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Seq.partition

A partition function on sequences, like List.partition and Array.partition, but yields elements in either partition on demand. Suitable as an extension to Seq.

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let partition condition values =     
    let pairs = seq {
        for i in values do
            if condition i then
                yield Some(i), None
            else
                yield None, Some(i) }

    pairs |> Seq.choose (fst>>id), pairs |> Seq.choose (snd>>id)
val partition : condition:('a -> bool) -> values:seq<'a> -> seq<'a> * seq<'a>

Full name: Script.partition
val condition : ('a -> bool)
val values : seq<'a>
val pairs : seq<'a option * 'a option>
Multiple items
val seq : sequence:seq<'T> -> seq<'T>

Full name: Microsoft.FSharp.Core.Operators.seq

--------------------
type seq<'T> = System.Collections.Generic.IEnumerable<'T>

Full name: Microsoft.FSharp.Collections.seq<_>
val i : 'a
union case Option.Some: Value: 'T -> Option<'T>
union case Option.None: Option<'T>
module Seq

from Microsoft.FSharp.Collections
val choose : chooser:('T -> 'U option) -> source:seq<'T> -> seq<'U>

Full name: Microsoft.FSharp.Collections.Seq.choose
val fst : tuple:('T1 * 'T2) -> 'T1

Full name: Microsoft.FSharp.Core.Operators.fst
val id : x:'T -> 'T

Full name: Microsoft.FSharp.Core.Operators.id
val snd : tuple:('T1 * 'T2) -> 'T2

Full name: Microsoft.FSharp.Core.Operators.snd
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More information

Link:http://fssnip.net/4K
Posted:12 years ago
Author:Stephen Swensen
Tags: seq

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