Tell us what’s happening:
So, with the given code, I have used dot notation for if (contacts[i].firstName === name) { and this has worked just fine. It returns the firstName property and resolves accordingly.
However, I have also used dot notation for return contacts[i].prop; but this returns undefined.
I have tested this out, and return contacts[i][prop]; returns the correct property value.
Evidently, I don’t really understand the difference between the two notations very well. Could someone help out?
**Your code so far**
// Setup
const 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 (prop in contacts[i]) {
return contacts[i].prop;
} else {
return "No such property";
}
}
}
return "No such contact"
}
lookUpProfile("Akira", "likes");
**Your browser information:**
User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36
Challenge: Profile Lookup
Link to the challenge:
