入坑codewars第15天-Regexp Basics - is it IPv4 address?
题目:ImplementString#ipv4_address?,whichshouldreturntrueifgivenobjectisanIPv4address-fournumbers(0-255)separatedbydots.Itshouldonlyacceptaddressesincanonicalrepresentation,sonoleading0s,spacesetc.题意:题意: