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Count the number of tuples in an array of tuples.
f#

Dear All:
I want to count the number of tuples in an array of tuples.
let aTuple= (0.0, 0, 0L)
let arrayTuples = [|(1.0, 1, 1L);(2.0, 2, 2L);(0.0, 0, 0L);(0.0, 0, 0L)|]
I want to have a function to return the number of tuples in the
array of tuples. For the above example:
countTuples = 2
Please show me the code.
Thanks,

.

One easy way is to filter the ones equalling the target value (via Seq.filter) and then count (via Seq.length) the resulting sequence:

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let aTuple= (0.0, 0, 0L)
let arrayTuples = [|(1.0, 1, 1L);(2.0, 2, 2L);(0.0, 0, 0L);(0.0, 0, 0L)|]
arrayTuples |> Seq.filter (fun t -> t = aTuple) |> Seq.length |> printfn "%d"

[link:msdn.microsoft.com]

By on 1/9/2010 4:00 PM ()

Hello, Brianmcn:
Thank you very much, your code works.
Thanks and have a nice day!

By on 1/10/2010 12:51 AM ()

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