shortest way to get first char from every word in a string

Question

I want a shortest way to get 1st char of every word in a string in C#.

what I have done is:

string str = \"This is my style\";
string [] output = str         


        

Answer 1

Print first letter of each word in a string

string SampleText = "Stack Overflow Com";
string ShortName = "";
SystemName.Split(' ').ToList().ForEach(i => ShortName += i[0].ToString());  

Output:

SOC

Answer 2

I think your solution is perfectly fine, but if you want better performance you can try:

string str = "This is my style";
Console.Write(str[0]);
for(int i = 1; i < str.Length; i++)
{
    if(str[i-1] = " ")
        Console.Write(" " + str[i]);
}

You might get a lower constant factor with this code but it still runs in O(n). Also, I assume that there will never be more than one space in a row and it won't start with space.

If you want to write less code you can try:

str result = str.Split(" ").Select(y => y[0]).ToList();

Or something.

Answer 3

Regular expressions could be the answer:

  Regex.Matches(text, @"\b(\w{1})")
    .OfType<Match>()
    .Select(m => m.Groups[1].Value)
    .ToArray();

Answer 4

string str = "This is my style"; 
str.Split(' ').ToList().ForEach(i => Console.Write(i[0] + " "));

Answer 5

var firstChars = str.Split(' ').Select(s => s[0]);

If the performance is critical:

var firstChars = str.Where((ch, index) => ch != ' ' 
                       && (index == 0 || str[index - 1] == ' '));

The second solution is less readable, but loop the string once.