<section id="description">
 У нас есть набор объектов, представляющих собой список контактов. Напишите функцию <code>lookUpProfile</code>
 которая принимает аргументы <code>name</code> и <code>prop</code>.

 <ol>
 <li>Функция должна проверять, соответствует ли <code>name</code> свойству <code>firstName</code> данного контакта и
 данное
 свойство
 <code>prop</code> является свойством этого объекта контакта.
 </li>
 <li>Если оба эти условия истинны, верните значение этого свойства.</li>
 <li>Если
 <code>name</code> не соответствует контактам, тогда верните <code>No such contact</code>
 </li>
 <li>Если <code>prop</code> не
 соответствует каким-либо действительным свойствам объекта контакта, найденного для соответствия <code>name</code>
 тогда
 верните <code>No such property</code></li>
 </ol>

 

 
 Подсказка: Вам будет полезно вспомнить метод <a
 href="https://freecode.academy/learn/exercises/567af2437cbaa8c51670a16c"
 target="_blank">Object.prototype.hasOwnProperty()</a>
 
 
 Подсказка 2: Вам так же может пригодиться метод <a
 href="https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Global_Objects/Array/find"
 target="_blank">Array.prototype.find()</a> для поиска элементов массива по условию.
 
</section>

//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(name, prop){
// Only change code below this line

// Only change code above this line
}

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


index

Поиск профиля

Profile Lookup

<code>"Kristian", "lastName"</code> should return <code>"Vos"</code>

<code>"Sherlock", "likes"</code> should return <code>["Intriguing Cases", "Violin"]</code>

<code>"Harry","likes"</code> should return an array

<code>"Bob", "number"</code> should return "No such contact"

<code>"Bob", "potato"</code> should return "No such contact"

<code>"Akira", "address"</code> should return "No such property"

javascript-algorithms-and-data-structures

Basic JavaScript

//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(name, prop){
// Only change code below this line

const fnMatch = contacts.filter(cont => cont.firstName === name);
  return fnMatch.length ? (fnMatch[0][prop] ? fnMatch[0][prop] : "No such property") : "No such contact";

// Only change code above this line
}

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


//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(name, prop) {
// Only change code below this line

for (let x = 0; x < contacts.length; x++) {
 if (contacts[x].firstName === name) {
 if (contacts[x].hasOwnProperty(prop)) {
 return contacts[x][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");

//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(name, prop){
// Only change code below this line
for(var i=0; i<contacts.length; i++){
if(contacts[i].firstName=== name){
 if(contacts[i].hasOwnProperty(prop)){
 return contacts[i][prop];
 }else {return "No such property"};
}
// Only change code above this line
}return "No such contact";
}
// Change these values to test your function
lookUpProfile("Akira", "likes");

//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(name, prop){
// Only change code below this line
 for (let i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name) {
 if (prop in contacts[i]) {
 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");

//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(name, prop){
// Only change code below this line
for(let 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'
// Only change code above this line
}

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

//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(name, prop){
// Only change code below this line

 for (let x = 0; x < contacts.length; x++) {
 if (contacts[x].firstName === name) {
 if (contacts[x].hasOwnProperty(prop)) {
 return contacts[x][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");

//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(name, prop){
// Only change code below this line

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

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

//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(name, prop){
// Only change code below this line
for (var i = 0; i < contacts.length; i++ ) {
 if (contacts[i].firstName === name) {
 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");

//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(name, prop){
// Only change code below this line
for(let 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'
// Only change code above this line
}

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

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

//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(name, prop){
// Only change code below this line
for (var i=0; i < contacts.length; i++){
 console.log(i);
 if (contacts[i]['firstName'] === name){
 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

//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(name, prop){
// Only change code below this line
    for (let contact of contacts){
        if (contact.firstName == name) {
            if ( contact.hasOwnProperty(prop)) {
                return contact[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");


//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(name, prop){
// Only change code below this line
 for (var i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name) {
 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");

//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(name, prop){
// Only change code below this line

 for (var i=0; i < contacts.length; ++i){

 if (contacts[i].firstName === name || contacts[i].lastName === name) {

 if (!contacts[i].hasOwnProperty(prop)) {
 return "No such property";
 }

 return contacts[i][prop];
 }
 }

 return "No such contact";
 
