CODEWITHSUNDEEP
c#
Pojo
Pojo

Reputation: 1237

How to compare nested properties between lists

So, I'm basically creating a version control-like system. I have the following class Form:

public class Form
{
    public long Id {get; private set;}
    /* among other things */
}

Then, another class like so:

public class Conflict
{
    List<Form> localForms;
    List<Form> remoteForms;
    /* among other things */
}

and then a main class that maintains a List of Conflicts.

public class Main
{
    List<Conflict> conflicts;

    /*
     * more stuff...
    */

    public void AddFormConflict(List<Form> locals, List<Form> remotes)
    {
        ...what goes here?
    }
}

I want to make sure that when a new Conflict object is about to be added, it doesn't contain duplicate data; in other words, I want to compare Ids of the List<Form> locals argument with Ids contained by the localForms member of the conflicts list. And same for the remotes as well. Furthermore, I not only want to find out whether or not such a match exists, but I also want to get a reference to it.

Basically long story short, I want to compare the properties in a list of objects with corresponding properties in another similarly-structured list of objects... which are contained by another class which is in a list.

I'm pretty sure there's gotta be some relatively simple way to do something like this with linq in about 2-3 lines, right? I just can't for the life of me wrap my head around all the layers! Ugh. Help please?

Upvotes: 1

Views: 85

Answers (1)

Arghya C
Arghya C

Reputation: 10068

Making the properties public

public class Conflict
{
    public List<Form> localForms { get; set; }
    public List<Form> remoteForms { get; set; }
    /* among other things */
}

You can check for duplicates like this

public class Main
{
    List<Conflict> conflicts;

    public void AddFormConflict(List<Form> locals, List<Form> remotes)
    {
        if (conflicts.Any(c => c.localForms.Any(lf => locals.Any(lc => lf.Id == lc.Id))))
        {
            //duplicate found for localForms
        }
        //similarly check for remoteForms
    }
}

Upvotes: 1

Related Questions