What are some useful regex tips and tricks?

What are some useful regex tips and tricks?

Here are a few tips: 1. Use anchors (^ and $) to match the start and end of strings. 2. Use non-capturing groups (?:...) to group without capturing. 3. Utilize character classes [abc] to match any character in the set.

Can you explain how to use lookaheads and lookbehinds?

Sure! Lookaheads (?=...) assert that a pattern follows, while lookbehinds (?<=...) assert that a pattern precedes. For example, \d(?=\D) matches a digit followed by a non-digit.

What are some common mistakes to avoid with regex?

Common mistakes include: 1. Forgetting to escape special characters. 2. Overusing greedy quantifiers. 3. Not testing regex patterns thoroughly.

How can I optimize my regex for performance?

To optimize regex, avoid backtracking by using possessive quantifiers, minimize the use of alternation, and prefer specific patterns over general ones.