Duplicate Character Counter in Mathematica

Welcome to the Duplicate Character Counter in Mathematica page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

(* Code *)

(* The inner function does the work, returning the output as a Mathematica list: *)

duplicateCharacterCounter = Function[{s},
   Select[
    {First[#], Length[#]} & /@ Gather[Characters[s]],
    #[[2]] > 1 &]];

(* The outer function performs the output text formatting: *)

duplicateCharacterCounterMain = s \[Function]
   Print[#[[1]], ": ", #[[2]]] & /@ duplicateCharacterCounter[s];


(* Valid Tests *)

duplicateCharacterCounterMain /@ {
   "goodbyeblues",
   "abba",
   "aAbB"
   };


(* Invalid Tests *)

Duplicate Character Counter in Mathematica was written by:

• Ben Hekster

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

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How to Run the Solution

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