Return the unique items from a sorted list.
Syntax
Get-Unique [-inputObject psobject] [-asString] [CommonParameters]
Get-Unique [-inputObject psobject] [-onType] [CommonParameters]
Key
-asString
Treat the data as a string, not an object.
Use this parameter to find the unique values of object properties
e.g. file names.
For a collection of objects of the same type, Get-Unique will
returns just one (the first).
-inputObject
The objects to filter. Enter a variable that contains the objects or type
an expression that returns the objects.
When the -InputObject parameter is used to submit a collection of items,
Get-Unique receives one object that represents the collection.
Because one object cannot be filtered, Get-Unique returns the entire collection unchanged.
To filter multiple items, pipe them to Get-Unique.
This parameter is an implementation detail: its purpose is to enable input via the pipeline, and its
direct use with arrays (collections) does not (yet) provide any useful functionality.
-onType
Return only one object of each type.
Standard Aliases for Get-Unique: gu
Sort an array of integers, and display the unique values:
PS C:\> 2,4,6,8,2,64,4,2,99,3 | sort-object | Get-Unique
List every folder on the C: drive that contains one or more .xls files:
PS C:\> Get-ChildItem C:\ -include *.xls -recurse |
ForEach-Object {$_.directoryName} | Get-Unique
Get the names of processes running on the computer with duplicates eliminated:
PS C:\> Get-Process | sort-object | Select-Object processname | Get-Unique -asstring
Find the number of unique words in a text file:
$a = $(ForEach-Object ($line in Get-Content C:\docs\File1.txt) {
$line.tolower().split(" ")
}) | Sort-Object | Get-Unique
$a.count
“An Englishman, even if he is alone, forms an orderly queue of one” ~ George Mikes
Get-Random - Get a random number.