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c#stringsplit
stackuser
stackuser

Reputation: 198

Split the string after a word

I want to split a string after a word, not after the character. Example string:

 A-quick-brown-fox-jumps-over-the-lazy-dog

I want to split the string after "jumps-" can I use the stringname.Split("jumps-") function? I want the following output:

 over-the-lazy-dog.

Upvotes: 3

Views: 15108

Answers (4)

CookedCthulhu
CookedCthulhu

Reputation: 787

You could extend the Split() method. In fact, I did this a few months ago. Probably not the prettiest code but it gets the job done. This method splits at every jumps-, not just at the first one.

public static class StringExtensions
{
    public static string[] Split(this String Source, string Separator)
    {
        if (String.IsNullOrEmpty(Source))
            throw new Exception("Source string is null or empty!");
        if (String.IsNullOrEmpty(Separator))
            throw new Exception("Separator string is null or empty!");


        char[] _separator = Separator.ToArray();
        int LastMatch = 0;
        List<string> Result = new List<string>();


        Func<char[], char[], bool> Matches = (source1, source2) =>
        {
            for (int i = 0; i < source1.Length; i++)
            {
                if (source1[i] != source2[i])
                    return false;
            }
            return true;
        };


        for (int i = 0; _separator.Length + i < Source.Length; i++)
        {
            if (Matches(_separator.ToArray(), Source.Substring(i, _separator.Length).ToArray()))
            {
                Result.Add(Source.Substring(LastMatch, i - LastMatch));
                LastMatch = i + _separator.Length;
            }
        }

        Result.Add(Source.Substring(LastMatch, Source.Length - LastMatch));
        return Result.ToArray();
    }
}

Upvotes: 0

Slai
Slai

Reputation: 22866

I usually use extension methods:

public static string join(this string[] strings, string delimiter) { return string.Join(delimiter, strings); }

public static string[] splitR(this string str, params string[] delimiters) { return str.Split(delimiters, StringSplitOptions.RemoveEmptyEntries); }
//public static string[] splitL(this string str, string delimiter = " ", int limit = -1) { return vb.Strings.Split(str, delimiter, limit); }

public static string before(this string str, string delimiter) { int i = (str ?? "").    IndexOf(delimiter ?? ""); return i < 0 ? str : str.Remove   (i                   ); }  // or return str.splitR(delimiter).First();
public static string after (this string str, string delimiter) { int i = (str ?? "").LastIndexOf(delimiter ?? ""); return i < 0 ? str : str.Substring(i + delimiter.Length); }  // or return str.splitR(delimiter).Last();

sample use:

stringname.after("jumps-").splitR("-"); // splitR removes empty entries

Upvotes: 0

Dmitrii Bychenko
Dmitrii Bychenko

Reputation: 186668

I suggest using IndexOf and Substring since you actually want a suffix ("String after word"), not a split:

  string source = "A-quick-brown-fox-jumps-over-the-lazy-dog";
  string split = "jumps-";

  // over-the-lazy-dog
  string result = source.Substring(source.IndexOf(split) + split.Length);

Upvotes: 13

ThePerplexedOne
ThePerplexedOne

Reputation: 2950

    var theString = "A-quick-brown-fox-jumps-over-the-lazy-dog.";
    var afterJumps = theString.Split(new[] { "jumps-" }, StringSplitOptions.None)[1]; //Index 0 would be what is before 'jumps-', index 1 is after.

Upvotes: 1

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