 
// Only change code above this line
}

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

//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(name, prop) {
 // Only change code below this line

 for (var i = 0; i < contacts.length; ++i) {

 if (contacts[i].firstName === name || contacts[i].lastName === name) {

 if (!contacts[i].hasOwnProperty(prop)) {
 return "No such property";
 }

 return contacts[i][prop];
 }
 }

 return "No such contact";


 // Only change code above this line
}

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

//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(name, prop){
// Only change code below this line
    // console.log(name, prop)
    if(contacts[0].hasOwnProperty(prop)) {
        let contact = contacts.find(function(item) {            
            return item.firstName == name;
        })
        // console.log(prop, name, contact)
        return contact != undefined ? contact[prop] : 'No such contact'
    } else {
        if (name == 'Bob') return "No such contact"
        return "No such property"
    }
// Only change code above this line
}

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


//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(name, prop){
// Only change code below this line
 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";
// Only change code above this line
}

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

//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(name, prop){
// Only change code below this line
 for (var i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name) {
 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");

//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(name, prop) {
    // Only change code below this line
    for(let el of contacts) {
        if (el.firstName == name && el.hasOwnProperty(prop)){
            return el[prop];
        } else if (el.firstName == name && el.hasOwnProperty(prop) === false) {
            return "No such property";
        }
    }
    return 'No such contact';

    // Only change code above this line
}

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


//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(name, prop){
// Only change code below this line
for (var i=0; i<contacts.length; ++i) {
 if (contacts[i].firstName === name) {
 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");

//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(name, prop) {
    // Only change code below this line
    const contact = contacts.find((n) => n.firstName === name);

    if (!contact) {
        return "No such contact";
    } else if (!contact.hasOwnProperty(prop)) {
        return "No such property";
    }

    // else
    return contact[prop];
    //console.log(contact[prop]);

    // Only change code above this line
}

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

//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(name, prop) {
// Only change code below this line
 for (var i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName == name) {
 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");

//Setup
let 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){
// Only change code below this line
 for (let i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name && contacts[i].hasOwnProperty(prop)) {
 return contacts[i][prop];
 } else if (contacts[i].firstName === name) {
 return "No such property";
 }
 }
 return "No such contact"
 }
// Only change code above this line
// Change these values to test your function
lookUpProfile("Akira", "likes");

//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(name, prop){
// Only change code below this line
 for (let i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name) {
 if (contacts[i].hasOwnProperty(prop) === true) {
 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");

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

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

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

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

//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(name, prop){
// Only change code below this line
 for (let i = 0; i < contacts.length; i++) {
 if (contacts[i]['firstName'] == name && contacts[i].hasOwnProperty(prop)) {
 return contacts[i][prop];
 } else if (contacts[i]['firstName'] == name && contacts[i].hasOwnProperty(prop) == false) {
 return 'No such property';
 };

 };
 return 'No such contact';
// Only change code above this line
}

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

//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(name, prop) {
    // Only change code below this line

    var contact = contacts.find(item => item.firstName == name);

    if(contact){
        if(contact[prop]){
            return contact[prop];
        } else{
            return 'No such property';
        }
    } else {
        return "No such contact";
    }
    // Only change code above this line
}

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


//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(name, prop){
// Only change code below this line
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";

 
 
 
 
 
// Only change code above this line
}

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

//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(name, prop) {
 for (let x = 0; x < contacts.length; x++) {
 if (contacts[x].firstName === name) {
 if (contacts[x].hasOwnProperty(prop)) {
 return contacts[x][prop];
 } else {
 return "No such property";
 }
 }
 }
 return "No such contact";
}

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

//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(name, prop){
for (let i = 0; i < contacts.length; i++){
 if (contacts[i].firstName === name){
 return contacts[i][prop] || "No such property";
 }
}
return "No such contact"
}

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

//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(name, prop){
// Only change code below this line
 
 
 for (let i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name){
 if(contacts[i][prop]) {
 return contacts[i][prop];
 }
 return 'No such property';
 } 

 
 } 
 return 'No such contact';








// Only change code above this line
}

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

//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(name, prop){
// Only change code below this line
for (let i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name) {
 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");

//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(name, prop){
// Only change code below this line
for(let i=0;i<contacts.length;i++){
 if(contacts[i].firstName===name){
 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");

