logo
down
shadow

Get Except of multiple nested dictionaries using LINQ expression


Get Except of multiple nested dictionaries using LINQ expression

Content Index :

Get Except of multiple nested dictionaries using LINQ expression
Tag : chash , By : Praetoriansentry
Date : September 14 2020, 08:00 AM

fixed the issue. Will look into that further I want to get different of n numbers of dictionaries using a lambda expression: , You need some Linq methods:
var result = d.SelectMany(d => d.Value).GroupBy(c => c.Key)
              .Where(c => c.Count() == 1).ToDictionary(t => t.Key, t => t.Select(c => c.Value)
              .FirstOrDefault()).ToList();

Comments
No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

Querying Nested Dictionaries using LINQ


Tag : .net , By : Blaise Roth
Date : March 29 2020, 07:55 AM
hope this fix your issue Sure. You didn't specify a language so I hope that C# is okay (I'm not fluent in VB.NET but I can help you if you need help translating):
var query = TerminalList.SelectMany(kvp => kvp.Value.TableCRCs.Values)
                        .GroupBy(info => new { info.TableID, info.CRC });

foreach (var result in query) {
    Console.WriteLine(
        String.Format(
            "{0}|{1:x}",
            result.Key.TableID,
            result.Key.CRC
        )
    );
}

Flattening nested dictionaries with LINQ


Tag : chash , By : yatil
Date : March 29 2020, 07:55 AM
Hope this helps So I have a dictionary of the form Dictionary> myObjects and I would like to flatten this to a List flattenedObjects as simply as possible. I tried to come up with a clever solution, but so far all I've gotten to work is a solution with two nested foreach -loops that iterate over all of the elements, but I suppose there should be a nicer way of accomplishing this with LINQ. , try this
List<Object> flattenedObjects = myObjects.Values.SelectMany(myObject => myObject.Values).ToList();

How to flatten nested dictionaries within Class using LINQ


Tag : chash , By : Vrki
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , The closest solution to what I was looking for is this thread How to flatten nested objects with linq expression , Too many SelectMany:
var t = new TData(); // your TData

var aa = t.data.SelectMany(x =>
        x.Value.innerData.Select(y => new
        {
            url = x.Key,
            disp = x.Value.disp,
            date = y.Key,
            count = y.Value.count,
            rank = y.Value.rank,
        }));

Using nested dictionaries and populate them with a linq query


Tag : chash , By : Frank Rotolo
Date : March 29 2020, 07:55 AM
this one helps. The data model is like this: , An untested code, but should work for you.
private void InitializeDctionary(int typeId, IList < Game > gameInformations, IList < UserInfo > userInformations) 
{
    if (!_scoreDictionary.ContainsKey(typeId)) 
    {
        lock(_scoreDictionaryLock) 
        {

            if (!_scoreDictionary.ContainsKey(typeId)) 
            {
                _scoreDictionary.Add(typeId, new Dictionary < int, Dictionary < string, int >> ));
            }

            foreach(var gameInformation in gameInformations) 
            {
                var orderdUsers = userInformations.Where(s => s.GameId == gameInformation.Id)
                    .OrderByDescending(s => s.Score)
                    .Select((value, index) =>
                        new { value, index //this is the user rank
                        })
                    .Select(p =>new {p.value.UserName,p.index})
                    .Select(p => new KeyValuePair < string, int > (p.UserName, p.index));

                if (!_scoreDictionary[typeId].ContainsKey(gameInformation.Id))
                    _scoreDictionary[typeId].Add(gameInformation.Id, new Dictionary < string, int > ());

                _scoreDictionary[typeId][gameInformation.Id] = orderdUsers.ToDictionary(x => x.Key, x => x.Value);
            }
        }
    }
}

