Question

I got a string that contains:

"("  ")"  "&&"  "||"

and numbers (0 to 99999).

I want to get a string and return a list like this:

get:

"(54&&1)||15"

return new List<string>(){
"(",
"54",
"&&",
"1",
")",
"||",
"15"}

Answer 1

I suspect a regex would do the trick here. Something like:

string text = "(54&&1)||15";
Regex pattern = new Regex(@"\(|\)|&&|\|\||\d+");
Match match = pattern.Match(text);
while (match.Success)
{
    Console.WriteLine(match.Value);
    match = match.NextMatch();
}

The tricky bit in the above is that a lot of stuff needs escaping. The | is the alternation operator, so this is “open bracket or close bracket or && or || or at least one digit”.