Determine if any property value is not null and matches value in another list-CodePudding

Let's say I have a List<string> that looks like this:

var lstStuff = new List<String>(){"test", "value", "other"};

I also have a Model Class that looks like this

public class Codes {
    public string Code     {get;set;}
    public string? HaveVal {get;set;}
}

In my C# method I have something like this. What I am trying to achieve is to return a TRUE or FALSE if any single item in lstStuff has a HaveVal in lstCode

public bool DoesAnyCodeHaveAValue
{
    var lstStuff = new List<String(){"Code1","Code2","Code3"};

    List<Code> lstCode = new List<Code>() {
                            new Code() {Code = "Code1", HaveVal=null},
                            new Code() {Code = "Code1", HaveVal="yes"},
                            new Code() {Code = "Code1", HaveVal="yes"}
                          };
 }

Here's my code to achieve this, but I was wondering if there is a LINQ way of doing this.

 var isVal = false;

 foreach (var val in lstStuff){
    if (!string.IsNullOrEmpty(lstCode.Where(x=>x.Code=val).Select(y=>y.HaveVal).ToString())){
       isVal=true;
    }
 }

 return isVal;

Is there a shorter way to do this, without needing to loop?

CodePudding user response：

You can use Any() twice::

bool isVal = lstCode.Any(c => lstStuff.Any(s => s == c.Code));

If you don't want null values you can filter them out too:

bool isVal = lstCode.Any(c => !string.IsNullOrEmpty(c.HaveVal) 
                                 && lstStuff.Any(s => s == c.Code));

Here's a demo