concat$

Combines entries from objects, preferring last.

Alternatives: concat, concat$.
Similar: concat, join.

function concat$(x, ...ys)
// x:  an object (updated)
// ys: other objects

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

var x = {a: 1, b: 2};
var y = {c: 3, d: 4};
object.concat$(x, y);
// → { a: 1, b: 2, c: 3, d: 4 }

x;
// → { a: 1, b: 2, c: 3, d: 4 }

var x = {a: 1, b: 2};
var z = {d: 40, e: 50};
object.concat$(x, y, z);
// → { a: 1, b: 2, c: 3, d: 40, e: 50 }

References

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