获取记录信息的循环javascript

Question

我似乎无法从多维数组中获取我需要的记录。并没有给我任何特别的错误，可以让我明确指出我做错了什么。

你能帮忙吗？

//Setup
var contacts = [
    {
        "firstName": "Akira",
        "lastName": "Laine",
        "number": "0543236543",
        "likes": ["Pizza", "Coding", "Brownie Points"]
    },
    {
        "firstName": "Harry",
        "lastName": "Potter",
        "number": "0994372684",
        "likes": ["Hogwarts", "Magic", "Hagrid"]
    },
    {
        "firstName": "Sherlock",
        "lastName": "Holmes",
        "number": "0487345643",
        "likes": ["Intriguing Cases", "Violin"]
    },
    {
        "firstName": "Kristian",
        "lastName": "Vos",
        "number": "unknown",
        "likes": ["Javascript", "Gaming", "Foxes"]
    }
];


function lookUpProfile(firstName, prop){
// Only change code below this line
  var i = 0;
  while(i < contacts.length) {
    if (contacts[i].firstName === firstName) {
      return contacts[i].prop;
    }
  i++;
}
// Only change code above this line
}

// Change these values to test your function
lookUpProfile("Akira", "likes");

Answer 1

更改

return contacts[i].prop;

到

return contacts[i][prop];

要扩展一下：在原始代码中，您要求获得名为＆＃34; prop＆＃34;的字段。来自联系。您的意图是希望字段具有变量prop的值。

Answer 2

将contacts[i].prop;更改为contacts[i][prop];