mapEntries | /collections/mod.ts | std@0.181.0

function mapEntries

import { mapEntries } from "https://dotland.deno.dev/std@0.181.0/collections/mod.ts";

mapEntries<T, O>(record: Readonly<Record<string, T>>, transformer: (entry: [string, T]) => [string, O]): Record<string, O>

Applies the given transformer to all entries in the given record and returns a new record containing the results.

Examples

Example 1

import { mapEntries } from "https://deno.land/std@0.181.0/collections/map_entries.ts";
import { assertEquals } from "https://deno.land/std@0.181.0/testing/asserts.ts";

const usersById = {
  "a2e": { name: "Kim", age: 22 },
  "dfe": { name: "Anna", age: 31 },
  "34b": { name: "Tim", age: 58 },
} as const;
const agesByNames = mapEntries(usersById, ([id, { name, age }]) => [name, age]);

assertEquals(
  agesByNames,
  {
    "Kim": 22,
    "Anna": 31,
    "Tim": 58,
  },
);

Type Parameters

Parameters

record: Readonly<Record<string, T>>

transformer: (entry: [string, T]) => [string, O]

Returns

Record<string, O>

import mapEntries

import { mapEntries } from "https://dotland.deno.dev/std@0.181.0/collections/mod.ts";