Is there a shorter way to pull groups out of a Powershell regex?

Question

In PowerShell I find myself doing this kind of thing over and over again for matches:

some-command | select-string \'^(//[^#]*)\' |
     %{some-other-command         


        

Answer 1

You can use the -match operator to reformulate your command as:

some-command | Foreach-Object { if($_ -match '^(//[^#]*)') { some-other-command $($matches[1])}}

Answer 2

You could try this:

Get-Content foo.txt | foreach { some-othercommand [regex]::match($_,'^(//[^#]*)').value } 

Answer 3

Named Replacement

'foo bar' -replace '(?<First>foo).+', '${First}'

Returns: foo

Unnamed Replacement

 'foo bar' -replace '(foo).+(ar)', '$2 z$2 $1'

Returns: ar zar foo