Question

以下是我想要达到的目标：

*该函数应检查firstName是否为实际联系人的firstName，并且给定属性（prop）是该联系人的属性。

如果两者都为真，则返回＆＃34;值＆＃34;该财产。

如果firstName与任何联系人不对应，则返回＆＃34;没有此类联系人＆＃34;

如果道具不对应任何有效的属性，则返回＆＃34;没有这样的属性＆＃34; *

我的代码：

//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
  for (var i = 0; i<prop.length; i++){
if(contacts.hasOwnProperty(firstName)=== true && contacts.hasOwnProperty(prop)=== true){

  return firstName[i].prop;
}
  else if(firstName !==firstName[i].prop)  {
    return "No such contact";
  }
   else if(prop !== "prop"){
     return "No such property";
   }
  }
// Only change code above this line
}

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

Answer 1

您可以使用Array.prototype.find过滤掉firstName的联系人 - 请参阅下面的演示：

// 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) {
  var found = contacts.find(function(e){
    return e.firstName === firstName;
  });
  if(!found) {
    return "No such contact";
  } else {
    if(prop in found) {
      return found[prop];
    } else {
      return "No such property";
    }
  }
}

// Change these values to test your function
var result = lookUpProfile("Akira", "likes");
console.log(result);

Javascript配置文件查找功能

1 个答案: