import { distinctBy } from "https://deno.land/std@0.194.0/collections/mod.ts";
Returns all elements in the given array that produce a distinct value using the given selector, preserving order by first occurrence.
Examples
Example 1
Example 1
import { distinctBy } from "https://deno.land/std@0.194.0/collections/distinct_by.ts";
import { assertEquals } from "https://deno.land/std@0.194.0/testing/asserts.ts";
const names = ["Anna", "Kim", "Arnold", "Kate"];
const exampleNamesByFirstLetter = distinctBy(names, (it) => it.charAt(0));
assertEquals(exampleNamesByFirstLetter, ["Anna", "Kim"]);