C#: finding instances of a string within a string

Question

Suppose I had the string \"1 AND 2 AND 3 OR 4\", and want to create an array of strings that contains all substrings \"AND\" or \"OR\", in order, found within the string.

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Answer 1

Here's a goofy way that I came up with:

string rule = "1 AND 2 AND 3 OR 4";
List andsOrs = new List();
string[] split = rule.Split();
for (int i = 0; i < split.Length; i++)
{
   if (split[i] == "AND" || split[i] == "OR")
   {
       andsOrs.Add(split[i]);
   }
}
string[] conditions = andsOrs.ToArray();
return conditions;