nicolasmendonca

function walkDOMTree(
  root,
  whatToShow = NodeFilter.SHOW_ALL,
  { inspect, collect, callback } = {}
) {
  const walker = document.createTreeWalker(root, whatToShow, {
    acceptNode(node) {
      if (inspect && !inspect(node)) {
        return NodeFilter.FILTER_REJECT;
      }

nicolasmendonca

Array.prototype.union = ( array ) => {
	const concatenated = this.concat( array );
	return concatenated.filter( ( item, pos ) => concatenated.indexOf( item ) === pos );
};

// example
[ 'a', 'b', 'c' ].union([ 'b', 'c', 'd', 'e' ]); // [ 'a', 'b', 'c', 'd', 'e' ]