Split string by character count and store in string array

Question

I have a string like this

abcdefghij

And I wast to split this string by 3 characters each. My desired output will be a string array containing this

abc
def
ghi
j

Is is possible using string.Split() method?

Answer 1

This code will group the chars in groups of 3, and convert each group to a string.

string s = "abcdefghij";

var split = s.Select((c, index) => new {c, index})
    .GroupBy(x => x.index/3)
    .Select(group => group.Select(elem => elem.c))
    .Select(chars => new string(chars.ToArray()));

foreach (var str in split)
    Console.WriteLine(str);

prints

abc
def
ghi
j

Fiddle: http://dotnetfiddle.net/1PgFu7

Answer 2

Using a bit of Linq

static IEnumerable<string> Split(string str)
{
    while (str.Length > 0)
    {
        yield return new string(str.Take(3).ToArray());
        str = new string(str.Skip(3).ToArray());
    }
}

Here is the Demo

Answer 3

IEnumerable<string> GetNextChars ( string str, int iterateCount )
{
    var words = new List<string>();

    for ( int i = 0; i < str.Length; i += iterateCount )
        if ( str.Length - i >= iterateCount ) words.Add(str.Substring(i, iterateCount));
        else words.Add(str.Substring(i, str.Length - i));

    return words;
}

This will avoid ArgumentOutOfRangeException in @Sajeetharan's answer.

Edit: Sorry for completely dumb previous answer of mine :) this is supposed to do the trick.

Answer 4

IEnumerable<string> Split(string str) {
    for (int i = 0; i < str.Length; i += 3)
        yield return str.Substring(i, Math.Min(str.Length - i, 3));
}

Answer 5

No, I don't believe it is possible using just string.Split(). But it is simple enough to create your own function...

string[] MySplit(string input)
{
   List<string> results = new List<string>();
   int count = 0;
   string temp = "";

   foreach(char c in input)
   {
      temp += c;
      count++;
      if(count == 3)
      {
         result.Add(temp);
         temp = "";
         count = 0;
      }
   }

   if(temp != "")
      result.Add(temp);

   return result.ToArray();
}