Regexp

• http://weitz.de/cl-ppcre/

• (ql:quickload :cl-ppcre)

Match

(if (cl-ppcre:scan "^[1-9]+$" "23-")
  (print "muh"))

Split

(cl-ppcre:split "\\s" "a cow says mooh")

Replace

(cl-ppcre:regexp-replace-all "\\d" "h4llo" "a\\1")