On approximately 8/5/2003 1:56 PM, came the following characters from the keyboard of Chien-Lung Wu:
Hi,
In the bash, I can test a file or a directory by following:
if [ ! (-f a_filename)]; then do_something_for_this_file fi
if [ ! (-d a_dirname)]; then do_something_for_this_dir fi
How can I do the same functions in perl?
Approximately the same way. Look for the "named unary operators" in perlop, and -X in perlfunc (the first in the Alphabetical listing of perl functions).
Another question:
In the unix/linux system, we have the path, for instance,
/usr/local/bin/perl
However, in the Window/NT system, I have installed perl in g:\perl\bin\perl.exe How can I reference the path for perl.exe?
Is it "g:\perl\bin\perl.exe" or something else?
Windows does things differently than unix. Since #! is a comment to perl, but a directive to Unix, you can leave your favorite path to Unix perl in your "cross-platform" scripts. But in order to associate a script with its engine on Windows, a file must have a suffix. The usual suffix for perl scripts is ".pl". Installing ActiveState will set up the association by default. If you use a different distribution or compile your own, the following commands will do it for you....
ftype Perl="C:\Perl\bin\perl.exe" "%1" %*
assoc .pl=PerlIf you installed perl.exe somewhere else, that is what to use in the ftype command... the path shown is the default path for ActiveState.
So your cross platform script could be name foo.pl and start with #!/usr/local/bin/perl -w
or, you can invent your own technique.
-- Glenn -- http://nevcal.com/ =========================== Like almost everyone, I receive a lot of spam every day, much of it offering to help me get out of debt or get rich quick. It's ridiculous. -- Bill Gates
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