How to select multiple items from list based of index with Linq?

Question

lets say I have an array like this:

var items = [
 0: {},
 1: {},
 2: {},
 3: {},
 4: {},
 5: {}
]

And I know which Items i want to handle since I have figured out their index:

List<int> myIndexes = new List<int> { 0, 3, 5};

I want to get items 0, 3, 5

How would I accomplish this with a LINQ query?

looking for something like:

var myNewItems = items.Something(myIndexes)

Dmitrii Bychenko · Accepted Answer · 2023-01-01 23:49:54Z

1

If I understand you right, you have a collection of indexes, say

List<int> myIndexes = new List<int> { 0, 3, 5 };

to get corresponging values from items we can query these myIndexes:

var myValues = myIndexes
  .Select(index => items[index])
  .ToList();

answered Jan 1, 2023 at 23:49

Dmitrii Bychenko

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1 Comment

ThunD3eR Over a year ago

This makes sense. I was approaching this from focusing on fetching from items first rather than doing it the other way arround and iterating from indexes. Thanks alot and cheers.

pm100 · Accepted Answer · 2023-01-01 23:47:36Z

0

try

  myIndexes.Select(i=>myNewItems[i]);

answered Jan 1, 2023 at 23:47

pm100

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