Lazy.Create<'T> Extension Method (F#)

  • Article

Creates a lazy computation that evaluates to the result of the given function when forced.

Namespace/Module Path: Microsoft.FSharp.Control.LazyExtensions

Assembly: FSharp.Core (in FSharp.Core.dll)

// Signature:
type System.Lazy with
  member static Create : Lazy<'T>

// Usage:
lazy.Create (creator)

Parameters

  • creator
    Type: unit -> 'T

    The function to provide the value when needed.

Return Value

The created Lazy object.

Example

The following code illustrates the use of Create.

let lazyValue n = Lazy.Create (fun () ->
    let rec factorial n =
        match n with
        | 0 | 1 -> 1
        | n -> n * factorial (n - 1)
    factorial n)
let lazyVal = lazyValue 10
printfn "%d" (lazyVal.Force())

The output is the factorial of 10.

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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

Silverlight

Supported in: 3

See Also

Reference

Control.LazyExtensions Module (F#)

Lazy<T>

Lazy Computations (F#)