Split string and keep delimiter in sequence

Question

Is there a clever way to do the following string manipulation in C#?

I have any kind of string and im looking for a specified delimiter. The code should divide the string in words before and after delimiter and also include the delimiter. The delimiter could be several times in a row and also could be in the start or the end.

// PSEUDO CODE
string = "Hello****wide****world";
delimiter = "****";

// result should be a list<string> like
{"Hello","****","wide","****","world"}

@Sham Join will result back to a string, not a collection... — Zohar Peled, Sep 24 '18 at 07:51
no it doesnt! Its possible to split on a string. Still problem is that i need to keep the delimiter! — Daarwin, Sep 24 '18 at 07:51
try this.. https://stackoverflow.com/questions/521146/c-sharp-split-string-but-keep-split-chars-separators — sicKo, Sep 24 '18 at 07:56
The question identified as a duplicate is not a duplicate. There is a different output required. — , Sep 24 '18 at 08:28
Since I already made the code, there are two other parsing methods: https://pastebin.com/WKmjPNdz - you can configure the output; since you did not specify the behaviour for some cases... — Julo, Sep 24 '18 at 08:36

score 1 · Answer 1 · answered Sep 24 '18 at 08:03

1

You can try to use Regex and the pattern is (\*{4}).

string data = "Hello****wide****world";

string[] words = Regex.Split(data, @"(\*{4})");
List<string> result = words.ToList();

NOTE

* is a keyword in regex string, so you need to use \ to escape it.

c# online

answered Sep 24 '18 at 08:03

D-Shih

44,943
6
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Does this keep the pattern as indexes in the list? – Daarwin Sep 24 '18 at 10:53
I think is yes. you can see my c# demo – D-Shih Sep 24 '18 at 10:54

score 0 · Answer 2 · answered Sep 24 '18 at 07:52

0

i'll say split the string with the delimiter, then when creating the result add the delimiter after each item in the array.

string fullWord = "Hello****wide****world";
string delimiter = "****";

var listOfWords = fullWord.Split(delimiter);
List<string> result = new List<string>();

foreach(var item in listOfWords){
  result.Add(item);
  result.Add(delimiter);
}

return result;

answered Sep 24 '18 at 07:52

wale A

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7

How do you know if the sequence should also start or end with the delimiter ? Also, the delimiter can be twice in a row. – Daarwin Sep 24 '18 at 07:54
With this way you add one delimiter at the end oh the file, that was not there _(in the source)_.. – Julo Sep 24 '18 at 07:54
Julo. It could or not be there in the end. Or the beginning. – Daarwin Sep 24 '18 at 07:56
@Lautaro: have you tested the code? It will always add an delimiter at the end. – Julo Sep 24 '18 at 07:57
Julo. I agree with you. It won’t do. – Daarwin Sep 24 '18 at 07:57

score 0 · Answer 3 · answered Sep 24 '18 at 07:58

You can do it like this. In the end, you can iterate over the result.

string input = "Hello****wide****world";
string delimiter = "****";

var listOfWords = input.Split(new string[] { delimiter }, StringSplitOptions.None);
List<string> result = new List<string>();

foreach (var item in listOfWords)
{
    if (!item.Equals(listOfWords.Last()))
    {
        result.Add(item);
        result.Add(delimiter);
    }
    else
    {
        result.Add(item);
    }
}

score 0 · Answer 4 · answered Sep 24 '18 at 07:59

0

untested

string[] words = Regex.Split(originalString, @"(?=****)");
List<string> wordsLst = words.ToList();

answered Sep 24 '18 at 07:59

sicKo

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score 0 · Answer 5 · answered Sep 24 '18 at 08:00

0

User Regex to do it :

string input = "Hello****wide****world";
string pattern = "(****)";

string[] substrings = Regex.Split(input, pattern);

answered Sep 24 '18 at 08:00

Cornelis

1,065
8
23

score 0 · Answer 6 · answered Sep 24 '18 at 08:04

string fullWord = "Hello****wide****world";
string delimiter = "****";

var listOfWords = fullWord.Split(delimiter);
StringBuilder result = new StringBuilder("");
result.Append("{");
foreach(var item in listOfWords){
  if (!item.Equals(listOfWords.Last()))
  {
       result.Append($"\"{item}\",\"{delimiter}\",");
  }
  else
  {
       result.Append($"\"{item}\"");
  }
}
result.Append("}");
var stringResult=result.ToString();

Split string and keep delimiter in sequence

6 Answers6