intersects

Simple helper that check if two lists shared at least an item in common. null and undefined are treated as empty arrays and return false.

Available since v1.0.0

Import

import { intersects } from '@helpers4/array';
// or, from the all-in-one package (same code, one install):
import { intersects } from 'helpers4/array';

Signature

intersects<T>(a: readonly T[] | null | undefined, b: readonly T[] | null | undefined): boolean

Parameters

Parameter	Type	Description
a	readonly T[] | null | undefined	One list
b	readonly T[] | null | undefined	Another list

Returns

boolean — true if one item is in common, false otherwise.

Examples

Detect shared element

Returns true when at least one element is shared between both arrays.

intersects([1, 2, 3], [3, 4, 5])
// => true

No common elements

Returns false when no elements are shared.

intersects([1, 2], [3, 4])
// => false

Source

View source on GitHub