function pad(num, n) { return (Array(n).join(0) + num).slice(-n); } function noteSummary(str) { let result = ""; let matches = str.match(/\s/g).length + 1; let size = `${pad(matches, 4)}: ` let words = str.split(" "); let end = words.length - 2; for (var i = 0; i <= end; i++) { result += (wordsi0 ? wordsi0 : -) } return size + result; } console.log(noteSummary("A quick brown fox jumps over the lazy dog")); // Output: 0010: Aqbfjotld
