Maths
isSubsetOf

Returns a boolean indicating if all elements of this set are in the given set.

The set can be either an Array or Set.

💡

The subset relationship can determined by passing boolean value to the proper param.

Venn Diagram

Related

Syntax

import { isSubsetOf } from '@opentf/std';
 
isSubsetOf(
  a: unknown[] | Set<unknown>,
  b: unknown[] | Set<unknown>,
  proper = false
): boolean

Examples

const a = [1, 2, 3];
 
isSubsetOf([], a) //=> true
 
isSubsetOf([1], a) //=> true
 
isSubsetOf([1, 2], a) //=> true
 
isSubsetOf([1, 2, 3], a) //=> true
 
const fours = new Set([4, 8, 12, 16]);
const evens = new Set([2, 4, 6, 8, 10, 12, 14, 16, 18]);
 
isSubsetOf(fours, evens) //=> true
 
isSubsetOf([1, 2, 3, 4, 5], a) //=> false
 
const primes = new Set([2, 3, 5, 7, 11, 13, 17, 19]);
const odds = new Set([3, 5, 7, 9, 11, 13, 15, 17, 19]);
 
isSubsetOf(primes, odds) //=> false
 
const set1 = new Set([1, 2, 3]);
const set2 = new Set([1, 2, 3]);
const set3 = new Set([1, 2]);
 
isSubsetOf(set1, set2) //=> true
 
isSubsetOf(set1, set2, false) //=> true
 
isSubsetOf(set1, set2, true) //=> false
 
isSubsetOf(set1, set3, true) //=> true

Try

isOddisSupersetOf