Some questions with Profile Lookup challenge

Tell us what’s happening:
I already read the solution for this. My questions are with the for loop:

For loop variables are always used to reference the index of the variable?

What is exactly doing the for loop in this code?

Your code so far


// 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){
return contacts[i][prop] || "No such property";
 } 
}
return "No such contact";
}

lookUpProfile("Akira", "likes");

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Challenge: Profile Lookup

Link to the challenge:

contacts is an array. The for loop allows you to look at each of the contact items in order.

2 Likes

Hello~!

contacts is an array of objects. The for loop is iterating through the contacts array. :slight_smile:

1 Like

So everytime I want to “look up” the contents of my object in order I should use a for loop?

You don’t necessarily need to use a for loop. There are some built-in methods that will allow you to complete this challenge. :slight_smile:

1 Like