concat

Appends values from arrays. 🏃 📼 📦 🌔 📒

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

array.concat(...xs);
// xs: arrays

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

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

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

References

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