C# IndexOf, when word is part of another word, How to?





.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}







1















let's say I have string "soak oak" and I want to have string index of ("oak"), it returns me the index of where "oak" starts in "soak" (1) but I want to find index of exact word "oak" (5), what do I need to do? 



string text = "soak oak";

char seperators = {' ', '.', ',', '!', '?', ':',

        ';', '(', ')', 't', 'r', 'n', '"', '„', '“'};

string parts = text.Split(seperators,

                        StringSplitOptions.RemoveEmptyEntries);

text.IndexOf("oak"); // gets '1' because "oak" is in "soak"

                     // but I want to get 5 because of exact word "oak"





c# string







share|improve this question




















  • 2





    You are searching inside the string text instead of the string parts.

    – Peter B
    Nov 22 '18 at 10:59






  • 2





    you're most of the way there... You've split the text by separators into parts. Now you just need to check if any of those parts are exactly "oak"

    – James
    Nov 22 '18 at 10:59











  • You need to implement an algorithm for it.Step 1. Push all characters into an array, Step 2. Check first letter of the array or letter after a space is starting with the keyword you are looking for. step 3: On start letter char match, loop for consecutive char to match the rest of the keywords. step 4: if all char match found then the first char index is your required ANSWER!!

    – Pranesh Janarthanan
    Nov 22 '18 at 11:08











  • You could make use of the System.Text.RegularExpression namespace. Here is an example of matching a whole word using Regex: regex101.com/r/7ijsEh/1 . You can then use Regex.Match(text, "boakb").Index. See here: dotnetfiddle.net/94XDQb

    – DParry
    Nov 22 '18 at 11:15


















1















let's say I have string "soak oak" and I want to have string index of ("oak"), it returns me the index of where "oak" starts in "soak" (1) but I want to find index of exact word "oak" (5), what do I need to do? 



string text = "soak oak";

char seperators = {' ', '.', ',', '!', '?', ':',

        ';', '(', ')', 't', 'r', 'n', '"', '„', '“'};

string parts = text.Split(seperators,

                        StringSplitOptions.RemoveEmptyEntries);

text.IndexOf("oak"); // gets '1' because "oak" is in "soak"

                     // but I want to get 5 because of exact word "oak"





c# string







share|improve this question




















  • 2





    You are searching inside the string text instead of the string parts.

    – Peter B
    Nov 22 '18 at 10:59






  • 2





    you're most of the way there... You've split the text by separators into parts. Now you just need to check if any of those parts are exactly "oak"

    – James
    Nov 22 '18 at 10:59











  • You need to implement an algorithm for it.Step 1. Push all characters into an array, Step 2. Check first letter of the array or letter after a space is starting with the keyword you are looking for. step 3: On start letter char match, loop for consecutive char to match the rest of the keywords. step 4: if all char match found then the first char index is your required ANSWER!!

    – Pranesh Janarthanan
    Nov 22 '18 at 11:08











  • You could make use of the System.Text.RegularExpression namespace. Here is an example of matching a whole word using Regex: regex101.com/r/7ijsEh/1 . You can then use Regex.Match(text, "boakb").Index. See here: dotnetfiddle.net/94XDQb

    – DParry
    Nov 22 '18 at 11:15














1












1








1








let's say I have string "soak oak" and I want to have string index of ("oak"), it returns me the index of where "oak" starts in "soak" (1) but I want to find index of exact word "oak" (5), what do I need to do? 



string text = "soak oak";

char seperators = {' ', '.', ',', '!', '?', ':',

        ';', '(', ')', 't', 'r', 'n', '"', '„', '“'};

string parts = text.Split(seperators,

                        StringSplitOptions.RemoveEmptyEntries);

text.IndexOf("oak"); // gets '1' because "oak" is in "soak"

                     // but I want to get 5 because of exact word "oak"





c# string







share|improve this question
















let's say I have string "soak oak" and I want to have string index of ("oak"), it returns me the index of where "oak" starts in "soak" (1) but I want to find index of exact word "oak" (5), what do I need to do? 



string text = "soak oak";

char seperators = {' ', '.', ',', '!', '?', ':',

        ';', '(', ')', 't', 'r', 'n', '"', '„', '“'};

string parts = text.Split(seperators,

                        StringSplitOptions.RemoveEmptyEntries);

text.IndexOf("oak"); // gets '1' because "oak" is in "soak"

                     // but I want to get 5 because of exact word "oak"





c# string




c# string






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 22 '18 at 11:40









Dmitry Bychenko

112k1099142




112k1099142










asked Nov 22 '18 at 10:56









GoodnightJessGoodnightJess

255




255








  • 2





    You are searching inside the string text instead of the string parts.

