symmetricDifference

Obtain values not present in both arrays.

Similar: union, intersection, difference, symmetricDifference.

function symmetricDifference(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];
var y = [3, 4, 5];
xarray.symmetricDifference(x, y);
// → [ 1, 2, 5 ]

var y = [-3, -4, -5];
xarray.symmetricDifference(x, y);
// → [
//    1,  2,  3, 4,
//   -3, -4, -5
// ]

xarray.symmetricDifference(x, y, (a, b) => Math.abs(a) - Math.abs(b));
// → [ 1, 2, -5 ]

xarray.symmetricDifference(x, y, null, v => Math.abs(v));
// → [ 1, 2, -5 ]

References

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