freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/profile-lookup.md

id, title, challengeType, videoUrl, forumTopicId

id	title	challengeType	videoUrl	forumTopicId
5688e62ea601b2482ff8422b	Profile Lookup	1	https://scrimba.com/c/cDqW2Cg	18259

Description

We have an array of objects representing different people in our contacts lists. A lookUpProfile function that takes name and a property (prop) as arguments has been pre-written for you. The function should check if name is an actual contact's firstName and the given property (prop) is a property of that contact. If both are true, then return the "value" of that property. If name does not correspond to any contacts then return "No such contact". If prop does not correspond to any valid properties of a contact found to match name then return "No such property".

Instructions

Tests

tests:
  - text: <code>lookUpProfile("Kristian", "lastName")</code> should return <code>"Vos"</code>
    testString: assert(lookUpProfile('Kristian','lastName') === "Vos");
  - text: <code>lookUpProfile("Sherlock", "likes")</code> should return <code>["Intriguing Cases", "Violin"]</code>
    testString: assert.deepEqual(lookUpProfile("Sherlock", "likes"), ["Intriguing Cases", "Violin"]);
  - text: <code>lookUpProfile("Harry", "likes")</code> should return an array
    testString: assert(typeof lookUpProfile("Harry", "likes") === "object");
  - text: <code>lookUpProfile("Bob", "number")</code> should return "No such contact"
    testString: assert(lookUpProfile("Bob", "number") === "No such contact");
  - text: <code>lookUpProfile("Bob", "potato")</code> should return "No such contact"
    testString: assert(lookUpProfile("Bob", "potato") === "No such contact");
  - text: <code>lookUpProfile("Akira", "address")</code> should return "No such property"
    testString: assert(lookUpProfile("Akira", "address") === "No such property");

Challenge Seed

// 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
}

lookUpProfile("Akira", "likes");

Solution

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"]
    },
];


//Write your function in between these comments
function lookUpProfile(name, prop){
    for(var i in contacts){
      if(contacts[i].firstName === name) {
        return contacts[i][prop] || "No such property";
      }
    }
   return "No such contact";
}
//Write your function in between these comments

lookUpProfile("Akira", "likes");