Combining Multiple String Commands Into One Line - powershell

Question

I'm using PowerShell and running a tool to extract Lenovo hardware RAID controller info to identify the controller number for use later on in another command line (this is part of a SCCM Server Build Task Sequence). The tool outputs a lot of data and I'm trying to isolate just what I need from the output.
I've been able to isolate what I need, but I'm thinking there has to be a more efficient way so looking for optimizations. I'm still learning when it comes to working with strings.
The line output from the tool that I'm looking for looks like this:
0 0 0 252:0 17 DRIVE Onln N 557.861 GB dsbl N N dflt -
I'm trying to get the 3 characters to the left of the :0 (the 252 but on other models this could be 65 or some other 2 or 3 digit number)
My existing code is:
$ControllerInfo = cmd /c '<path>\storcli64.exe /c0 show'
$forEach ($line in $ControllerInfo) {
if ($line -like '*:0 *') {
$ControllerNum = $line.split(':')[0] # Get everything left of :
$ControllerNum = $ControllerNum.Substring($ControllerNum.Length -3) # Get last 3 chars of string
$ControllerNum = $ControllerNum.Replace(' ', '') # Remove blanks
Write-Host $ControllerNum
break #stop looping through output
}
}
The above works but I'm wondering if there's a way to combine the three lines that start with $ControllerNum = so I can have just have a single $ControllerNum = (commands) line to set the variable instead of doing it in 3 lines. Basically want to combine the Split, Substring and Replace commands into a single line.
Thanks!

Answer 1

Here's another option:
$ControllerNum = ([regex]'(\d{2,3}):0').Match($line).Groups[1].Value
Used on your sample 0 0 0 252:0 17 DRIVE Onln N 557.861 GB dsbl N N dflt -
the result in $ControllerNum wil be 252

Answer 2

If you want just the last digits before the first :, without any whitespace, you can do that with one or two regex expressions:
$line -replace '^.*\b(\d+):.*$','$1'
Regex explanation:
^ # start of string
.* # any number of any characters
\b # word boundary
( # start capture group
\d+ # 1 or more strings
) # end capture group
: # a literal colon (:)
.* # any number of any characters
$ # end of string
replacement:
$1 # Value captured in the capture group above