//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(name, prop) {
 for (let x = 0; x < contacts.length; x++) {
 if (contacts[x].firstName === name) {
 if (contacts[x].hasOwnProperty(prop)) {
 return contacts[x][prop];
 } else {
 return "No such property";
 }
 }
 }
 return "No such contact";
 }


// function lookUpProfile(name, prop) {
// for (let x = 0; x < contacts.length; x++) {
// if (contacts[x].firstName === name) {
// if (contacts[x].hasOwnProperty(prop)) {
// return contacts[x][prop];
// } else {
// return "No such property";
// }
// }
// }
// return "No such contact";
// }
lookUpProfile("Akira", "likes");

//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(name, prop) {
 let result;
 var flag = false;
 for (let i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name) {
 flag = true;
 if (!contacts[i].hasOwnProperty(prop)) {
 return "No such property"
 } else {
 return contacts[i][prop];
 }
 }
 
 }
 if (!flag) {
 return "No such contact"
 }

 // Only change code above this line
}

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

//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(name, prop) {
 for (let i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name) {
 if (contacts[i][prop]) {
 return contacts[i][prop];
 }
 return "No such property";
 }
 }
 return "No such contact";
} */

function lookUpProfile(name, prop) {
 // Only change code below this line
 function test(n) {
 return n.firstName === name;
 }
 const item = contacts.find(test);
 console.log(item);

 if (item) {
 if (item[prop] === undefined) {
 return 'No such property';
 }

 return item[prop];
 }
 else {
 return 'No such contact';
 }
 // Only change code above this line
}



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

//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(name, prop){
// Only change code below this line
for ( let i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name) {
 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");

//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(name, prop) {
 // Only change code below this line
 for (let 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"
// Only change code above this line
}

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

//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(name, prop){
// Only change code below this line
 for(let i = 0; i< contacts.length;i++){
 if (contacts[i].firstName == name){
 if (contacts[i][prop]) {
 return contacts[i][prop]
 }
 return 'No such property'
 } 
 
 }
 return 'No such contact'
 }
// Only change code above this line


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

//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(name, prop){
// Only change code below this line
    let r = {};
    contacts.find((e, i) => {
        if (e.firstName == name) {
            r.name = e.firstName;
            if (e.hasOwnProperty(prop)) {
                r.prop = e[prop];
            } else if (i == contacts.length - 1 && !r.prop) {
                r.prop = null;
            }
        } else if (i == contacts.length - 1 && !r.name) {
            r.name = null;
        }
    });
    if (r.name == null) return 'No such contact';
    if (r.prop == null) return 'No such property';
    return r.prop;
// Only change code above this line
}

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


//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(name, prop){
// Only change code below this line 
//console.log(contacts[0].firstName)
let flag = false;
for (let i in contacts){
    if (contacts[i].firstName === name) {
        if (contacts[i].hasOwnProperty(prop)){
            return contacts[i][prop];
        } else {
            return "No such property";
        }
        flag=true;
    }
    
    //console.log(contacts[i].firstName);
}

if (!flag) { 
    return "No such contact";
    }


// Only change code above this line
}

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


//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(name, prop){
// Only change code below this line
 for (let i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName === name) {
 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");

//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(name, prop) {
 // Переглянути всі контакти
 for (var i = 0; i < contacts.length; i++) {
 // Якщо знайдено контакт з ім'ям `name`
 if (contacts[i].firstName === name) {
 // Перевірити, чи в контакті є властивість `prop`
 if (contacts[i].hasOwnProperty(prop)) {
 // Якщо так, повернути значення властивості `prop` для цього контакту
 return contacts[i][prop];
 } else {
 // Якщо такої властивості немає, повернути 'No such property'
 return 'No such property';
 }
 }
 }
 // Якщо не знайдено контакт з ім'ям `name`, повернути 'No such contact'
 return 'No such contact';
}

// Змініть ці значення, щоб перевірити вашу функцію
lookUpProfile("Akira", "likes");

// Якщо не знайдено контакт з ім'ям `name`, повернути 'No such contact'
// Only change code above this line

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

//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(name, prop) {
 // Only change code below this line

 for (let 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"


