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set-operations

jsr denoland deno doc Test

This module provides basic set operations. Most of codes are just translated from JavaScript code in MDN to TypeScript.

Usage

isDisjoint

Check if the setA has no elements in common with setB.

import { assertEquals } from "https://deno.land/std/assert/mod.ts";
import { isDisjoint } from "https://deno.land/x/set_operations@v1.2.0/mod.ts";

Deno.test("isDisjoint works properly", () => {
  assertEquals(isDisjoint(new Set("abc"), new Set("def")), true);
  assertEquals(isDisjoint(new Set("abc"), new Set("cde")), false);
});

isSubset

Check if every elements in setA is in the setB.

import { assertEquals } from "https://deno.land/std/assert/mod.ts";
import { isSubset } from "https://deno.land/x/set_operations@v1.2.0/mod.ts";

Deno.test("isSubset works properly", () => {
  assertEquals(isSubset(new Set("abc"), new Set("abcdef")), true);
  assertEquals(isSubset(new Set("abc"), new Set("def")), false);
  assertEquals(isSubset(new Set("abcdef"), new Set("abc")), false);
});

isSuperset

Check if every elements in setB is in the setA.

import { assertEquals } from "https://deno.land/std/assert/mod.ts";
import { isSuperset } from "https://deno.land/x/set_operations@v1.2.0/mod.ts";

Deno.test("isSuperset works properly", () => {
  assertEquals(isSuperset(new Set("abc"), new Set("abcdef")), false);
  assertEquals(isSuperset(new Set("abc"), new Set("def")), false);
  assertEquals(isSuperset(new Set("abcdef"), new Set("abc")), true);
});

union

Create a new set with elements from the setA and the setB.

import { assertEquals } from "https://deno.land/std/assert/mod.ts";
import { union } from "https://deno.land/x/set_operations@v1.2.0/mod.ts";

Deno.test("union works properly", () => {
  assertEquals(union(new Set("abc"), new Set("def")), new Set("abcdef"));
  assertEquals(union(new Set("abcdef"), new Set("def")), new Set("abcdef"));
  assertEquals(union(new Set("abc"), new Set("abcdef")), new Set("abcdef"));
});

intersection

Create a new set with elements common to the setA and the setB.

import { assertEquals } from "https://deno.land/std/assert/mod.ts";
import { intersection } from "https://deno.land/x/set_operations@v1.2.0/mod.ts";

Deno.test("intersection works properly", () => {
  assertEquals(intersection(new Set("abc"), new Set("def")), new Set());
  assertEquals(intersection(new Set("abcdef"), new Set("def")), new Set("def"));
  assertEquals(intersection(new Set("abc"), new Set("abcdef")), new Set("abc"));
});

difference

Create a new set with elements in the setA that are not in the setB.

import { assertEquals } from "https://deno.land/std/assert/mod.ts";
import { difference } from "https://deno.land/x/set_operations@v1.2.0/mod.ts";

Deno.test("difference works properly", () => {
  assertEquals(difference(new Set("abc"), new Set("def")), new Set("abc"));
  assertEquals(difference(new Set("abcdef"), new Set("def")), new Set("abc"));
  assertEquals(difference(new Set("abc"), new Set("abcdef")), new Set());
});

symmetricDifference

Create a new set with elements in either the setA or setB but not both.

import { assertEquals } from "https://deno.land/std/assert/mod.ts";
import { symmetricDifference } from "https://deno.land/x/set_operations@v1.2.0/mod.ts";

Deno.test("symmetricDifference works properly", () => {
  assertEquals(
    symmetricDifference(new Set("abc"), new Set("def")),
    new Set("abcdef"),
  );
  assertEquals(
    symmetricDifference(new Set("abcdef"), new Set("def")),
    new Set("abc"),
  );
  assertEquals(
    symmetricDifference(new Set("abc"), new Set("abcdef")),
    new Set("def"),
  );
});

License

The code follows MIT license written in LICENSE. Contributors need to agree that any modifications sent in this repository follow the license.