    – Peter B
    Nov 22 '18 at 10:59






  • 2





    you're most of the way there... You've split the text by separators into parts. Now you just need to check if any of those parts are exactly "oak"

    – James
    Nov 22 '18 at 10:59











  • You need to implement an algorithm for it.Step 1. Push all characters into an array, Step 2. Check first letter of the array or letter after a space is starting with the keyword you are looking for. step 3: On start letter char match, loop for consecutive char to match the rest of the keywords. step 4: if all char match found then the first char index is your required ANSWER!!

    – Pranesh Janarthanan
    Nov 22 '18 at 11:08











  • You could make use of the System.Text.RegularExpression namespace. Here is an example of matching a whole word using Regex: regex101.com/r/7ijsEh/1 . You can then use Regex.Match(text, "boakb").Index. See here: dotnetfiddle.net/94XDQb

    – DParry
    Nov 22 '18 at 11:15














  • 2





    You are searching inside the string text instead of the string parts.

    – Peter B
    Nov 22 '18 at 10:59






  • 2





    you're most of the way there... You've split the text by separators into parts. Now you just need to check if any of those parts are exactly "oak"

    – James
    Nov 22 '18 at 10:59











  • You need to implement an algorithm for it.Step 1. Push all characters into an array, Step 2. Check first letter of the array or letter after a space is starting with the keyword you are looking for. step 3: On start letter char match, loop for consecutive char to match the rest of the keywords. step 4: if all char match found then the first char index is your required ANSWER!!

    – Pranesh Janarthanan
    Nov 22 '18 at 11:08











  • You could make use of the System.Text.RegularExpression namespace. Here is an example of matching a whole word using Regex: regex101.com/r/7ijsEh/1 . You can then use Regex.Match(text, "boakb").Index. See here: dotnetfiddle.net/94XDQb

    – DParry
    Nov 22 '18 at 11:15








2




2





You are searching inside the string text instead of the string parts.

– Peter B
Nov 22 '18 at 10:59





You are searching inside the string text instead of the string parts.

– Peter B
Nov 22 '18 at 10:59




2




2





you're most of the way there... You've split the text by separators into parts. Now you just need to check if any of those parts are exactly "oak"

– James
Nov 22 '18 at 10:59





you're most of the way there... You've split the text by separators into parts. Now you just need to check if any of those parts are exactly "oak"

– James
Nov 22 '18 at 10:59













You need to implement an algorithm for it.Step 1. Push all characters into an array, Step 2. Check first letter of the array or letter after a space is starting with the keyword you are looking for. step 3: On start letter char match, loop for consecutive char to match the rest of the keywords. step 4: if all char match found then the first char index is your required ANSWER!!

– Pranesh Janarthanan
Nov 22 '18 at 11:08





You need to implement an algorithm for it.Step 1. Push all characters into an array, Step 2. Check first letter of the array or letter after a space is starting with the keyword you are looking for. step 3: On start letter char match, loop for consecutive char to match the rest of the keywords. step 4: if all char match found then the first char index is your required ANSWER!!

– Pranesh Janarthanan
Nov 22 '18 at 11:08













You could make use of the System.Text.RegularExpression namespace. Here is an example of matching a whole word using Regex: regex101.com/r/7ijsEh/1 . You can then use Regex.Match(text, "boakb").Index. See here: dotnetfiddle.net/94XDQb

– DParry
Nov 22 '18 at 11:15





You could make use of the System.Text.RegularExpression namespace. Here is an example of matching a whole word using Regex: regex101.com/r/7ijsEh/1 . You can then use Regex.Match(text, "boakb").Index. See here: dotnetfiddle.net/94XDQb

– DParry
Nov 22 '18 at 11:15












6 Answers
6






active

oldest

votes


















0














We can test indexes (IndexOf) in a loop:



static HashSet<char> s_Separtors = new HashSet<char>() {

  ' ', '.', ',', '!', '?', ':', ';', '(', ')', 't', 'r', 'n', '"', '„', '“'

};



private static int WordIndexOf(string source, string toFind) {

  if (string.IsNullOrEmpty(source) || string.IsNullOrEmpty(toFind))

    return -1;



  for (int index = source.IndexOf(toFind); 

       index >= 0; 

       index = source.IndexOf(toFind, index + 1)) {

    if (index < 0)

      return -1;



    if ((index == 0 || s_Separtors.Contains(source[index - 1])) &&

        (index >= source.Length - toFind.Length || 

         s_Separtors.Contains(source[index + toFind.Length])))

      return index;

