@extra-iterable/symmetric-difference NPM

Gives values not present in both iterables. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

Similar: union, intersection, difference, symmetricDifference.
This is part of package extra-iterable.

iterable.symmetricDifference(x, y, [fc], [fm]);
// x:  an iterable
// y:  another iterable
// fc: compare function (a, b)
// fm: map function (v, i, x)

:stopwatch: Compare function => O(n²).

const iterable = require("extra-iterable");

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

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

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

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