is there a elegant way to parse a word and add spaces before capital letters

Question

i need to parse some data and i want to convert

AutomaticTrackingSystem

to

Automatic Tracking System

esse

Answer 1

Try this:

using System;
using System.Linq;
using System.Text.RegularExpressions;

class MainClass
{
    public static void Main (string[] args)
    {
        var rx = new Regex
                (@"([a-z]+[A-Z]|[A-Z][A-Z]+|[A-Z]|[^A-Za-z][^A-Za-z]+)");

        string[] tests = {
        "AutomaticTrackingSystem",
        "XMLEditor",
        "AnXMLAndXSLT2.0Tool",
        "NumberOfABCDThings",
        "AGoodMan",
        "CodeOfAGoodMan"
        };

        foreach(string t in tests)
        {
            string y = Reverse(t);
            string x = Reverse( rx.Replace(y, @" $1") );
            Console.WriteLine("\n\n{0} -- {1}",y,x);    
        }

    }

    static string Reverse(string s)
    {
        var ca = s.ToCharArray();
        Array.Reverse(ca);
        string t = new string(ca);
        return t;
    }

}

Output:

metsySgnikcarTcitamotuA -- Automatic Tracking System 


rotidELMX -- XML Editor 


looT0.2TLSXdnALMXnA -- An XML And XSLT 2.0 Tool 


sgnihTDCBAfOrebmuN -- Number Of ABCD Things 


naMdooGA -- A Good Man 


naMdooGAfOedoC -- Code Of A Good Man 

It works by scanning the string backward, and making the capital letter the terminator. Wishing there's a parameter for RegEx for scanning the string backwards, so the above separate string reversal won't be needed anymore :-)