CODEWITHSUNDEEP
c#.netlinq
Darthg8r
Darthg8r

Reputation: 12675

Using Where on a list previously sorted

I have a List<> that I've previously sorted by one of the fields on the object. If I perform a Where() on the list, am I safe to assume that the results of the Where will also be sorted?

// Sorted by salary, greatest to smallest.
List<Players> players = _playerRepo.GetAll().OrderByDescending(x => x.Salary).ToList();

// Is this list safe to assume that the players with smith as last name are sorted by salary as well?
List<Players> filteredPlayers = players.Where(x => x.LastName == "Smith").ToList();

Upvotes: 2

Views: 66

Answers (2)

Cᴏʀʏ
Cᴏʀʏ

Reputation: 107536

Yes, Where will not change the order of a previously ordered list, it will only filter it.

Also, the ordering operations are stable, so equal values will stay in their original order.

Upvotes: 2

Athari
Athari

Reputation: 34295

Yes. LINQ queries, in general, keep the order of elements.

Hint: don't call ToList if you want to filter the result further. You should peform query on the database, not on the client, if possible.

Upvotes: 3

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