MatchCollection to List(Of String)

Question

Hello

Instead of:

For Each Match As Match In MatchCollection
    StringList.Add(Match.Value)
Next

Is there a shorter and faster way to add all element values in MatchCollection to the StringList which is list of string?

Thanks.

Answer 1

you can use linq for shorter source code, but it will not be faster. if there are larger number of matches adding code may make it faster.

var size = MatchCollection.Count;
if (size < 20) // use perf timing to optimize
{
   foreach (var match in MatchCollection) StringList.Add(Match.Value);
}
else
{
   var list = new List<string>(size); // preallocate
   foreach (var match in MatchCollection) list.Add(Match.Value);
   StringList.AddRange(list); // uses preallocation
}

note: compared to the performance of RegEx, this is probably not worth the effort. also be sure you are using precompiled regex expressions.