allUnique - check for uniqueness in an array

[Alhassan Atama]

Returns True if all the values in an array are unique, and vice versa

Using Set() object to store unique values to remove duplicates

[Rishab Pandey]

hey @komputarist Can you please assign it to me ???I would love to work on it.

[Alhassan Atama]

Oops! So sorry @Rishabrp99, I already created a PR for it 😔