isDisjoint

Check if maps have no common keys.

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

function isDisjoint(x, y)
// x: a map
// y: another map

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

var x = new Map([['a', 1], ['b', 2], ['c', 3]]);
var y = new Map([['c', 3], ['d', 4]]);
map.isDisjoint(x, y);
// → false

var y = new Map([['d', 4]]);
map.isDisjoint(x, y);
// → true

References

• Data.Set.disjoint: Haskell
• Set.isdisjoint: Python