I have this string in a Powershell Variable:
$buildParametersSourceBranch = refs/heads/pb/31333-test-branch/name
When I run $buildParametersSourceBranch.split('/')[2]
The result is pb. I assumed the split would show everything after the second / but it seems to only show the value between the second / and third /.
String.Split() doesn't "know" that you're only interested in a particular subset of the result and only want the string split in 2 places.
Use the -split operator and specify a max number of resulting substrings:
$rest = ($buildParametersSourceBranch -split '/',3)[2]
# or
$null,$null,$rest = $buildParametersSourceBranch -split '/',3