Initial select implementation for Regexes.

src/clj/com/rpl/specter.cljc

@@ -1170,6 +1170,10 @@
   ImplicitNav
   (implicit-nav [this] (pred this)))
 
+(extend-type #?(:clj java.util.regex.Pattern :cljs RegExp)
+  ImplicitNav
+  (implicit-nav [this] (n/regex* this)))
+
 (defnav
   ^{:doc "Navigates to the provided val if the structure is nil. Otherwise it stays
           navigated at the structure."}

src/clj/com/rpl/specter/navs.cljc

@@ -622,6 +622,14 @@
     (do-keypath-transform vals structure key next-fn)
     ))
 
+(defrichnav ^{:doc "Navigates to the regex applied to a string, navigating to nil if it does not exist or nothing is found."}
+  ;;           Setting the value to NONE will remove it from the collection.}
+  regex*
+  [re]
+  (select* [this vals structure next-fn]
+           (next-fn vals (re-find re structure)))
+  #_(transform* [this vals structure next-fn]
+                (next-fn (clojure.string/replace structure re vals))))
 
 (defrichnav
   ^{:doc "Navigates to the key only if it exists in the map. Setting the value to NONE