题解 | #查找元素位置#

{"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 findAllOccurrences(arr, target) {\r\n    return arr.map((item, index) => {\r\n        return item === target ? index : -1;\r\n    }).filter(item => item !== -1);\r\n}"}