怎么查找id=3在JSON中的索引位置

Question

[
  {id:"1",name:"张三"},
  {id:"2",name:"李四"},
  {id:"3",name:"王五"},
  {id:"4",name:"宋江"}
]

怎么查找id=3在JSON中的索引位置。比如我想查id=3,应该返回2

Answer 1

<script>
var arr=[
  {id:"1",name:"张三"},
  {id:"2",name:"李四"},
  {id:"3",name:"王五"},
  {id:"4",name:"宋江"}
];
let findId=id->arr.findIndex(o->o.id==id);
console.log(findId(3));
</script>