JavaScript 使用循环语句查找通讯录

我们有一个联系人列表，里面存储着不同联系人的数组对象。

函数 lookUpProfile 有两个预定义参数：firstName值和prop属性 。

该函数应检查firstName是实际联系人的firstName，给定的属性（prop）是该联系人的属性。

如果它们都存在，函数返回prop属性对应的值。

如果firstName 值不存在，返回 "No such contact"。

如果prop 属性不存在，返回 "No such property"。

以下是相关代码

//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;
for (i=0;i<contacts.length;i++) {
    if(contacts[i].firstName==firstName){
        if(contacts[i].hasOwnProperty(prop)){
            return contacts[i][prop];
        }else{
        return  "No such property";
        }
    }
} return "No such contact";
// Only change code above this line
}

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