  }



  return -1;

}


Demo:



// 5

Console.Write(WordIndexOf("soak oak", "oak"));





share|improve this answer































    3














    Regex approach



    string text = "soak oak";
    
int result = Regex.Match(text, @"boakb").Index;





    share|improve this answer





















    • 1





      or you could use "boakb", which looks for word boundaries

      – Robin Bennett
      Nov 22 '18 at 11:08











    • string text = "soak oak"; var match = Regex.Match(text, @"s[oak]"); if (match.Success) { Console.WriteLine(match.Index); // 4 }

      – Aakarsh Dhawan
      Nov 22 '18 at 11:14











    • string text = "I can see antoak." Expected: 13, actual: 0

      – Dmitry Bychenko
      Nov 22 '18 at 11:16











    • @RobinBennett thanks, I've updated my code to your suggestion

      – fubo
      Nov 22 '18 at 12:18



















    1














    You may use below regex to find exact word in your string.



    string text = "soak oak";
    
string searchText = "oak";
    
var index = Regex.Match(text, @"b" + Regex.Escape(searchText) + @"b").Index;


    Output:



    5


    See the demo






    share|improve this answer


























    • @"b" + Regex.Escape(searchText) + @"b" to be on the safe side

      – Dmitry Bychenko
      Nov 22 '18 at 11:18











    • @DmitryBychenko, thanks for improvement, answer updated :)

      – er-sho
      Nov 22 '18 at 11:19



















    0














    You can use regular expressions, you may also find it useful to use word boundaries defined by regular expressions:



    string text = "soak oak";
    
var pattern = @"boakb";
    
var regex = new Regex(pattern);
    
foreach(Match m in regex.Matches(text)){
    
    Console.WriteLine(m.Index);
    
    Console.WriteLine(m.Value);
    
}





    share|improve this answer































      0














      You could find the string in your array by converting it to a list and using the IndexOf() method.



      parts.ToList().IndexOf("oak");


      That tells you which array item it is, rather than the index in the original string.






      share|improve this answer































        0














        Another RegEx approach-



            string text = "soak oak";
        
    var match = Regex.Match(text, @"s[oak]");
        
    if (match.Success)
        
    {
        
        Console.WriteLine(match.Index); // 4
        
    }



        • s White space


        Hope it helps.






        share|improve this answer
























        • [oak] is inccorect here: counter example is "a kao is not an oak"

          – Dmitry Bychenko
          Nov 22 '18 at 11:19













        • @DmitryBychenko Yes, you are correct. Thanks. How about this though, @"s(oak)"?

          – Aakarsh Dhawan
          Nov 22 '18 at 11:40













        • "oak" is a counter example for @"s(oak)": we don't want explicit s in the pattern; please, have a look at er-shoaib's answer

          – Dmitry Bychenko
          Nov 22 '18 at 11:42














        Your Answer






        StackExchange.ifUsing("editor", function () {
        StackExchange.using("externalEditor", function () {
        StackExchange.using("snippets", function () {
        StackExchange.snippets.init();
        });
        });
        }, "code-snippets");

        StackExchange.ready(function() {
        var channelOptions = {
        tags: "".split(" "),
        id: "1"
        };
        initTagRenderer("".split(" "), "".split(" "), channelOptions);

        StackExchange.using("externalEditor", function() {
        // Have to fire editor after snippets, if snippets enabled
        if (StackExchange.settings.snippets.snippetsEnabled) {
        StackExchange.using("snippets", function() {
        createEditor();
        });
        }
        else {
        createEditor();
        }
        });

        function createEditor() {
        StackExchange.prepareEditor({
        heartbeatType: 'answer',
        autoActivateHeartbeat: false,
        convertImagesToLinks: true,
        noModals: true,
        showLowRepImageUploadWarning: true,
        reputationToPostImages: 10,
        bindNavPrevention: true,
        postfix: "",
        imageUploader: {
        brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
        contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
        allowUrls: true
        },
        onDemand: true,
        discardSelector: ".discard-answer"
        ,immediatelyShowMarkdownHelp:true
        });


        }
        });














        draft saved

        draft discarded


















        StackExchange.ready(
        function () {
        StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53429394%2fc-sharp-indexof-when-word-is-part-of-another-word-how-to%23new-answer', 'question_page');
        }
        );