Linq Expression with multiple nested properties


Tag : chash , By : paolodm
Date : March 29 2020, 07:55 AM
it fixes the issue In this particular case there is no need to build dynamic expression predicate. The && can be achieved by chaining multiple Where, and || by putting the values into IEnumerable and using Enumerable.Contains.
For single name / values filter it would be something like this:
var name = "anId".ToLower();
var values = new List<string> { "10", "20" }.Select(v => v.ToLower());
query = query.Where(p => p.ParentField.Any(
    pf => pf.Field.Name == name && values.Contains(pf.Value.ToLower())));
var filters = new Dictionary<string, List<string>>
{
    { "anId", new List<string> { "10", "20" } },
    { "anotherId", new List<string> { "50", "60" } },
};

foreach (var entry in filters)
{
    var name = entry.Key.ToLower();
    var values = entry.Value.Select(v => v.ToLower());
    query = query.Where(p => p.ParentField.Any(
        pf => pf.Field.Name == name && values.Contains(pf.Value.ToLower())));
}
Related Posts Related QUESTIONS :
  • Trying to make thousands of database calls simultaneously - they stack instead of running concurently
  • run mstest from cmd using testcontainer
  • How to make M:N (many-to-many) relationship where both M and N are the same entities?
  • Consume COM DLL from multiple clients
  • Convert json string response representing UCHAR array to Byte array
  • Why does this LinqPad program produce different results on the second run?
  • ServiceStack how to use MaxLoginAttempts feature
  • What does "late-bound access to the destination object" mean?
  • How to load appsettings.json inside a Static class based on deploy environment so that I can use in other class librarie
  • dynamically add images to view
  • Are static extension methods on User object safe?
  • Process thousands of database calls simultaneously
  • Trying to decrypt a string with public key(not private) using bouncycastle in .net
  • How to retrieve the name of an usb device
  • Query many-to-many related data using Entity Framework Core
  • ASP.NET MVC : how to find the view from a controller?
  • Inconsistent behaviour using Entity Framework for ASP.NET MVC app vs windows service
  • AutoFixture Customize vs Build
  • How to change textbox location at the click of a mouse in live mode?
  • How can I deserialize a XML file without defining the parent node?
  • asp.net core how decrease class coupling
  • ASP.NET Core Razor Pages Routing With parameters
  • String Escaping With $ Interpolation and @ Encoding
  • ConfigurationManager in ASP.NET WebAPI tested with HttpServer
  • Top down shooting in Unity 2D don't work as I want it to
  • Use own redirectUri when the Authentication expires
  • Using "foreach" in string array c#
  • "Object reference not set to an instance of an object" for create multiply models on one view
  • Get data passed trought pushAsync
  • Selector expression dynamic on IQueryable
  • Logut with SignInManager not calling method
  • Exit event handler with MessageBox OK button
  • Can not load view from Custom Renderer Xamarin Forms
  • Looking for a .Net ORM
  • Cost of SortedDictionary.Count
  • All possible combinations of n items selected randomly from a set of x items (algorithm)
  • Displaying process percentage on DOS screen
  • C# Importing Large Volume of Data from CSV to Database
  • c# control location precision
  • Printing to Zebra printer gives faint and blurry images
  • How to avoid stepping into dll code file?
  • Programmaticaly prevent Vista desktop search (WDS) from indexing pst files placed on mapped network drives
  • Is there anyway to reduce IsolatedStorage capacity in Silverlight?
  • C#: How to print a unicode string to console?
  • Frequency Table with Random Values
  • My Visual Studio 2008 web application keeps throwing a .Net error when I first run it, but refreshing fixes it
  • TCP Connection Creation and Closing Event Hooking
  • Find changed properties of a class
  • C#: Object with custom marshaller not containing data after PInvoke call
  • Version Control System with API. Need to get metrics
  • Performance comparison of Dictionaries
  • How to get process name and title of the top window on Windows / C#
  • How to save the ListView contents to a text file?
  • Why not .NET-style delegates rather than closures in Java?
  • Get CLSID by PIA interface Type
  • Visual Studio 2008 C# - Recover solution from application manifest possible?
  • Is a good practice to initialize private data members from within ctor by calling the associated properties instead of t
  • Inserting into a bitstream
  • How do you write byte[] array using log4.net
  • Clickonce + .NET client profile 4 framework + offline
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com