Get Except of multiple nested dictionaries using LINQ expression

Get Except of multiple nested dictionaries using LINQ expression

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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)

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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) {

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)) 

            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())));
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