Retour d'un tableau avec un seul élément dans PowerShell

Question

Cela devrait être très simple - J'ai besoin de retourner un tableau de hashtables à partir d'une fonction. Cela fonctionne quand il y a plus d'une hashtable, mais quand il n'y en a qu'une alors le résultat n'est pas un tableau. Je préfère ne pas tester si le résultat est un tableau ou non.

function GetArrayWith1Hashtable() 
{ 
    $array = @() 

    $hashtable = @{} 
    $hashtable["a"] = "a" 
    $hashtable["b"] = "b" 
    $hashtable["c"] = "c" 
    $array += $hashtable 

    Write-Host "GetArrayWith1Hashtable array.Length =" $array.Length 
    Write-Host "GetArrayWith1Hashtable array.Count" $array.Count 
    Write-Host "GetArrayWith1Hashtable array[0].Keys" $array[0].Keys 

    $array 
} 

function GetArrayWith2Hashtables() 
{ 
    $array = @() 

    $hashtable = @{} 
    $hashtable["a"] = "a" 
    $hashtable["b"] = "b" 
    $hashtable["c"] = "c" 
    $array += $hashtable 

    $hashtable2 = @{} 
    $hashtable2["d"] = "d" 
    $hashtable2["e"] = "e" 
    $hashtable2["f"] = "f" 
    $array += $hashtable2 

    Write-Host "GetArrayWith2Hashtables array.Length = " $array.Length 
    Write-Host "GetArrayWith2Hashtables array.Count = " $array.Count 
    Write-Host "GetArrayWith2Hashtables array[0].Keys =" $array[0].Keys 
    Write-Host "GetArrayWith2Hashtables array.Count = "$array[1].Keys 

    $array 
} 

$result1 = GetArrayWith1Hashtable 
# $result1.Length - not available 
Write-Host "Result of GetArrayWith1Hashtable result1.Count = " $result1.Count      # Count = 2 (would expect this to be 1) 
# $result1[0] not available - not an array 

$result2 = GetArrayWith2Hashtables 
Write-Host "Result of GetArrayWith2Hashtables result2.Length = " $result2.Length # Length = 2 
Write-Host "Result of GetArrayWith2Hashtables result2.Count = "  $result2.Count # Count = 2 
Write-Host "Result of GetArrayWith2Hashtables result2[0].Keys = "  $result2[0].Keys # Keys = c a b 
Write-Host "Result of GetArrayWith2Hashtables result2[1].Keys = "  $result2[1].Keys # Keys = d e f 

<# 
    FULL OUTPUT: 

GetArrayWith1Hashtable array.Length = 1 
GetArrayWith1Hashtable array.Count 1 
GetArrayWith1Hashtable array[0].Keys c a b 

Result of GetArrayWith1Hashtable result1.Count = 2 

GetArrayWith2Hashtables array.Length = 2 
GetArrayWith2Hashtables array.Count = 2 
GetArrayWith2Hashtables array[0].Keys = c a b 
GetArrayWith2Hashtables array.Count = d e f 

Result of GetArrayWith2Hashtables result2.Length = 2 
Result of GetArrayWith2Hashtables result2.Count = 2 
Result of GetArrayWith2Hashtables result2[0].Keys = c a b 
Result of GetArrayWith2Hashtables result2[1].Keys = d e f 

#> 

Answer 1

Juste jeter le type de retour à un tableau:

$result1 = @(GetArrayWith1Hashtable)