array-like/reduce

/**
 * All.
 *
 * @param {ArrayLike} a
 * @param {number} i
 * @param {number} j
 * @return {boolean}
 */
const all = (a, i, j) => {
    for (; i < j; ++i) {
        if (!a[i]) {
            return false;
        }
    }

    return true;
};

export default all;