difference

Obtain values not present in another iterable.

Similar: union, intersection, difference, symmetricDifference.

function difference(x, y, fc, fm)
// x:  an iterable
// y:  another iterable
// fc: compare function (a, b)
// fm: map function (v, i, x)

References

• Data.List.\: Haskell
• Data.Set.difference: Haskell
• Set.difference: Python