Casimir et Hippolyte questions

Casimir et Hippolyte answers

• Extract first number(s) from variable [duplicate]
• preg_match a programming string
• identifying repeating numbers or number patterns in php
• Regular expression to match a string in incorrect case
• vscode regex find/replace replace characters inside string
• Python Regex to match the FIRST repetition of a digit
• How to correct my regex to not match particular expressions starting with a character
• Warning: preg_match(): Compilation failed: unrecognized character after (? or (?-
• Using Java's replaceAll to replace the whole string
• Adjust regex to also match partial expression