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@std/collections@0.215.0

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It is unknown whether this package works with Browsers
It is unknown whether this package works with Deno
It is unknown whether this package works with Node.js
It is unknown whether this package works with Cloudflare Workers
It is unknown whether this package works with Bun
•JSR Score70%•
Downloads1/wk
•
Published2 years ago (0.215.0)
function mapEntries
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 "@std/collections/map_entries";
import { assertEquals } from "@std/assert/assert_equals";

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

T
O

Parameters

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

Return Type

Record<string, O>

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Add Package

deno add jsr:@std/collections

Import symbol

import { mapEntries } from "@std/collections/map_entries";
or

Import directly with a jsr specifier

import { mapEntries } from "jsr:@std/collections/map_entries";