The fourth bird questions

The fourth bird answers

• Regex Replace All But Pattern
• Regex for SoundCloud URL
• php preg_split split string to array from square brackets
• RegEx - Finding multiple dashes in entire string... and a little more
• Python regex matching group with multi-layer conditions
• RegEx for combining multiple sequences
• Regular expression to identify groups
• Python Regex Sentence Finder-Want to Ignore "a.m."
• Regex expression to check if first and last char of set are different
• Perl regex capture each character as one group