Question

its me. i got the following code:

foreach (var str in usedCSS) { 
    if (CSS.Any(c => c.IndexOf(str)>0))        
        Response.Write(str + "<br />"); 
    else        
        Response.Write("Could not find: " + str + "<br />"); 
}

usedCSS = List<string>

CSS = List<string>

but, i need it the other way around…

i want the var str in usedCSS to be var str in CSS

usedCSS contains strings of only the css names e.g: .header

CSS contains string of the actual css e.g: .header {font-size:14px;}

basicly, what i need is to print out the actuall CSS that is used.
The code i currently have does the exact opposite, it returns only the css names,
not the actuall css.

Answer 1

If I understand what it is you’re trying to do correctly, you could do this. FirstOrDefault() finds the first occurrence of a predicate match and returns it, or null (default for type string) if not found. Then all we need is the StartsWith() string method to match each item in CSS prefix-wise with the str in question.

        foreach (var str in usedCSS)
        {
            // FirstOrDefault finds first match or returns default (null for string) if not found.
            var match = CSS.FirstOrDefault(s => s.StartsWith(str));

            if (match != null)

                // get the match.  
                Response.Write(match + "<br />");
            }
            else
            {
                Response.Write("Could not find: " + str + "<br />");
            }
        }

p.s. The above works if you only expect one or no matches, if you can have multiple matches, and want them all:

foreach (var str in usedCSS)
{
    foreach(var match in CSS.Where(s => s.StartsWith(str)))
    {
        // get the match.  
        Response.Write(match + "<br />");
    }
}