Question

I have an array of doubles and a threshold value.
I would like to select the first index in my array where the value at the index is larger than the threshold.

How the do I accomplish that in LINQ?

I got it to work with:

var n = acc_avg.Select((val, index) => new {Val = val, Index = index})
               .Where(l => l.Val > threshold)
               .First()
               .Index

But is there is better way?

Answer 1

You can use Array.FindIndex:

var n = Array.FindIndex(acc_avg, x => x > threshold);