Array.reduce<'T> Function (F#)
Applies a function to each element of the array, threading an accumulator argument through the computation. If the input function is f and the elements are i0...iN, then computes f (... (f i0 i1)...) iN. Raises ArgumentException if the array has size zero.
Namespace/Module Path: Microsoft.FSharp.Collections.Array
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
Array.reduce : ('T -> 'T -> 'T) -> 'T [] -> 'T
// Usage:
Array.reduce reduction array
Parameters
reduction
Type: 'T -> 'T -> 'TThe function to reduce a pair of elements to a single element.
array
Type: 'T []The input array.
Exceptions
Exception |
Condition |
|---|---|
Thrown when the input array is empty. |
Return Value
The final result of the reductions.
Remarks
This function is named Reduce in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.
Example
The following example demonstrates the use of Array.reduce.
let names = [| "A"; "man"; "landed"; "on"; "the"; "moon" |]
let sentence = names |> Array.reduce (fun acc item -> acc + " " + item)
printfn "sentence = %s" sentence
sentence = A man landed on the moon
Platforms
Windows 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2
Version Information
F# Runtime
Supported in: 2.0, 4.0
Silverlight
Supported in: 3