Selectively replace multiple instances of a character within a string: Difference between revisions

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  abracadabra
   {A.new
-   aA aB a_ aC aD   // first "a", second "a", fourth "a", fifth "a"
+   aA aB a3 aC aD 3a   // save third "a" as "3" and restore it
-   bE               // first "b"
+   bE                  // first "b"
-   r_ rF            // second "r"
+   r1 rF 1r            // save first "a" as "1" and restore it
-   _r _a            // restore first "r" and third "a"
 }}
 -> AErBcadCbFD