concat$

Appends arrays to the end. 🏃 📼 📦 🌔 📒

Alternatives: default, update.

array.concat$(x, ...ys);
// x:  an array (updated)
// ys: arrays to append
// --> x

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

var x = [1, 2];
var y = [3, 4];
array.concat$(x, y);
// [ 1, 2, 3, 4 ]

x;
// [ 1, 2, 3, 4 ]

var x = [1, 2];
array.concat$(x, y, y);
// [ 1, 2, 3, 4, 3, 4 ]

references

• Array.prototype.concat: MDN web docs