Atom - ŒQ - Distinct Sieve

Characters: Œ , Q

Tags: miscellaneous , array

Arity: monadic

This atom is monadic, which means it takes one argument.

Functionality

Replace the first occurrence of each element with 1 and all subsequent ones with 0.

Details

Replicating (x) a list by the distinct sieve will uniquify the list. That is, xŒQ$ is equivalent to Q (Uniquify).