function mapValues<T, O, K extends string>(record: Readonly<Partial<Record<K, T>>>, transformer: (value: T, key: K) => O): Partial<Record<K, O>>

Applies the given transformer to all values in the given record and returns a new record containing the resulting keys associated to the last value that produced them.

record: Readonly<Partial<Record<K, T>>>

The record to map values from.

transformer: (value: T, key: K) => O

The function to transform each value.

Returns

A new record with all values transformed by the given transformer.

import { mapValues } from "@ende/collections/map-values";
import { assertEquals } from "@ende/assert";

const usersById = {
  "a5ec": { name: "Mischa" },
  "de4f": { name: "Kim" },
};
const namesById = mapValues(usersById, (user) => user.name);

assertEquals(
  namesById,
  {
    "a5ec": "Mischa",
    "de4f": "Kim",
  },
);

function

function mapValues<T, O, K extends string>(record: Record<K, T>, transformer: (value: T, key: K) => O): any