I have the following snippet of PowerShell:
$property = @{
Getter = { 80 };
}
$value = $property.Getter.Invoke()
$value.GetType() # Shows Name = Collection'1 instead of int
I would expect $value.GetType() to return Int32 but instead it returns a collection.
I can't just take element [0] because sometimes the Getter function will return an array.
How can I fix this?
You can strictly declare the type of the return value by this way. For example, the return type will be Double :
cls
$property = @{
Getter = [Func[Double]]{ 80 }
}
$value = $property.Getter.Invoke()
$value.GetType().Name
# Double
Getter a Func<double> instead of a ScriptBlock, and thus uses a very different Invoke method. This becomes relevant if you wanted to do something else with Getter than invoking it (like retrieving the AST).
$property = @{ Getter = ,{ 80 } }
Func<TResult> TResult:The type of the return value. learn.microsoft.com/en-us/dotnet/api/…Func assigned to Getter, but this is not the same as declaring the type of the value returned by the script block (e.g. Getter = { [double] 80 }, which of course does not resolve the issue because it's still a ScriptBlock)). It is important to note that these things are very different semantically, they just happen to both have Invoke methods -- $property.Getter.GetType() is different in both cases. Note that you can also declare it as Func[Object] or even Func[bool] -- PowerShell doesn't object to casting.
(,$value)[0]will give you the first element of the returned collection (and it always returns a collection, because that's the signature ofScriptBlock.Invoke()) without eagerly unrolling it if it's enumerable.$property.Getter.InvokeReturnAsIs().GetType()