What are some common uses of regex in programming?

What are some common uses of regex in programming?

Regex, or regular expressions, are commonly used for tasks like validating input, searching text, and data extraction.

Can you give me an example of how to validate an email address using regex?

Sure! A simple regex for validating an email address is: ^[\w-\.]+@[\w-]+\.[a-zA-Z]{2,}$. This checks for the general structure of an email.

What about using regex for searching text in a file?

You can use regex to search for patterns in text files. For example, in Python, you can use the re module to find all occurrences of a pattern.

Are there any performance concerns when using regex?

Yes, regex can be slow for complex patterns or large texts. It's important to optimize your regex patterns to avoid performance issues.