Use an anonymous method:

int iIndex = ListArticle.FindLastIndex(delegate (XmlNode node)
   { return TheSameYear(node, "a custom parameter"); }
);

Hi Sam,

sam schrieb:

What you can do is use a inner predicate class that stores your custom parameter, like:

List<XmlNode> ListArticle;
SameYearPredicate theSameYear = new SameYearPredicate("a custom parameter");
int iIndex = ListArticle.FindLastIndex(theSameYear.Eval);

...
class SameYearPredicate
{
  private string param;

  public SameYearPredicate(string param)
  {
     this.param = param;
  }

  public bool Eval(XmlNode n)
  {
      // use this.param here
      if(....)
         return true;
     else
       return false;
  }
}

Best wishes,

Marc.

Put the method in a class, add a private variable in the class, and send
the parameter when creating an instance of the class. The method can use
the local variable.

And please don't use the "if x then true else false" antipattern. ;)

public class YearComparer {

   private string _custom;

   public YearComparer(string custom) {
      _custom = custom;
   }

   public bool TheSameYear(XmlNode node) {
      return ( ...blahblah... _custom ...blahblah.... );
   }

}

YearComparer comparer = new YearComparer("a custom parameter");
int iIndex = ListArticle.FindLastIndex(comparer.TheSameYear);