Function keys

src/util.js:119–130

(object)

 * @return {Array}
 */
export function keys(object) {
    const locations = [];

    for (const location in object) {
        if (object.hasOwnProperty(location)) {
            locations.push(location);
        }
    }

    // numeric descending
    return locations.sort((a, b) => b - a);
}

/**
 * Substring replace call to replace part of a string at a certain position