Extract delimited list from inside curly brackets

Question

I have string input from a file that looks like this, and I have created a regex that successfully extracts just this:

 addresses { 1.1.1.1;
  2.2.2.2;
  3.3.3.3;
 }

And there can be arbitrary whitespace on any line. I'd like to get a List<string> of just the address values:

s[0] = "1.1.1.1"
s[1] = "2.2.2.2"
etc...

Can anyone help me with the relevant C#? I'm at the limits of my regex skills.

It's not clear what is wrong with your code. Do you have some error? — Sergey Berezovskiy, Jan 06 '17 at 01:09
Take a look at this. http://stackoverflow.com/questions/4890789/regex-for-an-ip-address — , Jan 06 '17 at 01:09
what you have tried? anyway you could solve it with regex (again) and match the pattern `1.1.1.1` --> loooks like `(\d+.\d+.\d+.\d+);`.. — Bagus Tesa, Jan 06 '17 at 01:10

score 1 · Accepted Answer · answered Jan 06 '17 at 01:23

1

You need just get content of curly braces (either with regex or simply with IndexOf) and split it by ;

var input = @"addresses { 1.1.1.1; 2.2.2.2; 3.3.3.3; }";
var regex = new Regex(@"[^{]+{([^}]+)}", RegexOptions.Multiline);
var addresses = regex.Match(input).Groups[1].Value
    .Split(';')
    .Select(s => s.Trim())
    .Where(s => !String.IsNullOrWhiteSpace(s))
    .ToList();

answered Jan 06 '17 at 01:23

Sergey Berezovskiy

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1

Exactly the kind of elegant solution I was hoping to create. I had so much trouble with the proper syntax. Thanks! – Rocky Jan 06 '17 at 03:01

score 0 · Answer 2 · answered Jan 06 '17 at 01:38

There could be n Number of ways you can extract the values from the string. This could be one of them.

string input = @"addresses { 1.1.1.1; 2.2.2.2; 3.3.3.3; }";
string formattedInput = Regex.Replace(input, @"[A-Za-z*{}]", "");
List<string> InpList = formattedInput.Split(new char[] { ' ', ';' }, StringSplitOptions.RemoveEmptyEntries).ToList();

Extract delimited list from inside curly brackets

2 Answers2