How to avoid coincidences when generating random numbers?

Question

JavaScript

Good afternoon,
The story is as old as the world...
I'm learning JavaScript and ran into a problem while implementing a training project.
Please help me to avoid repeating the answers that are randomly generated.

Code:
https://github.com/oleksiykalashnyk/taskForJS-game...

Demo:
https://oleksiykalashnyk.github.io/taskForJS-gameF...

I would be very grateful.
Thank you
all world

Answer 1

Generate a result set into an array, and then take a random element from it and remove it from the array.