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Null coalescing with Object properties

Posted by: | October 28, 2019 Comments Off on Null coalescing with Object properties |

The Null coalescing operators were introduced in PowerShell v7 preview 5. last time you saw how to use Null coalescing with variables. You can also use Null coalescing with Object properties.

Let’s first create an object.

PS> $prop = @{Nullprop = $null; NonNullProp = ‘something’}
PS> $obj = New-Object -TypeName PSobject -Property $prop


Yes, I know there other ways but I prefer this approach.

Using the Null coalescing operator

PS> $obj.NonNullProp ?? ‘is null’
PS> $obj.NullProp ?? ‘is null’
is null


is very similar to working with variables.

The Null coalescing assignment operator

PS> $obj.NonNullProp ??= ‘is null’
PS> $obj.NullProp ??= ‘is null’
PS> $obj | Format-List

NonNullProp : something
Nullprop : is null


If the property is non-null nothing happens. If the property is null the property is assigned the value on the right hand side of the operator.


To my mind the Null coalescing operator and the Ternary operator introduced in PowerShell v7 preview 4 fall into the same category of great if you need to perform these operations on a regular basis and are used to thinking in these terms but otherwise not something to bother with. We’ve managed to survive through 6 versions of PowerShell without them and I don’t see them as a great step forward or particularly useful for IT administrators.

under: PowerShell 7

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