A simple Array.prototype extension
npm install b-arrayjs
require('b-array');
const a = [1,2,3,4];
console.log(a.first()); // log: 1
console.log(a.last()); // log: 4
console.log(a.contains(10)); // log: false
console.log(a.is_empty()); // log: false
a.for_each(el => console.log(el)); // logs: 1234
``