I mentioned a script a little bit verbose, but which won’t remove any local storage and won’t either clean the CCRC session.dat: nuke_view.pl: you can use it to remove all views from a workstation (which may not be available anymore) cleartool lsview -host myHostname -quick | xargs ccperl nuke_view.pl The -quick option is very important … Read more
Unfortunately, the accepted answer to this question is not yet complete… 🙂 Three (major) classes of parameters Assuming, your ImageMagick version is a recent one, here is an important amendment to it: you should differentiate between 3 major classes of command line parameters: Image Settings Image Operators Image Sequence Operators  These three classes do … Read more
This is a Windows/MS-DOS limitation. According to perldiag: You’re on a system such as MS-DOS that gets confused if you try reading from a deleted (but still opened) file. You have to say -i.bak, or some such. Perl’s -i implementation causes it to delete file1.txt while keeping an open handle to it, then re-create the … Read more
On Read,Invalid encoding otherthan sequence length On Read,Outside of Unicode,Unicode nonchar, orUnicode surrogate On Write,Outside of Unicode,Unicode nonchar, orUnicode surrogate :encoding(UTF-8) Warns and Replaces Warns and Replaces Warns and Replaces :encoding(utf8) Warns and Replaces Accepts Warns and Outputs :utf8 Corrupt scalar Accepts Warns and Outputs (This is the state in Perl 5.26.) Note that :encoding(UTF-8) … Read more
As others have pointed out perl blah.pl asdf works, while blah.pl asdf fails. This is because when you run the perl script directly, Windows realizes it must call perl, and uses the rule perl “%1”, which only passes the script name to perl, not any of the parameters. To fix this, you have to tell … Read more
Why source filters are bad: Nothing but perl can parse Perl. (Source filters are fragile.) When a source filter breaks pretty much anything can happen. (They can introduce subtle and very hard to find bugs.) Source filters can break tools that work with source code. (PPI, refactoring, static analysis, etc.) Source filters are mutually exclusive. … Read more
Use this recipe for manually installing perl modules: tar zxf Digest-SHA1-2.13.tar.gz cd Digest-SHA1-2.13 perl Makefile.PL make make test make install Note that some distributions will have a Build.PL file instead of Makefile.PL. In that case use this recipe: tar zxf … cd … perl Build.PL ./Build ./Build test ./Build install (You may be able to … Read more
The typical method most people have learned to handle exceptions is vulnerable to missing trapped exceptions: eval { some code here }; if( $@ ) { handle exception here }; You can do: eval { some code here; 1 } or do { handle exception here }; This protects from missing the exception due to … Read more
137=128+9, which means some other process has sent you a signal 9, which is SIGKILL. I.e. the other script kills yours, that’s what it looks like.
To find out in which encoding something unknown uses, you just have to try and look. The modules Encode::Detect and Encode::Guess automate that. (If you have trouble compiling Encode::Detect, try its fork Encode::Detective instead.) use Encode::Detect::Detector; my $unknown = “\x{54}\x{68}\x{69}\x{73}\x{20}\x{79}\x{65}\x{61}\x{72}\x{20}”. “\x{49}\x{20}\x{77}\x{65}\x{6e}\x{74}\x{20}\x{74}\x{6f}\x{20}”. “\x{b1}\x{b1}\x{be}\x{a9}\x{20}\x{50}\x{65}\x{72}\x{6c}\x{20}”. “\x{77}\x{6f}\x{72}\x{6b}\x{73}\x{68}\x{6f}\x{70}\x{2e}”; my $encoding_name = Encode::Detect::Detector::detect($unknown); print $encoding_name; # gb18030 use Encode; my $string … Read more