concat

Combines values from sets.

Alternatives: [concat], [concat$].

set.concat(...xs);
// xs: sets

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

var x = new Map([['a', 1], ['b', 2]]);
var y = new Map([['c', 3], ['d', 4]]);
map.concat(x, y);
// Map(4) { 'a' => 1, 'b' => 2, 'c' => 3, 'd' => 4 }

var z = new Map([['d', 40], ['e', 50]]);
map.concat(x, y, z);
// Map(5) { 'a' => 1, 'b' => 2, 'c' => 3, 'd' => 40, 'e' => 50 }

references

• Array.prototype.concat: MDN web docs
• Array.add: sugarjs