Does it mutate 😱
Array.prototype.filter
No mutation
Description
The filter() method creates a new array with all elements that pass the test implemented by the provided function.
Array.prototype.filter ( callbackfn [ , thisArg ] )
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter
Example
var words = ['spray', 'limit', 'elite', 'exuberant', 'destruction', 'present'];
const result = words.filter(word => word.length > 6);
console.log(result);
// expected output: Array ["exuberant", "destruction", "present"]