DEV Community


Discussion on: And then the interviewer asks, "Can you do this with less code?"

elmuerte profile image
Michiel Hendriks

If you are going to assume a is an array, then you could even use !=.

michaelsolati profile image
Michael Solati Author

Haha, I thought so too. And I guess we could use let instead of const since it's one letter less.

Thread Thread
jonrandy profile image
Jon Randy
const duplicateCheck = a => a.length - new Set(a).size;

Shorter and more useful since it returns the number of duplicates

Thread Thread
elmuerte profile image
Michiel Hendriks • Edited
const duplicateCount = a => a.length - new Set(a).size;

And now with a meaningful name. Because, what does duplicateCheck mean, that is has, or does not have duplicates. For the boolean version hasDuplicates would be the better name.

Forem Open with the Forem app