reorder t/bag.t more logically
compare? (equal, disjoint, et cetera)
symmetric difference?
allow negative 'number of instances'?
allow fractional 'number of instances'?
plus minus infinite 'number of instances'?
publicize _merge?
reorder t/bag.t more logically
compare? (equal, disjoint, et cetera)
symmetric difference?
allow negative 'number of instances'?
allow fractional 'number of instances'?
plus minus infinite 'number of instances'?
publicize _merge?