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Counting lines in a string

By , 11 Jan 2012

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9 Jan 2012  
Grasshopper.iics
 
Can't we have something as below?int n=(s.Split(new char[]{'\n'})).Length;where n is the number of lines?
10 Jan 2012  
Luc Pattyn
 
You shouldn't be working with huge strings at all.If this represents a file's content, read it using File.ReadAllLines() and take the array's Length.Otherwise, count the lines while you collect the data, not afterwards.Dealing with a huge string isn't doing the caches any favors.And if...
17 Jan 2012  
Jon Bellamy
 
Again, going with other people's comments about memory, how about using a Streamreader? (I haven't tested the timings (or code) but from memory..This should be fast (and memory efficient)...at least in my experience.StreamReader sr = new StreamReader("Put file here");Int32 cnt =...
9 Jan 2012  
akemper
 
I've compared your favorite with seven alternatives:static long LinesCount(string s) { long count = 0; int position = 0; while ((position = s.IndexOf('\n', position)) != -1) { count++; position++; // Skip this occurance! } ...
18 Jun 2012  
OriginalGriff 8 alternatives  
 
It seems like an obvious requirement, but the .NET framework will not count occurrences of a character in a string. It's easy to do, but which way is the quickest?
17 Jan 2012  
Greg Baryza
 
I had to do something like this in XSLT. If the string is not too long (for some definition of "too long"), you can replace all newlines with "" and then take the difference in the two string lengths.
17 Jan 2012  
Roman Shero
 
Hello! Great tip!What do you think about this extension method:public static class StringExtension{ public unsafe static long LineCount(this string s) { long lineCount = 1; fixed (char* pchar = s) { char* p = pchar; for (; *p...
28 Feb 2012  
Andreas Gieriet
 
Great analysis!I found out that Regex can be accelerated by a factor of about two.Instead of new Regex(@"\n", RegexOptions.Compiled|RegexOptions.Multiline);you can speed up by using:new Regex(@"^.*?$", RegexOptions.Compiled|RegexOptions.Multiline);But admittedly, nothing beats...

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George Swan
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