use Perl

• Various one-liners from MNooning (Score:1)

  by mhn (7491) on 2009.12.18 16:09 (#71425)

  MNooning wrote:
  
  Here are some Windows one-liners. On Linux, use single quotes and forward slashes.
  Find the INC path that Perl sees when it starts up.
  >perl -e "print qq[INC = @INC\n];"
  INC = C:/Perl/site/lib C:/Perl/lib .
  
  Another way to find the INC path.
  perl -wle "print for @INC"
  C:/Perl/site/lib
  C:/Perl/lib
  
  Find out if a module is installed. If it is, no error messages will show.
  >perl -e "use Tk"
  
  Obtain the version of an installed module.
  >perl -MTk -e "print \"$Tk::VERSION\n\"
  804.028501
  
  Here is the same command on Cygwin
  >$ perl -MTk -e 'print $Tk::VERSION'
  804.028
  This is what you see if the module is not there:
  >perl -e "use TkBad"
  Can't locate TkBad.pm in @INC (@INC contains: C:/Perl/site/lib C:/Perl/lib .) at -e line 1. BEGIN failed--compilation aborted at -e line 1.
  
  
  This is also what you see if the module is not there:
  >perl -MTkBad -e "print \"$TkBad::VERSION\n\"
  Can't locate TkBad.pm in @INC (@INC contains: C:/Perl/site/lib C:/Perl/lib .). BEGIN failed--compilation aborted.
  
  Here is an example of getting the version of an installed module in a deep path. Again, the syntax is different on Linux.
  C:\oldProjects\proj_bu_2003\routines>perl -MCatalyst::Authentication::Store::LDAP -e "print \"$Catalyst::Authentication: :Store::LDAP::VERSION\n\"
  0.1005
  
  This is a bit of a different one-liner subject, but a quick way to scroll a module's package file is
  >perldoc -m Tk

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