JavaScript intermediate quiz

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

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 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

It shows wrong

Answer 4

What is the right one

Answer 5

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

Answer 6

Which online compiler?

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

Answer 7

Keyboard key. Full stop key i am using

Answer 8

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

Answer 9

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