Quick challenge #2: how to truncate a string in C# and keep word boundaries (do not split a word in two)

[Q] How to truncate a string in C# with more than 10 characters and keep word boundaries (do not split a word in two)?

[Examples] "Good morning test." -> "Good morni..." (wrong), "Good morning..." (correct)

       

       [Answer]

private static string Truncate(string s)

        {

            return new string(s.Take(10).ToArray()) + new string(s.Skip(10).TakeWhile(c => !Char.IsWhiteSpace(c) && !Char.IsPunctuation(c)).ToArray()) + "...";

        }

We are assuming here that punctuation symbols and whitespaces are word boundaries. Therefore, the code takes 10 characters and, after that, it continues taking characters up to the first word boundary. This is a super simple implementation that hides practical problems, but it works for learning LINQ and C# :)

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