In the previous tip we explained how you can use Select-String and a regular expression to extract valuable information from raw text results:
PS C:\> $data = ipconfig | select-string 'IPv4'
PS C:\> [regex]::Matches($data,"\b(?:\d{1,3}\.){3}\d{1,3}\b") | Select-Object -ExpandProperty Value
192.168.2.112
PowerShell supports the -match parameter which also matches regular expressions. It can only find one match per line, though. In most scenarios, this is not a problem though because most often, there is only one match per line anyway. All you need to do is use -match inside a pipeline so the raw input is processed line by line:
PS C:\> ipconfig |
# do raw filtering to only get lines with this word
Where-Object { $_ -like '*IPv4*' } |
# do RegEx filtering to identify the value matching the pattern
Where-Object { $_ -match '\b(?:\d{1,3}\.){3}\d{1,3}\b' } |
# return the results from -match which show in $matches
Foreach-Object { $matches[0] }
192.168.2.112
