@extra-array/unshift-update

Adds values to the start. 📦 😺 🏃 📼 🌔 📜 📰 📘

Alternatives: unshift, unshift$.
Similar: push, pop, shift, unshift.

This is part of package extra-array.

array.unshift$(x, ...vs);
// x:  an array (updated)
// vs: values to add
// → x

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

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

x;
// [ 2, 3, 4 ]

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

References

• Array.prototype.unshift: MDN web docs
• array_unshift: PHP
• Array.unshift: Ruby
• immutable-iterable-prototype: @azu