Array.isEmpty<'T> Function (F#)

Tests whether an array is empty.

Namespace/Module Path: Microsoft.FSharp.Collections.Array

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

// Signature:
Array.isEmpty : 'T [] -> bool

// Usage:
Array.isEmpty array

Parameters

• array
  Type: 'T []

  The input array.

Return Value

true if the array is empty. Otherwise, returns false.

Remarks

This function is named IsEmpty in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.

Example

The following code shows how to use Array.isEmpty.

let printArray array1 = 
    if (Array.isEmpty array1) then
        printfn "There are no elements in this array."
    else
        printfn "This array contains the following elements:"
        Array.iter (fun elem -> printf "%A " elem) array1
        printfn ""
printArray [| "test1"; "test2" |]
printArray [| |]

Output

This array contains the following elements:
"test1" "test2" 
There are no elements in this array.

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

See Also

Reference

Collections.Array Module (F#)

Microsoft.FSharp.Collections Namespace (F#)