Double Numbers using Recursion in JS

double-numbers.js

/**
 * double-numbers.js
 *
 * Translates an Array of Numbers to Double that using Recursion and some ES6 tricks.
 * @some(techniques).included([expansion assignment, rest operator, spread operator, ternary operator, arrow functions])
 */
((numbers=[]) => {

  const doubleNumbers = ( collection = [], [ head, ...tail ] = collection ) => 
    (collection.length === 0) 
    ? [] 
    : [].concat([head * 2], doubleNumbers(tail))

  console.log(`Start with ${numbers.toString()}, and End with ${(doubleNumbers(numbers)).toString()}`);

})([2,4,6,8]);