CODEWITHSUNDEEP
c#linq
TVOHM
TVOHM

Reputation: 2742

How to output a list of integers constructed from a single index from a list of lists using LINQ?

I have a list of lists that contain some numbers. I wish to construct an output list of the second index element in each of these lists. I am able to achieve this using a normal loop, but was wondering how it would be possible to achieve the same thing using LINQ?

My current example:

List<int> output = new List<int>();
foreach (List<int> list in Data)
    output.Add(list[2]);

Upvotes: 1

Views: 58

Answers (2)

CodingIntrigue
CodingIntrigue

Reputation: 78535

You can use .Select. I would also put a check in to ensure the number expected actually exists:

var results = Data.Where(d => d.Count > 2).Select(d => d.list[2]);

Upvotes: 1

usr
usr

Reputation: 171178

var output = Data.Select(list => list[2]).ToList();

This is a direct translation. I think it is much preferable to the manually written loop because it is less redundant and composes well.

Upvotes: 4

Related Questions