Let's say I have this:
[System.Version]::new(1, 2, 3, 4)
How can I convert it into "3.4"? I'm interested in piping it if possible to avoid having to create an intermediary variable.
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7 Answers
this is ugly but it works inline fairly well. it uses the .Split() option to put the results into a specific number of items with all the remaining ones added to the last one.
([version]'1.2.3.4').ToString().Split('.', 3)[-1]
output = 3.4
Comments
Another ugly but inline solution, uses ForEach-Object to get at the piped reference.
[System.Version]::new(1, 2, 3, 4) | ForEach-Object { "$($_.Build).$($_.Revision)" }
Comments
You could also consider creating a Function for this that worked via Pipeline input:
Function ConvertTo-BuildRevision {
Param(
[Parameter(ValueFromPipeline)]
[system.version]
$Version
)
Process {
Return "$($Version.Build).$($Version.Revision)"
}
}
[System.Version]::new(1, 2, 3, 4) | ConvertTo-BuildRevision
This is obviously a lot more lines of code, but if you were performing this kind of conversion multiple times in your code would look a lot cleaner.
Comments
Here's another option, that uses Select-Object and a calculated property to get the result you want as a property named BR which is then returned:
([System.Version]::new(1, 2, 3, 4) | Select @{N ='BR'; E = { "$($_.Build).$($_.Revision)" }}).BR
Comments
If you set it to a variable, you can do this:
$version = [System.Version]::new(1, 2, 3, 4)
"$($version.Build).$($version.Revision)"
Comments
A regex-based solution with the -replace operator:
PS> [System.Version]::new(1, 2, 3, 4) -replace '^(.+?\.){2}'
3.4
Comments
Using a wrapper and adding a ScriptProperty:
Function New-Version {
$Version = New-Object System.Version $Args
$Version | Add-Member ScriptProperty BuildRevision {"$($This.Build).$($This.Revision)"}
Write-Output $Version
}
(New-Version 1 2 3 4).BuildRevision
3.4
