Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial
Tommy Gebru
30,164 PointsExplanation Javascript Object
Just a quick explanation please of why the quiz allows one answer to pass? I think this is a mistake... I copied + pasted the question below
Quiz Question 1 of 3
Which of these is NOT a valid way to access a property, "name", on an object?
//this was the question
Well done! That's right cat.key is accessing a property called "key".
A var key = "name"; cat[key];
B cat["name"];
C var key = "name"; cat.key; //this was the answer
D cat.name;
3 Answers
Shuangshuang Zhao
5,822 PointsIn the answer C, you gave a value to a var key, and that value was a string "name".
When you are accessing cat.key, it equals to cat."name", which doesn't match the syntax object.key; or object["key"];
So you can't access the property.
If you are using a var key="name" and want to access the property "name", you can only go for cat[key]; , which equals to cat["name"]; .
I was confused about it before because I didn't realize that when I use var key, I was use a string. Hope it helps.
Unsubscribed User
6,144 PointsThere are only 2 ways to access an object property :
- object.property
- object["property"]
Answer C = object."property", this is NOT a valid way to access a property.
Tommy Gebru
30,164 PointsTherefore C is wrong ? Am I right?
Seth Kroger
56,416 PointsC is the correct answer because it's only invalid way to access the "name" property of cat.
Tommy Gebru
30,164 PointsHow can we make C right?
onion knight
Courses Plus Student 217 PointsTommy, by making it into answer A because answer C calls an invalid variable name.
