react repeat component

Repeat.js

/**
 * usage:
 *     <ul>
 *         <Repeat times="3">
 *             <li>item</li>
 *         </Repeat>
 *     </ul>
 * or
 *     <ul>
 *         <Repeat
 *             times={3}
 *             component={i => (
 *                 <li key={i}>item {i}</li>
 *             )}
 *         />
 *     </ul>
 */
function Repeat({ children, component, times }) {
    const _times = typeof times === "string" ? parseInt(times) : times;
    const mapper = children ? () => children : (_, i) => component(i);
    return new Array(_times).fill().map(mapper);
}