symmetricDifference$

Obtain entries not present in both maps.

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

function symmetricDifference$(x, y)
// x: a map (updated)
// y: another map

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

var x = new Map([['a', 1],  ['b', 2],  ['c', 3],  ['d', 4]]);
var y = new Map([['c', 30], ['d', 40], ['e', 50], ['f', 60]]);
map.symmetricDifference$(x, y);
// → Map(4) { 'a' => 1, 'b' => 2, 'e' => 50, 'f' => 60 }

x;
// → Map(4) { 'a' => 1, 'b' => 2, 'e' => 50, 'f' => 60 }

var x = new Map([['a', 1],  ['b', 2],  ['c', 3], ['d', 4]]);
var y = new Map([['d', 40], ['e', 50], ['f', 60]]);
map.symmetricDifference$(x, y);
// → Map(5) { 'a' => 1, 'b' => 2, 'c' => 3, 'e' => 50, 'f' => 60 }

References

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