Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations strongm on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
-
ARGV question
You might try looking at the Getopt::Std module, or the Getopt::Long module - read the perldocs on these modules that come included with Perl by doing perldoc Getopt::Std or perldoc Getopt::Long at a command prompt. HTH. Hardy Merrill -
for web applications, what does perl have over php?
I'll add a few cents of my own ;-) I've used both - Perl is a more mature, very stable language - I like Perl a lot - for everything. Perl as DBI for database integration, which is excellent and rock solid - as of 1 1/2 years ago(I haven't used PHP in the last year and a half), PHP didn't have... -
Finding the Modification Date on a file
Backticks is the easiest solution, but just for the sake of completeness, I'll offer this: $ls_command = "ls -rltd $file |"; open(LS_COMMAND,"ls -l message |) || die "Can't open the ls command!"; while (<LS_COMMAND>) { print "Here is a line of ls output... -
A Small Perl Program involving mysql I need help with.
Are you using the DBI and DBD::mysql modules in Perl? Assuming you have DBI and DBD::mysql installed, you could create a script do this: 1. connect to mysql database 2. select all rows in table B 3. for each row in table B save value of column x in variable $x SELECT x... -
Get All The Current Environment Variables Into An Array
jamisar, sorting was something that I chose to do - it is *NOT* necessary. I copied and pasted that from something I use to display the enviroment variables in a cgi script, and the sort just happened to be in there. HTH. Hardy Merrill Hardy Merrill -
Get All The Current Environment Variables Into An Array
The environment variables are in the %ENV hash - do this: foreach $key (sort keys %ENV) { print "$key=$ENV{$key}\n"; } HTH. Hardy Merrill -
getopt - won't allow an option to have param, or NOT have param
I'm a python newbie, and I'm trying to use "getopt" to process command line arguments. I'd like to be able to specify a command line option that *could* have an associated argument, but getopt is forcing me to declare each option to be *either* 1. with an associated argument *or*... -
Is there any data type validation in perl?
You really need to read up on Perl - start by doing perldoc perl at a command prompt. The way data validation is done in Perl is normally by using regular expressions - read about Perl regular expressions by doing perldoc requick and/or perldoc perlretut HTH. Hardy Merrill -
single digit decimal to 2 digit hex
This works: printf "%02x%02x%02x\n", 0,1,2; HTH. Hardy Merrill -
how to match multichar atoms in regexp?
/([^(asdf)]*)/ The square brackets means character class - each character in between the square brackets is a member of a character class that you are defining. When you say [^(asdf)] you are really saying match any character which is not(^) one of the characters "(", "a"... -
writing .txt files outside of CGI directory (apache/win98se) ???
How did you figure that out? I just looked through the 'perldoc perlwin32' and I didn't see anything like that - I couldn't really find anything on windows paths needing the directories separated by *forward* slashes. I'm confused ;-) Hardy Merrill -
writing .txt files outside of CGI directory (apache/win98se) ???
Does your open look like open(LOG, ">C:\Program Files\Abria Merlin\Apache\htdocs\site\test1.txt") || &ErrorMessage; ??? What error message(s) are you getting? Not sure about Windows, but on *nix, you need to ensure that the user("apache" or "nobody" or ???)... -
How can I make a perl program to wait
The "sleep" function usually works - not sure on Win NT thought. Do 'perldoc -f sleep' at a command prompt to see the perldocs on "sleep". HTH. Hardy Merrill -
Sybase DBD issue
If you don't get an answer here or in MS SQL, ask your question on the DBI mailing list - there are many excellent people on that list, including many who are very knowledgable about Sybase and DBD::Sybase. HTH. Hardy Merrill -
Finding the first instance only of a number in a file
my $abs_file = "/path/to/file"; open(IN, "<$abs_file") || die "Can't open $abs_file!" while(<IN>) { if (/^\d\d\d/) { ### This is a good line - it starts with 3 digits } } HTH. Hardy Merrill -
Easy question for an easy answer. PERL/database
I can't be much help on the Windows platform - I'm on Red Hat Linux 7.3. Assuming you'll use ODBC, you'll need DBI and DBD::ODBC (I think - I've never used ODBC, but I'm pretty sure that's what the DBD driver is called) - you can find them at www.cpan.org, or search.cpan.org. Once you've... -
Creation date and time.
If Perl can do it, my guess is that the "stat" function would be *the* function. But according to 'perldoc -f stat' stat FILEHANDLE stat EXPR stat Returns a 13-element list giving the status info for a file, either the file opened via... -
I want STDOUT's filename!
I guess I don't understand. Won't my $stdout = \*STDOUT; give you what you want in $stdout? Then, if you do print $stdout "Some text or something\n"; won't that go to the file that STDOUT is pointing to? What am I missing? Hardy Merrill -
the DIE command
At a command prompt, do perldoc -f die to read what the "die" does. You could say open(MCF,"member_colour_file.txt") || print "error message"; but after printing "error message", your program would continue on, which is not what you want. I'd... -
Perl for Lamers?
One thing I forgot to mention - if your system already has Perl on it, Perl *comes with* excellent documentation called "perldocs". To get started, you can do perldoc perl at a command prompt - that will list all the different topics covered by the perldocs. Then, to look at one...
