javascript - 保存 JSON 对象键时数组长度和数组元素不正确

Question

我有一个带有 JSON 对象响应数组的 API，如下所示

[
   {
     person_id:"12212",
     person_name:"some name",
     deptt : "dept-1"
   },
   { 
     person_id: "12211",
     person_name: "some name 2"
     deptt : "dept-2"
    },

]

我试图将 person_id 的值保存在数组中，但这些值未正确保存，因此数组长度不正确。

由于我正在使用 Chakram，这就是我目前正在做的事情

it('gets person id in array',()=>{
  let array_ids =[];
  let count=0;
    return response.then((api_response)=>{
     for(var i=1;i<api_response.body.length;i++){
       //this is correctly printing the person id of response
       console.log('Person ids are ==>'+api_response.body[i].person_id);
       count++;

       //this is not working
       array_ids = api_response.body[i].person_id;
}
      console.log('Count is '+count) //prints correct number
      console.log('Array length '+array_ids.length) //prints incorrect length - sometimes 11, sometimes 12
});
});

我想知道为什么会出现这种情况？是

array_ids = api_response.body[i].person_id 

获取/分配数组中元素的错误方法？

Answer 1

试试这个，您的代码中有一个更正。您不是将 ID 插入数组，而是每次都分配新的 ID 值。

it('gets person id in array',()=>{
  let array_ids =[];
  let count=0;
    return response.then((api_response)=>{
     for(var i=1;i<api_response.body.length;i++){
       //this is correctly printing the person id of response
       console.log('Person ids are ==>'+api_response.body[i].person_id);
       count++;

       //this is not working
       array_ids.push(api_response.body[i].person_id); //update
}
      console.log('Count is '+count) //prints correct number
      console.log('Array length '+array_ids.length) //prints incorrect length - sometimes 11, sometimes 12
});
});