difference$

Obtain values not present in another set.

Alternatives: difference, difference$.
Similar: union, intersection, difference, symmetricDifference, isDisjoint.

function difference$(x, y)
// x: a set (updated)
// y: another set

const set = require('extra-set');

var x = new Set([1, 2, 3, 4, 5]);
var y = new Set([2, 4]);
set.difference$(x, y);
// → Set(3) { 1, 3, 5 }

x;
// → Set(3) { 1, 3, 5 }

var x = new Set([1, 2, 3, 4, 5]);
var y = new Set([2, -4]);
set.difference$(x, y);
// → Set(4) { 1, 3, 4, 5 }

References

• Data.List.\: Haskell
• Data.Set.difference: Haskell
• Set.difference: Python
• _.difference: lodash
• _.differenceBy: lodash
• _.differenceWith: lodash
• Array.remove: sugarjs