How can I strip punctuation from a string?

Question

For the hope-to-have-an-answer-in-30-seconds part of this question, I\'m specifically looking for C#

But in the general case, what\'s the best way to strip punctuati

Answer 1

$newstr=ereg_replace("[[:punct:]]",'',$oldstr);

Answer 2

new string(myCharCollection.Where(c => !char.IsPunctuation(c)).ToArray());

Answer 3

I faced the same issue and was concerned about the performance impact of calling the IsPunctuation for every single check.

I found this post: http://www.dotnetperls.com/char-ispunctuation.

Accross the lines: char.IsPunctuation also handles Unicode on top of ASCII. The method matches a bunch of characters including control characters. By definiton, this method is heavy and expensive.

The bottom line is that I finally didn't go for it because of its performance impact on my ETL process.

I went for the custom implemetation of dotnetperls.

And jut FYI, here is some code deduced from the previous answers to get the list of all punctuation characters (excluding the control ones):

var punctuationCharacters = new List<char>();

        for (int i = char.MinValue; i <= char.MaxValue; i++)
        {
            var character = Convert.ToChar(i);

            if (char.IsPunctuation(character) && !char.IsControl(character))
            {
                punctuationCharacters.Add(character);
            }
        }

        var commaSeparatedValueOfPunctuationCharacters = string.Join("", punctuationCharacters);

        Console.WriteLine(commaSeparatedValueOfPunctuationCharacters);

Cheers, Andrew