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Module

std/collections/partition_entries.ts>partitionEntries

Deno standard library
denoland/deno_std
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function partitionEntries
import { partitionEntries } from "https://deno.land/std@0.190.0/collections/partition_entries.ts";

Returns a tuple of two records with the first one containing all entries of the given record that match the given predicate and the second one containing all that do not.

Examples

Example 1

import { partitionEntries } from "https://deno.land/std@0.190.0/collections/partition_entries.ts";
import { assertEquals } from "https://deno.land/std@0.190.0/testing/asserts.ts";

const menu = {
  "Salad": 11,
  "Soup": 8,
  "Pasta": 13,
} as const;
const myOptions = partitionEntries(
  menu,
  ([item, price]) => item !== "Pasta" && price < 10,
);

assertEquals(
  myOptions,
  [
    { "Soup": 8 },
    { "Salad": 11, "Pasta": 13 },
  ],
);

Parameters

record: Readonly<Record<string, T>>
predicate: (entry: [string, T]) => boolean

Returns

[Record<string, T>, Record<string, T>]