Mastering Regular Expressions in Go

Go has an inbuilt regexp package which supports regular expression by the RE2 engine. This is because of this single and self-sufficient design choice, Go regexps are safe, predictable and production-ready. RE2 is guaranteed O(n) time with respect to input length, avoiding disastrous backtracking and ReDoS vulnerabilities - even with untrusted user input. 1. Compile vs MustCompile Before matching, a pattern must be compiled into a *regexp.Regexp . Two functions handle this: // Compile → returns