d2-ui
Version:
26 lines (24 loc) • 828 B
JavaScript
import arrayUnique from './arrayUnique';
import arrayContains from './arrayContains';
/**
*
* @param {Array} array1
* @param {Array} array2
* @param {boolean} biDirectional False returns A-B while true returns A-B concat B-A
* @returns {Array}
*
* @throws {TypeError} When `filter` can not be found on `array`. This generally happens when the array is `null` or `undefined`
*
* @example
* const a = [1, 2];
* const b = [1, 3];
* difference(a, b) // returns: [2]
* difference(a, b, true) // returns: [2, 3]
*/
export default function arrayDifference(array1, array2, biDirectional) {
return arrayUnique(array1.filter(function(item) {
return !arrayContains(array2, item);
}).concat(biDirectional === true ? array2.filter(function(item) {
return !arrayContains(array1, item);
}) : []));
}