Function arrayDiff

src/utils/general.js:571–578

(arr1, arr2)

 * @param {any[]} arr2
 */
export const arrayDiff = (arr1, arr2) => {
    const a = arr1 || [];
    const b = arr2 || [];

    return a
        .filter(x => !elContains(b, x))
        .concat(b.filter(x => !elContains(a, x)));
};

/**
 * Calculate "accept type"