import { groupBy } from "https://deno.land/std@0.177.0/collections/mod.ts";
Applies the given selector to each element in the given array, returning a Record containing the results as keys and all values that produced that key as values.
Examples
Example 1
Example 1
import { groupBy } from "https://deno.land/std@0.177.0/collections/group_by.ts";
import { assertEquals } from "https://deno.land/std@0.177.0/testing/asserts.ts";
const people = [
{ name: "Anna" },
{ name: "Arnold" },
{ name: "Kim" },
];
const peopleByFirstLetter = groupBy(people, (it) => it.name.charAt(0));
assertEquals(
peopleByFirstLetter,
{
"A": [{ name: "Anna" }, { name: "Arnold" }],
"K": [{ name: "Kim" }],
},
);