Question

I wanna build a program to crawl some websites, check for the style.css file, open it, and with a Regex which is #([a-z]|[A-Z]|[0-9])([a-z]|[A-Z]|[0-9])([a-z]|[A-Z]|[0-9])([a-z]|[A-Z]|[0-9])([a-z]|[A-Z]|[0-9])([a-z]|[A-Z]|[0-9])(?=;) I want to get the top 5 colors of the style.css

If there are 200 colors in my regex result, I wanna get the top 5 meaning.

For example my regex will find this color #ffffff 100 times, which means this will be my first color.

The color #343434 will be found 98 times, this will be my second color.

And so on to get the top 5 colors from the style.css file.

Any ideas on how to implement this ?

I found this sort of example on here:

var l1 = new List<int>() { 1,2,3,4,5,2,2,2,4,4,4,1 };

        var g = l1.GroupBy( i => i );

        foreach( var grp in g )
        {
           Console.WriteLine( "{0} {1}", grp.Key, grp.Count() );
        }

But it’s not really what I’m looking for.

Any ideas are welcome.

Thanks in advance.

Answer 1

You can try something like:

var topMatches = Regex.Matches(stringToCheck, RegExPattern)
    .Cast<Match>()
    .GroupBy(m => m.Value)
    .Select(m => new{ Colour = m.Key, Count = m.Count() })
    .OrderByDescending(g => g.Count)
    .Take(5)
    .ToList();