regex split with exceptions

Question

This is an extension to this SO question. This question considers two different enclosing characters, in contrast to the original question.

I would like to split by (white)spaces of any number but ignore everything between <> AND "". So this string:

string Line = "1  2  <1  2> \"hello world\"   3";

Should result in this:

1, 2, <1 2>, \"hello world\", 3

If you're ignoring anything between <> and "" shouldn't the result be 1, 2, <1 2>, \"hello world\", 3 (note the 2 whitespaces between <1 and 2>) — t3hn00b
– t3hn00b, Commented Dec 14, 2012 at 14:07
The number of whitespaces should not matter and nothing should be split if it is enclosed by "" or <>. — cs0815
– cs0815, Commented Dec 14, 2012 at 14:11
@csetzkorn how the heck is that not a duplicate? Because they used square brackets instead of quotes? — Maarten Bodewes
– Maarten Bodewes, Commented Dec 14, 2012 at 14:20
Yes, the 'answer' which you may refer to uses [. My original question asks explicitly about ONE exception rather than 2 as in THIS question. — cs0815
– cs0815, Commented Dec 14, 2012 at 14:26

L.B · Accepted Answer · 2012-12-14 14:33:11Z

3

Instead of Split, I'll use Matches

string Line = "1  2  <1  2> \"hello world\"   3";
var parts = Regex.Matches(Line, @"[<\""]{1}[\w \d]+?[>\""]{1}|[\w\d]+")
                 .Cast<Match>()
                 .Select(m=>m.Value)
                 .ToArray();

PS: This would also match "abc def>. But I ignored it to make the regex shorter

edited Dec 14, 2012 at 14:33

answered Dec 14, 2012 at 14:24

L.B

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1 Comment

cs0815 Over a year ago

Excellent, however it does not seem to work for "" (e.g. "" 1 2 -> "",1,2)

cs0815 · Accepted Answer · 2012-12-17 16:01:00Z

This is what I came up with so far:

public static string[] GetSplitStrings(string input)
{
    IList<string> splitStrings = new List<string>();
    var counter = 0;

    var sb = new StringBuilder();
    var inLessGreater = false; // sometimes <> can contain "
    foreach (var character in input)
    {
    if (character.Equals('<'))
    {
        inLessGreater = true;
        counter++;
    }

    if (character.Equals('>'))
    {
        inLessGreater = false;
        counter++;
    }

    if (character.Equals('"') && !inLessGreater)
    {
        counter++;
    }

    if ((character.Equals(' ') && counter == 0) || (counter == 2))
    {
        if (sb.ToString().Equals("") == false)
        {
        if (character.Equals('"') || character.Equals('>'))
        {
            sb.Append(character);
        }
        splitStrings.Add(sb.ToString());
        }
        sb.Clear();
        counter = 0;
    }
    else
    {
        sb.Append(character);
    }
    }

    return splitStrings.ToArray();
}

Would prefer a neat regex solution.

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