        Post as a guest















        Required, but never shown

























        6 Answers
        6






        active

        oldest

        votes








        6 Answers
        6






        active

        oldest

        votes









        active

        oldest

        votes






        active

        oldest

        votes









        0














        We can test indexes (IndexOf) in a loop:



        static HashSet<char> s_Separtors = new HashSet<char>() {
        
  ' ', '.', ',', '!', '?', ':', ';', '(', ')', 't', 'r', 'n', '"', '„', '“'
        
};
        

        
private static int WordIndexOf(string source, string toFind) {
        
  if (string.IsNullOrEmpty(source) || string.IsNullOrEmpty(toFind))
        
    return -1;
        

        
  for (int index = source.IndexOf(toFind); 
        
       index >= 0; 
        
       index = source.IndexOf(toFind, index + 1)) {
        
    if (index < 0)
        
      return -1;
        

        
    if ((index == 0 || s_Separtors.Contains(source[index - 1])) &&
        
        (index >= source.Length - toFind.Length || 
        
         s_Separtors.Contains(source[index + toFind.Length])))
        
      return index;
        
  }
        

        
  return -1;
        
}


        Demo:



        // 5
        
Console.Write(WordIndexOf("soak oak", "oak"));





        share|improve this answer




























          0














          We can test indexes (IndexOf) in a loop:



          static HashSet<char> s_Separtors = new HashSet<char>() {
          
  ' ', '.', ',', '!', '?', ':', ';', '(', ')', 't', 'r', 'n', '"', '„', '“'
          
};
          

          
private static int WordIndexOf(string source, string toFind) {
          
  if (string.IsNullOrEmpty(source) || string.IsNullOrEmpty(toFind))
          
    return -1;
          

          
  for (int index = source.IndexOf(toFind); 
          
       index >= 0; 
          
       index = source.IndexOf(toFind, index + 1)) {
          
    if (index < 0)
          
      return -1;
          

          
    if ((index == 0 || s_Separtors.Contains(source[index - 1])) &&
          
        (index >= source.Length - toFind.Length || 
          
         s_Separtors.Contains(source[index + toFind.Length])))
          
      return index;
          
  }
          

          
  return -1;
          
}


          Demo:



          // 5
          
Console.Write(WordIndexOf("soak oak", "oak"));





          share|improve this answer


























            0












            0








            0







            We can test indexes (IndexOf) in a loop:



            static HashSet<char> s_Separtors = new HashSet<char>() {
            
  ' ', '.', ',', '!', '?', ':', ';', '(', ')', 't', 'r', 'n', '"', '„', '“'
            
};
            

            
private static int WordIndexOf(string source, string toFind) {
            
  if (string.IsNullOrEmpty(source) || string.IsNullOrEmpty(toFind))
            
    return -1;
            

            
  for (int index = source.IndexOf(toFind); 
            
       index >= 0; 
            
       index = source.IndexOf(toFind, index + 1)) {
            
    if (index < 0)
            
      return -1;
            

            
    if ((index == 0 || s_Separtors.Contains(source[index - 1])) &&
            
        (index >= source.Length - toFind.Length || 
            
         s_Separtors.Contains(source[index + toFind.Length])))
            
      return index;
            
  }
            

            
  return -1;
            
}


            Demo:



            // 5
            
Console.Write(WordIndexOf("soak oak", "oak"));





            share|improve this answer













            We can test indexes (IndexOf) in a loop:



            static HashSet<char> s_Separtors = new HashSet<char>() {
            
  ' ', '.', ',', '!', '?', ':', ';', '(', ')', 't', 'r', 'n', '"', '„', '“'
            
};
            

            
private static int WordIndexOf(string source, string toFind) {
            
  if (string.IsNullOrEmpty(source) || string.IsNullOrEmpty(toFind))
            
    return -1;
            

            
  for (int index = source.IndexOf(toFind); 
            
       index >= 0; 
            
       index = source.IndexOf(toFind, index + 1)) {
            
    if (index < 0)
            
      return -1;
            

            
    if ((index == 0 || s_Separtors.Contains(source[index - 1])) &&
            
        (index >= source.Length - toFind.Length || 
            
         s_Separtors.Contains(source[index + toFind.Length])))
            
      return index;
            
  }
            

            
  return -1;
            
}


            Demo:



            // 5
            
Console.Write(WordIndexOf("soak oak", "oak"));






