Capture piped value (Noob Question)

Question

I need to capture a value and don't know how to do it.

myData |> Seq.count

How do I capture that count? I want to be able to do an if on it or whatever.

Thanks.

cfern · Accepted Answer · 2011-07-08 07:34:17Z

4

I think you'll want Seq.length to determine the length of a sequence:

let n = {1..42} |> Seq.length
if n > 10 then printf "Too many numbers!"

answered Jul 8, 2011 at 7:34

cfern

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Daniel · Accepted Answer · 2011-07-08 14:24:02Z

3

Since some collections (e.g., array) have a Length property which can be used to efficiently check for empty, I thought I'd mention, if that's what you're going for, Seq.isEmpty is what you want. Seq.length is O(n).

answered Jul 8, 2011 at 14:24

Daniel

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