Call-Method v2

This is a follow-up article to Call-Method.

When PowerShell pipes a collection or array, it unwraps the object and passes the individual items in the collection/array. This is normally a very useful behavior, but if you pipe to function like Get-Member and Call-Method, you do not always get
what you want. Let me show how it works -

# Construct an array
$array=1,2,3

# Pass the array down the pipeline
# Gettype will be called 3 times for each integer
# in the array
$array | cm gettype

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     Int32                                    System.ValueType
True     True     Int32                                    System.ValueType
True     True     Int32                                    System.ValueType

# Wrap array with the array operator. This changes
# nothing as the array operator only creates an array
# if there is none
@($array) | cm gettype

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     Int32                                    System.ValueType
True     True     Int32                                    System.ValueType
True     True     Int32                                    System.ValueType

# Pass an array with the first argument being our
# array - this works
,$array | cm gettype

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     Object[]                                 System.Array

# Use the updated Call-Method and use the InputObject
# argument - like the one found on Get-Member
cm gettype -InputObject $array

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     Object[]                                 System.Array


## This is the updated Call-Method function

function Call-Method($method,$InputObject) {
    begin {
        if ($inputObject) {
            $m=$inputObject.$method
            $m.invoke($args)
            }
        }
    process {
        if ($_) {
            $m=$_.$method
            $m.invoke($args)
        }
    }
}
new-alias -force cm Call-Method