javascript - (基础)获取数组中对象的顺序号 - Javascript ES6

Question

我有一个关于 Javascript ES6 的基本问题，希望你能帮忙!我想获取数组中对象的顺序号:

[
  { "pk": 23, "image": "http://localhost:8000/media/users/1/2_27.jpg"},
  { "pk": 11, "image": "http://localhost:8000/media/users/1/2_27.jpg"},
  { "pk": 67, "image": "http://localhost:8000/media/users/1/2_27.jpg"}
]

我的 params.id: 11，我想打印 order_object = 2

Answer 1

您正在寻找findIndex

var order_object = arr.findIndex( s => s.pk == 11 ) + 1;

演示

var arr  = [
  { "pk": 23, "image": "http://localhost:8000/media/users/1/2_27.jpg"},
  { "pk": 11, "image": "http://localhost:8000/media/users/1/2_27.jpg"},
  { "pk": 67, "image": "http://localhost:8000/media/users/1/2_27.jpg"}
];

var order_object = arr.findIndex( s => s.pk == 11 ) + 1;

console.log( order_object );