CODEWITHSUNDEEP
c#linq
user3504028
user3504028

Reputation: 77

Calculate total count of int values in dictionary

I'm still finding my feet in the c# world and I've recently been looking at Linq. My question is:

I have a dictionary which holds a userID and a list of integer values (game scores). I was wondering if it would be possible to get the overall count for each user?

var scoreDictionary = new Dictionary<int, List<int>>();

Example, Key = 1234 Value = {23,25,35,13,57,32}

Upvotes: 2

Views: 904

Answers (5)

Sreejith
Sreejith

Reputation: 45

You can try the below code .Hope this will help . 

var scores = scoreDictionary.ToDictionary(x => x.Key, x => x.Value.Sum());

Upvotes: 0

Nikhil Agrawal
Nikhil Agrawal

Reputation: 48568

how about

foreach(var item in scoreDictionary)
{
    Console.WriteLine("User " + item.Key " + has a score of " + item.Value.Sum());
}

This would print like this

User 1234 has a score of 185
User 5678 has a score of 252

enter image description here

Upvotes: 0

user2309689
user2309689

Reputation: 3

List has a count property, so you can get the number of scores for a given player (whose id is stored in 'playerId') this way:

int playerScoreCount = scoreDictionary[playerId].Count;

Upvotes: 0

Ani
Ani

Reputation: 113412

Assuming you want a lookup table from the user-id to

...the number of scores for the user:

scoreDictionary.ToDictionary(pair => pair.Key, pair => pair.Value.Count)

...the sum of scores for the user:

scoreDictionary.ToDictionary(pair => pair.Key, pair => pair.Value.Sum())

By the way, you may also consider using the ILookup<,> interface to represent the multi-map you have there instead of a Dictionary<,> with a collection as TValue.

Upvotes: 2

Grant Winney
Grant Winney

Reputation: 66449

You can use the Sum method.

Not sure what you want to do with each total. This will output each user's total score:

foreach (var user in scoreDictionary)
{
    Console.WriteLine(
        "User {0} has a total score of {1}", user.Key, user.Value.Sum());
}

You could also create a new dictionary to store the values in:

var scores = scoreDictionary.ToDictionary(x => x.Key, x => x.Value.Sum());

Upvotes: 0

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