From the footnote: "Well, actually, this does not work for arrays that contain undefined as a value, but we are not going to see that in our examples. A more r

From the footnote: "Well, actually, this does not work for arrays that contain undefined as a value, but we are not going to see that in our examples. A more robust implementation would be (array) => array.length === 0, but we are doing backflips to keep this within a very small and contrived playground.” http://raganwald.com/2015/02/02/destructuring.html#fn:wellactually http://raganwald.com/2015/02/02/destructuring.html#fn:wellac...