 // Only change code above this line
}


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

//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(name, prop) {
 // Only change code below this line
 var property = 0;
 var haveContact = 0;
 for (var i = 0; i < contacts.length; i++) {
 if (name === contacts[i].firstName) {
 haveContact = 1
 if (contacts[i].hasOwnProperty(prop) == true) {
 property = contacts[i][prop];
 }
 }
 }
 if (haveContact != 0) {
 if (property != 0) { return property }
 else { return "No such property" }
 }
 else {return "No such contact"}

 // Only change code above this line
}

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

RichText

Очень интересный урок, который хотелось бы обсудить... К своему удивлению, я не нашел здесь во всех уроках по Javascript уроков, касающихся методов типа Array.find(), Array.filter(), Array.findIndex() и т.п. При этом это очень полезные методы, используемые чуть ли не каждый день. И на мой взгляд они, во-первых, более короткие, чем конструкции типа for(...), а во-вторых, более логичны в плане восприятия.

Сразу отмечу, что я не хочу сказать, что другие решают не правильно. Я просто хочу показать другие варианты.

Сравним код большинства ответов в этой задаче:

и одно из моих решений:

Какое решение вам кажется более наглядным? 

Как мне кажется, вариант с перечислением for (let i = 0; i < contacts.length; i++) более громоздкий и в нем больше отвлекающих переменных. То есть мы создаем переменную-счетчик i, сравниваем ее со значением длины массива, каждую итерацию увеличиваем ее значение, используем для получения элемента массива и т.п., и все это вместо того, чтобы работать просто с массивом и его элементами.

В моем варианте используется метод массива find(condition). Уточню, что прототипом всех массивов является Array. Соответственно, все методы его наследуются и конечным массивам. Метод find(condition) принимает в качестве параметра функцию, используемую для поиска элемента в текущем массиве (первого, удовлетворяющего условию). То есть массив перечисляет все свои элементы до тех пор, пока применяемая к ним функция не вернет истину (или то, что может быть преобразовано в логическое true). В моем случае это n => n.firstName === name.

Для кого-то данная конструкция может быть не понятна, уточню: это стрелочная функция. Если переводить на более понятный синтаксис, то это так:

Подробней о стрелочных функциях в этом уроке.

Итак, применив метод Array.find() вместо перечисления for(...) я попытался найти нужный мне элемент.

const item = contacts.find(n => n.firstName === name);

В данном случае (если понять синтаксис) все сильно понятней и логичней: я выполнил метод поиска у самого массива и получил найденный элемент из него и присвоил в переменную item (или присвоил undefined, если элемент не был найден).

Далее я уже работаю с проверками на самом элементе 

То есть вроде тоже все понятно: если элемент item есть, то в нем проверяю значение, если нет, то возвращаю сообщение об ошибке. И никаких лишних i и т.п. 

В погоне за сокращением можно и вовсе вот так написать: 

То есть я сразу проверил есть ли объект и если нет, возвращяю 'No such contact', иначе возвращаю свойство объекта (если оно есть) или сообщение 'No such property'

Да, такой стиль может показаться более сложным и запутанным, но сейчас чаще именно так и пишут, потому что меньше кода - меньше над чем думать приходится.

Обсуждение задания "Profile Lookup"

Согласен на счет метода. Здесь описание по лучше: https://doka.guide/js/array-find/

Николай, сейчас более детально буду изучать предложенный тобой метод, но хотел бы уточнить пока по своему варианту решения - почему я получаю "Unspecified AssertionError"  в первой и третьей проверке, не могу увидеть свою ошибку

Спасибо за ответ. Довольно сложновато это пока воспринимается. Очень мало-по малу мозг проходит перепрошивку.)))

Совершенно не факт. Нужно тестирование проводить. Хотя вряд ли разница будет ощутимая. Но есть разница в восприятии и объеме кодовой базы. 

Николай, огромное спасибо за супер подробный ответ

Денис, у тебя здесь главная ошибка в том, что ты при первом же несовпадении контакта возвращаешь 'No such contact'. То есть по сути у тебя логика будет работать только для первого в массиве контакта и только если свойство есть. Но у тебя же и другие контакты проверяются. А как до них дойдет логика? В данном случае никак. То есть тебе надо перечислить все контакты и только если перебрал все и не нашел ни одного по имени, тогда только возвращать ошибку, то есть вынести это условие за пределы цикла. Если в цикле отработает целевое условие и ты выполнишь return - тогда и не дойдет дело до возврата ошибки. А если в цикле ничто не выполнится, тогда уже вернешь ошибку.

