{"html":"<!-- 请在此处编写你的代码 -->\\n<!-- <div id=\"app\"> Hello Nowcoder </div> -->","css":"/* html, body {\\n\\twidth: 100%;\\n\\theight: 100%;\\n\\tmargin: 0;\\n\\tpadding: 0;\\n} */","js":"function truncate(arr) {\n   const a =[...arr]\n   a.splice(arr.length - 1, 1)\n    return a\n}\n"}