Usage

intersects([1, 2, 3], [4, 5, 6]);
// false

intersects([1, 0, 0], [0, 1], (n) => n > 1);
// true

Installation

CLI

npx atmx add helper intersects

Manually

Copy and paste the following method into @/utils/helpers/undefined.ts:

/**
* Given two arrays, returns true if any elements intersect.
*
* @example
* intersects([1, 2, 3], [4, 5, 6])
* // false
*
* intersects([1, 0, 0], [0, 1], (n) => n > 1)
* // true
*/
export function intersects<T, K>(
listA: readonly T[],
listB: readonly T[],
identity?: (t: T) => K,
): boolean {
if (!listA || !listB) {
return false;
}
if (identity) {
const known = new Set(listA.map(identity));
return listB.some((item) => known.has(identity(item)));
}
return listB.some((item) => listA.includes(item));
}