💡 As a regex expert in Java, I need a regex for validating URLs.

💡 Can you create a regex pattern in Python for parsing log files?

💡 I'm looking for a regex to extract phone numbers in JavaScript.

💡 Help me with a regex in C# to find all hashtags in a text.

💡 As a regex expert with proficiency in Python, please create a regular expression and provide a code example demonstrating its usage. Include a brief explanation of the regular expression and how the code example works. I need a regular expression for extracting email addresses from a text.