What are some common regex patterns I should know?

What are some common regex patterns I should know?

Common regex patterns include:

1. ^abc - Matches any string that starts with 'abc'.
2. abc$ - Matches any string that ends with 'abc'.
3. a.b - Matches any string with 'a', followed by any character, then 'b'.
4. \d - Matches any digit (0-9).
5. \w - Matches any word character (alphanumeric + underscore).

Can you explain how to use the \d pattern?

Sure! The \d pattern matches any single digit. For example, \d{2} would match any two-digit number like '12' or '99'. You can use it in a larger pattern to find numbers within text.

What about matching email addresses?

To match email addresses, you can use a pattern like ^[\w.-]+@[\w.-]+\.[a-zA-Z]{2,}$. This checks for a valid format with a username, domain, and top-level domain.

Are there any tools to test regex patterns?

Yes! There are several online tools like Regex101 and RegExr that allow you to test and debug your regex patterns interactively.