user=> (disj #{1 2 3}) ; disjoin nothing #{1 2 3} user=> (disj #{1 2 3} 2) ; disjoin 2 #{1 3} user=> (disj #{1 2 3} 4) ; disjoin non-existent item #{1 2 3} user=> (disj #{1 2 3} 1 3) ; disjoin several items at once #{2}
user=> (disj #{1 2 3}) ; disjoin nothing #{1 2 3} user=> (disj #{1 2 3} 2) ; disjoin 2 #{1 3} user=> (disj #{1 2 3} 4) ; disjoin non-existent item #{1 2 3} user=> (disj #{1 2 3} 1 3) ; disjoin several items at once #{2}