Второй момент: ты сразу первым делом проверяешь двойное условие

Не надо так. Первое главное условие у тебя: это найден контакт или нет. Если найден, тогда по нему уже все и проверяй далее. Если нет - то пропусти его. То есть оберни все в условие

Третий момент: старайся не использовать нестрогое сравнение ==, старайся всегда строгое ===. Иначе не редко будешь ловить логические ошибки. 

Просто не останавливайтесь и учитесь дальше. Практика решает.

Если правильно понимаю - и по времени быстрее должно работать?

Уроки

> В этом коде почему-то работает только return "No such contact" и return "No such property".

Посмотрите внимательно чужие решения. Они сводятся к тому, чтобы сначала найти контакт по имени в цикле, и только если найден контакт, тогда уже смотреть в нем свойства. А за пределами цикла, если не найден контакт, тогда уже только возвращать конечное решение "Контакт не найден". Вы же делаете иначе - вы сразу смотрите тот это контакт или нет, и если не тот, то возвращаете ошибку. В итоге ваша логика может сработать только если первый контакт в массиве соответствует запрошенному и свойство запрошено корректно. В противном случае вы возвращаете ошибку и далее перебор в цикле уже не выполняется.

По второй части вопроса: советую уже сейчас вам начинать изучать TypeScript, вы тогда начнете быть более внимательным к типам. В целом вы идею правильно поняли с поиском по внутренним массивам, но нельзя сравнивать строку с массивом. Для примера ваше: item.likes == name.

item.likes здесь - массив, например ["Pizza", "Coding", "Brownie Points"], и вы его пытаетесь сравнить со строчным name. Нельзя так. Почти всегда будет ложь, ито, только потому что вы используете нестрогое сравнение ==. Если бы использовали строгое ===, то 100% было бы всегда ложь, потому что типы не совпадают. 

В вашем случае, если бы вы хотели найти по элементу во вложенном массиве, то надо еще внутри искать по массиву, а не просто через сравнение. Пример. 

var contact = contacts.find(item => item.likes.includes(name));

Только здесь надо понимать, что name здесь - не имя контакта, а именно элемент массива likes, то есть "Pizza", "Coding" или "Brownie Points".

Описание метода Array.includes смотрите здесь https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes

Почему такой код не работает? Логика - сначало проверить на отсутствие свойства с именем атрибута name. Если иначе - выполняется else if (изначально я вообще хотел там написать просто contacts[i].hasOwnProperty(prop) без && и проверки на наличие свайства с именем атрибута name). В этом коде почему-то работает только return "No such contact" и return "No such property".

function lookUpProfile(name, prop) {
 for (let i = 0; i < contacts.length; i++) {
 if (contacts[i].firstName != name) {
 return "No such contact";
        } else if (contacts[i].firstName == name && contacts[i].hasOwnProperty(prop)) {
 return contacts[i][prop];
        }
 else return "No such property";
        }
    }

И еще хотел спросить: Так что в итоге находиться тут в переменной item:  const item = contacts.find(n => n.firstName === name)?  И что подставляется в переменную n? В n - gоочередно каждый объект массива contacts (которых по сути 4)? А item - становится найденным объектом (то есть при name "Akira" как я понял - это будет первый объект нашей базы данных, которая в массиве)? И уже там, внутри первого объекта, который занял переменную item мы начинаем искать prop далее через if'ы? И если это так, то как сделать аналогичную вещь, которая бы искала значение во внутренних массивах? Например если бы name было массивом, то как сделать такой find? const item = contacts.find(n => n.likes === name) - Так что ли? 

Вот что я имею ввиду. Но почему-то это не работает.

let x = ["Pizza", "Coding", "Brownie Points"];

function lookUpProfile(name) {
 var contact = contacts.find(item => item.likes == name);
 if (contact) {
 return contact;
    }
 return "Dont work";
}
console.log(lookUpProfile(x));

let x = "Akira";

function lookUpProfile(name) {
 var contact = contacts.find(item => item.firstName == name);
 if (contact) {
 return contact;
    }
 return "Dont work";
}
console.log(lookUpProfile(x));

