How do I…

How do I…

How do I get data from a database?

DBI,and its DBD children,like DBD::SQLite

How do I get data from a web page?

LWP stands for "libwww-perl",and is the standard way of talking to web pages.

WWW::Mechanize is a superset of LWP that makes HTML processing easier.

How do I do date calculations?

Use Date::Manip,Date::Calc or DateTime.All have different styles and different capabilities.

How do I handle command-line arguments in my program?

Use Getopt::Long.

How do I write CGI programs?

Use CGI.

How do I parse HTML?

Whatever you do,don't use regular expressions.Use HTML::Parser or one of the many classes that uses it.Look around on http://search.cpan.org.

If you're parsing HTML so that you can extract links or images from a web page,use WWW::Mechanize which handles it for you.

How do I parse XML?

See the list of Recommended XML Modules at the Perl 5 wiki.

http://www.perlfoundation.org/perl5/index.cgi?recommended_xml_modules

How do I know if a URL is valid?

How do I do screen access?

How do I do colors?

Use Term::ANSIColor.Example wanted.

How do I do readkey?How do I enter passwords without seeing them entered?

Use Term::ReadKey (http://search.cpan.org/dist/TermReadKey).It's a standard core module.

    use Term::ReadKey;
 
    ReadMode('noecho');
    my $passwd;
    my $pwcheck;
 
    print 'password: ';
    chomp($passwd = <STDIN>);
    print "\n";
 
    print 'verify: ';
    chomp($pwcheck = <STDIN>);
    print "\n";
    ReadMode('normal');
 
    print "You entered [$passwd] and [$pwcheck]\n";