多维数组-用于获取记录信息的javascript while循环

Question

我似乎无法从多维数组中获取所需的记录。它并没有给我任何特定的错误，让我准确地指出我做错了什么。

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;

至

return contacts[i][prop];

扩展一下：在您的原始代码中，您要求从联系人获取名为"prop"的字段。您的意图是想要具有变量prop的值的名称的字段。

Answer 2

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