            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Nov 22 '18 at 11:11









            Dmitry BychenkoDmitry Bychenko

            112k1099142




            112k1099142

























                3














                Regex approach



                string text = "soak oak";
                
int result = Regex.Match(text, @"boakb").Index;





                share|improve this answer





















                • 1





                  or you could use "boakb", which looks for word boundaries

                  – Robin Bennett
                  Nov 22 '18 at 11:08











                • string text = "soak oak"; var match = Regex.Match(text, @"s[oak]"); if (match.Success) { Console.WriteLine(match.Index); // 4 }

                  – Aakarsh Dhawan
                  Nov 22 '18 at 11:14











                • string text = "I can see antoak." Expected: 13, actual: 0

                  – Dmitry Bychenko
                  Nov 22 '18 at 11:16











                • @RobinBennett thanks, I've updated my code to your suggestion

                  – fubo
                  Nov 22 '18 at 12:18
















                3














                Regex approach



                string text = "soak oak";
                
int result = Regex.Match(text, @"boakb").Index;





                share|improve this answer





















                • 1





                  or you could use "boakb", which looks for word boundaries

                  – Robin Bennett
                  Nov 22 '18 at 11:08











                • string text = "soak oak"; var match = Regex.Match(text, @"s[oak]"); if (match.Success) { Console.WriteLine(match.Index); // 4 }

                  – Aakarsh Dhawan
                  Nov 22 '18 at 11:14











                • string text = "I can see antoak." Expected: 13, actual: 0

                  – Dmitry Bychenko
                  Nov 22 '18 at 11:16











                • @RobinBennett thanks, I've updated my code to your suggestion

                  – fubo
                  Nov 22 '18 at 12:18














                3












                3








                3







                Regex approach



                string text = "soak oak";
                
int result = Regex.Match(text, @"boakb").Index;





                share|improve this answer















                Regex approach



                string text = "soak oak";
                
int result = Regex.Match(text, @"boakb").Index;






                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Nov 22 '18 at 12:17

























                answered Nov 22 '18 at 11:06









                fubofubo

                31.1k970107




                31.1k970107








                • 1





                  or you could use "boakb", which looks for word boundaries

                  – Robin Bennett
                  Nov 22 '18 at 11:08











                • string text = "soak oak"; var match = Regex.Match(text, @"s[oak]"); if (match.Success) { Console.WriteLine(match.Index); // 4 }

                  – Aakarsh Dhawan
                  Nov 22 '18 at 11:14











                • string text = "I can see antoak." Expected: 13, actual: 0

                  – Dmitry Bychenko
                  Nov 22 '18 at 11:16











                • @RobinBennett thanks, I've updated my code to your suggestion

                  – fubo
                  Nov 22 '18 at 12:18














                • 1





                  or you could use "boakb", which looks for word boundaries

                  – Robin Bennett
                  Nov 22 '18 at 11:08











                • string text = "soak oak"; var match = Regex.Match(text, @"s[oak]"); if (match.Success) { Console.WriteLine(match.Index); // 4 }

                  – Aakarsh Dhawan
                  Nov 22 '18 at 11:14











                • string text = "I can see antoak." Expected: 13, actual: 0

                  – Dmitry Bychenko
                  Nov 22 '18 at 11:16











                • @RobinBennett thanks, I've updated my code to your suggestion

                  – fubo
                  Nov 22 '18 at 12:18








                1




                1





                or you could use "boakb", which looks for word boundaries

                – Robin Bennett
                Nov 22 '18 at 11:08





                or you could use "boakb", which looks for word boundaries

                – Robin Bennett
                Nov 22 '18 at 11:08













                string text = "soak oak"; var match = Regex.Match(text, @"s[oak]"); if (match.Success) { Console.WriteLine(match.Index); // 4 }

                – Aakarsh Dhawan
                Nov 22 '18 at 11:14





                string text = "soak oak"; var match = Regex.Match(text, @"s[oak]"); if (match.Success) { Console.WriteLine(match.Index); // 4 }

                – Aakarsh Dhawan
                Nov 22 '18 at 11:14













                string text = "I can see antoak." Expected: 13, actual: 0

                – Dmitry Bychenko
                Nov 22 '18 at 11:16





                string text = "I can see antoak." Expected: 13, actual: 0

                – Dmitry Bychenko
                Nov 22 '18 at 11:16













                @RobinBennett thanks, I've updated my code to your suggestion

                – fubo
                Nov 22 '18 at 12:18





                @RobinBennett thanks, I've updated my code to your suggestion

                – fubo
                Nov 22 '18 at 12:18











                1














                You may use below regex to find exact word in your string.



