CODEWITHSUNDEEP
c#linq
hackp0int
hackp0int

Reputation: 4161

How to get ranged by index with LINQ allow to take previous or next items?

For example I want to take next 3 items I do this

private IEnumerable<T> IndexRange<T>(IList<T> source, int start, int end)
{
     return source.Skip(start).Take(end);
}

But I need to be able to take also previous 3 items if I need it. How that would be possible? For example: IndexRange(source, 15, 12);

Upvotes: 0

Views: 49

Answers (1)

jmcilhinney
jmcilhinney

Reputation: 54487

Your code is wrong. It should be:

return source.Skip(start).Take(end - start + 1);

To do what you're asking it could be:

return source.Skip(Math.Min(start, end)).Take(Math.Abs(end - start) + 1);

Note that my code assumes that both start and end are inclusive.

Upvotes: 3

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