js基础练习：实现资料查找

我们有一个对象数组，里面存储着通讯录。

函数lookUp有两个预定义参数：firstName值和prop属性 。

函数将会检查通讯录中是否存在一个与传入的firstName相同的联系人。如果存在，那么还需要检查对应的联系人中是否存在prop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"。

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(name, prop) {
  for (var i = 0; i < contacts.length; i++) {
    if (name == contacts[i]["firstName"]) {
      if (contacts[i].hasOwnProperty(prop)) {
        return contacts[i][prop];
      }else{
        return "No such property";
      }
    }
  }
  return "No such contact";
}
lookUpProfile("Akira", "likes");//["Pizza", "Coding", "Brownie Points"]

 

转载于:https://www.cnblogs.com/glmkeep/p/11078448.html