                string text = "soak oak";
                
string searchText = "oak";
                
var index = Regex.Match(text, @"b" + Regex.Escape(searchText) + @"b").Index;


                Output:



                5


                See the demo






                share|improve this answer


























                • @"b" + Regex.Escape(searchText) + @"b" to be on the safe side

                  – Dmitry Bychenko
                  Nov 22 '18 at 11:18











                • @DmitryBychenko, thanks for improvement, answer updated :)

                  – er-sho
                  Nov 22 '18 at 11:19
















                1














                You may use below regex to find exact word in your string.



                string text = "soak oak";
                
string searchText = "oak";
                
var index = Regex.Match(text, @"b" + Regex.Escape(searchText) + @"b").Index;


                Output:



                5


                See the demo






                share|improve this answer


























                • @"b" + Regex.Escape(searchText) + @"b" to be on the safe side

                  – Dmitry Bychenko
                  Nov 22 '18 at 11:18











                • @DmitryBychenko, thanks for improvement, answer updated :)

                  – er-sho
                  Nov 22 '18 at 11:19














                1












                1








                1







                You may use below regex to find exact word in your string.



                string text = "soak oak";
                
string searchText = "oak";
                
var index = Regex.Match(text, @"b" + Regex.Escape(searchText) + @"b").Index;


                Output:



                5


                See the demo






                share|improve this answer















                You may use below regex to find exact word in your string.



                string text = "soak oak";
                
string searchText = "oak";
                
var index = Regex.Match(text, @"b" + Regex.Escape(searchText) + @"b").Index;


                Output:



                5


                See the demo







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Nov 22 '18 at 11:19

























                answered Nov 22 '18 at 11:12









                er-shoer-sho

                7,1402619




                7,1402619













                • @"b" + Regex.Escape(searchText) + @"b" to be on the safe side

                  – Dmitry Bychenko
                  Nov 22 '18 at 11:18











                • @DmitryBychenko, thanks for improvement, answer updated :)

                  – er-sho
                  Nov 22 '18 at 11:19



















                • @"b" + Regex.Escape(searchText) + @"b" to be on the safe side

                  – Dmitry Bychenko
                  Nov 22 '18 at 11:18











                • @DmitryBychenko, thanks for improvement, answer updated :)

                  – er-sho
                  Nov 22 '18 at 11:19

















                @"b" + Regex.Escape(searchText) + @"b" to be on the safe side

                – Dmitry Bychenko
                Nov 22 '18 at 11:18





                @"b" + Regex.Escape(searchText) + @"b" to be on the safe side

                – Dmitry Bychenko
                Nov 22 '18 at 11:18













                @DmitryBychenko, thanks for improvement, answer updated :)

                – er-sho
                Nov 22 '18 at 11:19





                @DmitryBychenko, thanks for improvement, answer updated :)

                – er-sho
                Nov 22 '18 at 11:19











                0














                You can use regular expressions, you may also find it useful to use word boundaries defined by regular expressions:



                string text = "soak oak";
                
var pattern = @"boakb";
                
var regex = new Regex(pattern);
                
foreach(Match m in regex.Matches(text)){
                
    Console.WriteLine(m.Index);
                
    Console.WriteLine(m.Value);
                
}





                share|improve this answer




























                  0














                  You can use regular expressions, you may also find it useful to use word boundaries defined by regular expressions:



                  string text = "soak oak";
                  
var pattern = @"boakb";
                  
var regex = new Regex(pattern);
                  
foreach(Match m in regex.Matches(text)){
                  
    Console.WriteLine(m.Index);
                  
    Console.WriteLine(m.Value);
                  
}





                  share|improve this answer


























                    0












                    0








                    0







                    You can use regular expressions, you may also find it useful to use word boundaries defined by regular expressions:



                    string text = "soak oak";
                    
var pattern = @"boakb";
                    
var regex = new Regex(pattern);
                    
foreach(Match m in regex.Matches(text)){
                    
    Console.WriteLine(m.Index);
                    
    Console.WriteLine(m.Value);
                    
}





                    share|improve this answer













                    You can use regular expressions, you may also find it useful to use word boundaries defined by regular expressions:



                    string text = "soak oak";
                    
var pattern = @"boakb";
                    
var regex = new Regex(pattern);
                    
foreach(Match m in regex.Matches(text)){
                    
    Console.WriteLine(m.Index);
                    
    Console.WriteLine(m.Value);
                    
}






                    share|improve this answer












                    share|improve this answer



                    share|improve this answer










                    answered Nov 22 '18 at 11:11









                    Muaz OthmanMuaz Othman

                    362313




                    362313























                        0














                        You could find the string in your array by converting it to a list and using the IndexOf() method.



