isDisjoint

Examine if arrays have no value in common.

Similar: isUnique, isDisjoint, intersection.

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

⏱️ Compare function ⇒ O(n²).

const xarray = require('extra-array');

var x = [1, 2, 3, 4];
xarray.isDisjoint(x, [2, 5]);
// → false

xarray.isDisjoint(x, [-2, -5]);
// → true

xarray.isDisjoint(x, [-2, -5], (a, b) => Math.abs(a) - Math.abs(b));
// → false

xarray.isDisjoint(x, [-2, -5], null, v => Math.abs(v));
// → false

References

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