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powershellpowershell-4.0

How do I get the number of distinct files in a directory in powershell?

I currently have this code which returns the total number of files but I don't want to count multiple files in this number count?

Lets say I have this:

01Red.txt
01Blue.txt
02Red.txt
05Red.txt
05Green.txt

Get-ChildItem -File *.txt -Path "C:\Users\Test\Desktop\TestDirectory" | Measure-Object | %{$_.Count}

I want to return a total count of 3 based on 01,02,05 but with my code I get 5.

How can I get it to return 3 and ignore everything past the first 2 characters in the string?

Solution

  • I might suggest Group-Object:

    Get-ChildItem *.txt | Group-Object { $_.Name.Substring(0,2) }

    Add | Measure-Object to count the number of groupings (this would be 3 in your example).