gistfile1.txt

var arr = 'what on earth are you talking about'.split('');

// var vowelDoubler = (str) => {

// 	return str.replace(/[a||e||i||o||u]/gi, myFunc).split('');
// };

var vowelTest = (str) => {
	if (str.match(/[a||e||i||o||u]/gi)) {
		return true;
	} else {
		return false;
	}
}

// var myFunc = (str) => {
// 	if (vowelTest(str)) {
// 		return str + str;
//  	}
// }

// console.log(vowelTest('b'));
// console.log(vowelDoubler(string));


var vowelDoubler = (arr) => {
	for (var i = 0; i < arr.length; i++) {
		var curr = arr[i];
		if (vowelTest(curr)) { 
			arr.splice(i, 0, curr);
			i++;
		}
	}
	return arr;
}

console.log(vowelDoubler(arr));