Hello, I am doing the Basic Algorithm : Confirm the Ending, and found that the below works (arr3 will be be joined without commas) :-
let arr3 = arr1.slice(diff,check1); arr3 = arr3.join('');
but not this (arr3 will still have commas) :-
let arr3 = arr1.slice(diff,check1); arr3.join('');
Is it possible to maybe point me to an article on the reason for this? Thank you.