                        parts.ToList().IndexOf("oak");


                        That tells you which array item it is, rather than the index in the original string.






                        share|improve this answer




























                          0














                          You could find the string in your array by converting it to a list and using the IndexOf() method.



                          parts.ToList().IndexOf("oak");


                          That tells you which array item it is, rather than the index in the original string.






                          share|improve this answer


























                            0












                            0








                            0







                            You could find the string in your array by converting it to a list and using the IndexOf() method.



                            parts.ToList().IndexOf("oak");


                            That tells you which array item it is, rather than the index in the original string.






                            share|improve this answer













                            You could find the string in your array by converting it to a list and using the IndexOf() method.



                            parts.ToList().IndexOf("oak");


                            That tells you which array item it is, rather than the index in the original string.







                            share|improve this answer












                            share|improve this answer



                            share|improve this answer










                            answered Nov 22 '18 at 11:12









                            Robin BennettRobin Bennett

                            1,925413




                            1,925413























                                0














                                Another RegEx approach-



                                    string text = "soak oak";
                                
    var match = Regex.Match(text, @"s[oak]");
                                
    if (match.Success)
                                
    {
                                
        Console.WriteLine(match.Index); // 4
                                
    }



                                • s White space


                                Hope it helps.






                                share|improve this answer
























                                • [oak] is inccorect here: counter example is "a kao is not an oak"

                                  – Dmitry Bychenko
                                  Nov 22 '18 at 11:19













                                • @DmitryBychenko Yes, you are correct. Thanks. How about this though, @"s(oak)"?

                                  – Aakarsh Dhawan
                                  Nov 22 '18 at 11:40













                                • "oak" is a counter example for @"s(oak)": we don't want explicit s in the pattern; please, have a look at er-shoaib's answer

                                  – Dmitry Bychenko
                                  Nov 22 '18 at 11:42


















                                0














                                Another RegEx approach-



                                    string text = "soak oak";
                                
    var match = Regex.Match(text, @"s[oak]");
                                
    if (match.Success)
                                
    {
                                
        Console.WriteLine(match.Index); // 4
                                
    }



                                • s White space


                                Hope it helps.






                                share|improve this answer
























                                • [oak] is inccorect here: counter example is "a kao is not an oak"

                                  – Dmitry Bychenko
                                  Nov 22 '18 at 11:19













                                • @DmitryBychenko Yes, you are correct. Thanks. How about this though, @"s(oak)"?

                                  – Aakarsh Dhawan
                                  Nov 22 '18 at 11:40













                                • "oak" is a counter example for @"s(oak)": we don't want explicit s in the pattern; please, have a look at er-shoaib's answer

                                  – Dmitry Bychenko
                                  Nov 22 '18 at 11:42
















                                0












                                0








                                0







                                Another RegEx approach-



                                    string text = "soak oak";
                                
    var match = Regex.Match(text, @"s[oak]");
                                
    if (match.Success)
                                
    {
                                
        Console.WriteLine(match.Index); // 4
                                
    }



                                • s White space


                                Hope it helps.






                                share|improve this answer













                                Another RegEx approach-



                                    string text = "soak oak";
                                
    var match = Regex.Match(text, @"s[oak]");
                                
    if (match.Success)
                                
    {
                                
        Console.WriteLine(match.Index); // 4
                                
    }



                                • s White space


                                Hope it helps.







                                share|improve this answer












                                share|improve this answer



                                share|improve this answer










                                answered Nov 22 '18 at 11:13









                                Aakarsh DhawanAakarsh Dhawan

                                1196




                                1196













                                • [oak] is inccorect here: counter example is "a kao is not an oak"

                                  – Dmitry Bychenko
                                  Nov 22 '18 at 11:19













                                • @DmitryBychenko Yes, you are correct. Thanks. How about this though, @"s(oak)"?

                                  – Aakarsh Dhawan
                                  Nov 22 '18 at 11:40













                                • "oak" is a counter example for @"s(oak)": we don't want explicit s in the pattern; please, have a look at er-shoaib's answer

                                  – Dmitry Bychenko
                                  Nov 22 '18 at 11:42





















                                • [oak] is inccorect here: counter example is "a kao is not an oak"

                                  – Dmitry Bychenko
                                  Nov 22 '18 at 11:19













                                • @DmitryBychenko Yes, you are correct. Thanks. How about this though, @"s(oak)"?

