amarsyla · January 19, 2019 00:52
diff --git a/array flatten b/array flatten
 const flatten = (array) => {
 	let flattened = [];
 	for (const item of array) {
  	flattened = flattened.concat(Array.isArray(item) ? flatten(item) : item);
  }
  return flattened;
 };

 console.log(flatten([[1,2,[3]],4])); // [1, 2, 3, 4]
	const flatten = (array) => {
	let flattened = [];
	for (const item of array) {
	flattened = flattened.concat(Array.isArray(item) ? flatten(item) : item);
	}
	return flattened;
	};

	console.log(flatten([[1,2,[3]],4])); // [1, 2, 3, 4]