/*

Description:

Be Concise II – I Need Squares

You are given a program squaresOnly that accepts an array of natural numbers up to and including

100

(and including 0) of length >= 1, array, and returns a new array containing only square numbers that have appeared in the input array.

Refactor the solution to use as few characters as possible. There is a maximum character limit of 127. Here are a few hints:

There are a lot of handy built-in Array methods in Javascript that you may have never heard of even after completing a basic course in Javascript (e.g. those provided by Codecademy) – well, at least I haven’t heard of until quite recently. You may also want to research any new built-in methods offered by ES6, the newest specification of Javascript at the time of writing.

Don’t you think the array parameter is a bit wordy? 😉

Good luck! 😀

*/

function squaresOnly(array) {

return array.filter(num=>Number.isInteger(Math.sqrt(num)))}