javascript - 获取数组中搜索结果的索引

Question

我有以下代码:

var member_data_list = [
  ["adrian", "test", Number(9)],
  ["supler", "test", Number(2.3)],
  ["franz", "test", Number(2.5)],
  ["drucker", "test", Number(9.6)],
];

if (exists(member_data_list, "franz")) {
     //HERE I NEED TO GET THE INDEX OF MEMBER_DATA_LIST[?]
     //EXAMPLE: if (exists(member_data_list, "franz")) => RESULT => 2 (MEMBER_DATA_LIST[2])
     console.log("NAME IS IN ARRAY AT INDEX " + "?");
}
        
function exists(arr, search) {
   return arr.some(row => row.includes(search));
}

如何获取该数组中名称的索引？

Answer 1

一种解决方案是通过 .find() 获取元素，然后使用 .indexOf()。例如:

var member_data_list = [
  ["adrian", "test", Number(9)],
  ["supler", "test", Number(2.3)],
  ["franz", "test", Number(2.5)],
  ["drucker", "test", Number(9.6)],
];

if (exists(member_data_list, "franz")) {
    var found = member_data_list.find(row => row[0] === "franz")
    var index = member_data_list.indexOf(found)
    
    // if the element is exists then index's value will be greater than -1
    if (index > -1) {
      console.log("NAME IS IN ARRAY AT INDEX " + index)
    }
}
        
function exists(arr, search) {
   return arr.some(row => row.includes(search));
}