CODE EXAMPLE FOR SHELL

get last line from string powershell

(gc "c:myfile.txt") | % -Begin {$test = (gc "c:myfile.txt" | select -first 1 -last 1)} -Process {if ( $_ -eq $test[0] -or $_ -eq $test[-1] ) { $_ -replace "-" } else { $_ }} | Set-Content "c:myfile.txt"