Regex .NET match everything until first space + letter is found

Question

I have:

01 - Radio N Am 2007 
186508980X -16-17 - Horns and Bones
(ab)normal - constitutions

Goal:

Radio N Am 2007 
Horns and Bones
constitutions

I tried with

^(?:(?!(?:\S*[\s[a-z][A-Z])).)+

but the output is:

 - Radio N Am 2007
 - Horns and Bones

Please help me with a correct regex to achieve the goal.

Answer 1

Instead of trying to replace, match what you want with:

(?<= )[A-Za-z].*

demo

Answer 2

Search for:

^.*?- (?=[A-Za-z])

and replace by empty string.

RegEx Demo

Answer 3

If you are looking for a regex solution that will only match the substrings after the last - , you can just use

-\s*([^-]*$)

See demo

If there must be a letter after the hyphen , you may use -\\s*(\\p{L}[^-]*$) . The \\p{L} construct will match any Unicode letter.

C# IDEONE demo :

var lines = new string[] {"01 - Radio N Am 2007", 
"186508980X -16-17 - Horns and Bones",
"(ab)normal - constitutions"};
foreach (string s in lines) 
{
    var matches = Regex.Matches(s, @"-\s*([^-]*$)");
    foreach (Match m in matches)
        Console.WriteLine(m.Groups[1].Value);
}

But you can also use a non-regex approach if you need to get substrings after the last hyphen:

Console.WriteLine(s.Substring(s.LastIndexOf("-") + 1).Trim());

See another demo