                                  – Aakarsh Dhawan
                                  Nov 22 '18 at 11:40













                                • "oak" is a counter example for @"s(oak)": we don't want explicit s in the pattern; please, have a look at er-shoaib's answer

                                  – Dmitry Bychenko
                                  Nov 22 '18 at 11:42



















                                [oak] is inccorect here: counter example is "a kao is not an oak"

                                – Dmitry Bychenko
                                Nov 22 '18 at 11:19







                                [oak] is inccorect here: counter example is "a kao is not an oak"

                                – Dmitry Bychenko
                                Nov 22 '18 at 11:19















                                @DmitryBychenko Yes, you are correct. Thanks. How about this though, @"s(oak)"?

                                – Aakarsh Dhawan
                                Nov 22 '18 at 11:40







                                @DmitryBychenko Yes, you are correct. Thanks. How about this though, @"s(oak)"?

                                – Aakarsh Dhawan
                                Nov 22 '18 at 11:40















                                "oak" is a counter example for @"s(oak)": we don't want explicit s in the pattern; please, have a look at er-shoaib's answer

                                – Dmitry Bychenko
                                Nov 22 '18 at 11:42







                                "oak" is a counter example for @"s(oak)": we don't want explicit s in the pattern; please, have a look at er-shoaib's answer

                                – Dmitry Bychenko
                                Nov 22 '18 at 11:42




















                                draft saved

                                draft discarded




















































                                Thanks for contributing an answer to Stack Overflow!


                                • Please be sure to answer the question. Provide details and share your research!

                                But avoid …



                                • Asking for help, clarification, or responding to other answers.

                                • Making statements based on opinion; back them up with references or personal experience.


                                To learn more, see our tips on writing great answers.




                                draft saved


                                draft discarded














                                StackExchange.ready(
                                function () {
                                StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53429394%2fc-sharp-indexof-when-word-is-part-of-another-word-how-to%23new-answer', 'question_page');
                                }
                                );

                                Post as a guest















                                Required, but never shown





















































                                Required, but never shown














                                Required, but never shown












                                Required, but never shown







                                Required, but never shown

































                                Required, but never shown














                                Required, but never shown












                                Required, but never shown







                                Required, but never shown







                                -

                                Popular posts from this blog

                                Guess what letter conforming each word

                                Image
                                6 $begingroup$ This is an entry in the Fortnightly Topic Challenge #41: Short and Sweet. 1 letter only could be mean anything . With an additional letter in front , could be used as medicine component and something you definitely learn or at least heard once. Add another letter in front , you would possibly hear that many times . Add an additional letter in front , you would found an independent country . With an additional letter, in the end , you would found something related to apple . Add another letter in the end , you would found something bad . Hint: Each letter is unique . word knowledge letters chemistry share | improve this question ...
                                Read more

                                Run scheduled task as local user group (not BUILTIN)

                                Image
                                0 I am trying to run a scheduled task with User Group (not a single user). This is working fine when I in the field "when running a task, use the following user account:" insert BUILTIN User Group (for example: Administrators or Users). But when I try it with the created Local User Group (example: TestGroup) it is not working. The Users in the TestGroup are the same as in the Administrators group. What could be the problem? Are there some restrictions to the Created User Group compared to BUILTINUsers? scheduled-tasks taskscheduler windowstaskschedule share | improve this question asked Nov 15 '18 at 15:36 Far...
                                Read more

                                Port of Spain

                                Image
                                For ports in the country of Spain, see List of ports in Spain. City in City of Port of Spain, Trinidad and Tobago Port of Spain City City of Port of Spain Top to bottom (left to right): Skyline of Port of Spain from Gulf of Paria; National Academy for the Performing Arts, Independence Square, Eric Williams Plaza; MovieTowne, Port of Port of Spain Motto(s):  "We Gather Strength As We Go Along" Port of Spain Coordinates: 10°40′N 61°31′W  /  10.667°N 61.517°W  / 10.667; -61.517 Coordinates: 10°40′N 61°31′W  /  10.667°N 61.517°W  / 10.667; -61.517 Country   Trinidad and Tobago Jurisdiction City of Port of Spain Settled 1560 Incorporated (town) 1853 Incorporated (city) 1914 Government  • Mayor Joel Martinez  • Governing body City Corporation Area [1]  • City 12 km 2 (5 sq mi) Elevation [2] 66 m (217 ft) Population (2011) [1]  • City 37,074  • Rank 3rd  • Density 3,090/km 2 (8,000/sq mi)...
                                Read more