JavaScript intermediate quiz Solved

Question

Fill in blanks to make the variable arr3 look like the following: [1, 2, 3, 4, 5, 6, 7, 8].

const arr1 = [1, 2, 3];

const arr2 = [5, 6, 7, 8];

let arr3 = [ …arr1, 4,...arr2];

Answer 1

Andra Venkata Ramana Rao
good to hear that. 😎

Just curious, if you typed out the same thing in the javascript tab of a web codebit, then console.log(arr3); would it work normally? Or would you get an error? Just to see if the problem is in the Sololearn code coach validator or in your keyboard output...

There was an issue with the Apple keyboard preference auto replacing dot-dot-dot with the ellipses character, but that was 2013, a long time ago, and was in the Mail.app. But maybe you have something similar enabled in your settings somewhere? I disable keyboard auto replace and auto correct by habit so I don't get nasty surprises like these. quotation marks is one other symbol that gets replaced with look-alike illegal characters.

https://discussions.apple.com/thread/5526395?sortBy=rank

https://sololearn.com/compiler-playground/WFUi8Gz2M0wq/?ref=app

Answer 2

Ipang I found the same thing like the '...' ( buggy ? )
But this code does work and display the correct unpacked array

const arr1 = [1, 2, 3];
const arr2 = [5, 6, 7, 8];

let arr3 = [...arr1, 4, ...arr2];

console.log(arr3); // Output: [1, 2, 3, 4, 5, 6, 7, 8]

Without the '...' before arr1
// Output [[1,2,3],4,5,6,7,8]

and Andra Venkata Ramana Rao I ran that both here and on the online-compiler with same results

Answer 3

Andra Venkata Ramana Rao
use three '.', don't use the '…' character. It is not the same thing as '...' (3 separate .) It might look similar but they are not the same thing. The quiz input can accept multiple characters.

Answer 4

Andra Venkata Ramana Rao last module what lesson?

Answer 5

Finally my quiz completed
I just copied three dots from exersise and pasted here. Then it accept
Thank you very much one and all who support regardig this isse
THANK YOU VERY MUCH ALL

Answer 6

I just copy/pasted your snippet to check. It seems you have something that appears on screen like the spread operator `...` but it is not.

That was written in the line where <arr3> was defined, next to <arr1>.

I removed that `...` before <arr1>, type three dots in there, and it works.

let arr3 = [...arr1, 4, ...arr2];

Don't forget to log <arr3> in the console in case it was part of the task requirement :-)

Answer 7

do not put space between them and also no space at the end

Answer 8

Andra Venkata Ramana Rao
is it this one?

https://www.sololearn.com/post/1773598/?ref=app

Answer 9

Andra Venkata Ramana Rao
if you ever get it to pass, please tell us what you did so it will help others in the future.

Answer 10

Apologize for such late a reply, things were a bit crowded today :D

Hope there'll be a clear explanation on this matter cause as Bob_Li said, it would do a big help to other learners who encounters this anomaly in the future :-)

Answer 11

Hi Andra,

It's good to hear you have got through, good job!

I'm not sure whether it was Apple device specifics, but a quick test of the code in programiz, as BroFar sir said, resulted in same issue.

The three dots next to <arr1> is considered bad syntax. In programiz's playground the three dots next to <arr1> and <arr2> was noticeably different in the code editor.

P.S. Can you please update the original post to add [SOLVED] in the title, as a notification for those who searches for similar casea, that thia case had been solved.

And to be more relevant, change the tags to 'Javascript-quiz'. Tags are searchable keywords and to use relevant tags means help the search engine does its work better :-)

Answer 12

Which online compiler?

What did you mean key? I had pointed out the part with syntax issue, and provided a workaround....

Answer 13

In sololearn quiz that bit shows wrong
I lost more than 15 hearts. How can i complete the quiz

Answer 14

Yes sir

Answer 15

If you look in the comments lots of people seem to have this issue.

Answer 16

It shows wrong

Answer 17

What is the right one

Answer 18

The same code in online compiler shows no error. But in quiz it shows wrong
Please check and show the key

Answer 19

Keyboard key. Full stop key i am using

Answer 20

https://www.programiz.com/javascript/online-compiler/