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std/collections/distinct.ts

Deno standard library
denoland/deno_std
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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
/** * Returns all distinct elements in the given array, preserving order by first occurence * * Example: * * ```ts * import { distinct } from "./distinct.ts"; * import { assertEquals } from "../testing/asserts.ts"; * * const numbers = [ 3, 2, 5, 2, 5 ] * const distinctNumbers = distinct(numbers) * * assertEquals(distinctNumbers, [ 3, 2, 5 ]) * ``` */export function distinct<T>(array: readonly T[]): T[] {  const set = new Set(array);
  return Array.from(set);}