JS Practice — Built-in Objects

String.prototype.match() — capture groups

📖 Usage Example

'test 123 foo'.match(/d+/)    // → ['123', index: 5, ...]
'test 1 and 2'.match(/d+/g)  // → ['1', '2']

Use match() to search a string against a regex and return the match results, or null if not found.

String.prototype.match() — Capture Groups

Without the g flag, .match() returns an array where index 0 is the full match and index 1, 2, … are capture groups.

Challenge: Implement parseDate(str) that extracts year, month, and day from 'YYYY-MM-DD' and returns them as numbers.

parseDate('2024-01-15') // → { year: 2024, month: 1, day: 15 }

💡 Hints (1)