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Using Array Variables
This section describes how an array variable can be assigned with a list value. Array elements are referred by subscription notation as scalar expressions, like $identifier[i]. An unassigned array variable contains the (undef) value.
2022-10-24, ∼155🔥, 0💬

Typeglob and Importing Identifiers from Other Packages
This chapter provides tutorial examples and notes about typeglob and importing identifiers from other packages. Topics include accessing typeglobs from package's symbolic table; defining alias for identifiers from other packages; using Exporter to export and import identifiers from other packages.
2022-10-23, ∼181🔥, 0💬

DirGrep.pl - Searching Text in Directory Files
This section provides a tutorial example, DirGrep.pl, to search text in files and sub directories using a recursive method to walk through a directory tree.
2022-10-23, ∼146🔥, 0💬

Expression Evaluation Context
This section describes expression evaluation contexts: scalar context and list context. Operations and function may behave differently in different context. A list value in a scalar context is converted by taking the last value.
2022-10-19, ∼144🔥, 0💬

RPC::XML Client and Data Classes
This section describes the RPC::XML::Client class, the RPC::XML::request class, and data classes.
2022-10-19, ∼159🔥, 0💬

require() Function - Including Script Files
This section provides a tutorial example showing you how to the require() function is better than the do() function - if the same file is included multiple time, the require() function will only execute it once.
2022-10-19, ∼221🔥, 0💬

SubReturnValue.pl - Example on Return Values
This section provides a tutorial example on how a list value can be returned from a subroutine to the caller using the return statement.
2022-10-19, ∼136🔥, 0💬

XML Communication Model
This chapter provides tutorial examples and notes on XML communication model. Topics include sending and receiving XML messages over socket communication connections; XML communication server and client sample programs: GameServer.pl and GameClient.pl.
2022-10-18, ∼191🔥, 0💬

Scalar Value Constructors
This section describes what is a scalar value constructor, a numeric literal or a string literal, and what are syntax rules on using scalar value constructors.
2022-10-18, ∼167🔥, 0💬

What Is an Expression?
This section describes what is an expression, a mixture of values, variables, operations of expressions and function calls. A tutorial example is provided to show you examples of expressions..
2022-10-18, ∼139🔥, 0💬

Install Perl Module with CPAN Shell
This section provides a tutorial on how to install a CPAN Perl module automatically with CPAN Shell.
2022-10-18, ∼175🔥, 0💬

Perl Version Pre-Installed on macOS
This section provides notes to verify Perl version supported on macOS and run a simple Perl script.
2022-10-18, ∼179🔥, 0💬

Configuring IIS 5.0 for Perl Programs
This section describes how to configure IIS (Internet Information Services) Web server to run Perl programs through CGI (Common Gateway Interface).
2022-10-18, ∼242🔥, 0💬

String Related Built-in Functions
This section describes built-in functions to manipulate strings: chop(), length(), index(), substr(), split().
2022-10-17, ∼157🔥, 0💬

Perl on macOS Computers
This chapter provides tutorial examples and notes on using Perl on macOS computers. Topics include verify Perl installation on macOS; installing Xcode Command Line Tools; configuring CPAN Shell tool; installing Perl module from CPAN repository; installing Perl module from source code.
2022-10-17, ∼211🔥, 0💬

Publishing HTML Documents as Web Pages
This section describes how to publish a HTML document on the Apache HTTP server.
2022-10-17, ∼159🔥, 0💬

Image and Picture Processing
This chapter provides tutorial examples and notes on creating and processing images and managing image file formats. Topics include installing 'Imager' module; drawing graphical elements; converting image file formats; trying to install 'Imager::File::PNG'.
2022-10-17, ∼194🔥, 0💬

XmlSimpleHash.pl - XML Hash Example
This section provides a tutorial example on how to work with hashes resulted from the XML::Simple parsing operation, XMLin().
2022-10-16, ∼182🔥, 0💬

Redirecting Browser to a URI
This section provides a tutorial example on how to redirect the browser to go to a new URI with the redirect() method in the CGI.pm module.
2022-10-14, ∼157🔥, 0💬

SocketClient.pl - A Simple Socket Client Program
This section provides a tutorial example on how to write a simple socket communication client program, SocketClient.pl, which creates a socket and makes a connection request to a remote socket communication server.
2022-10-14, ∼175🔥, 0💬

Using MySQL Database Server
This chapter provides tutorial examples and notes on MySQL database server access. Topics include installing the DBI module and DBD::mysql module; creating a database connection with the DBI-&gt;connect() function.
2022-10-14, ∼162🔥, 0💬

Scalar Value Interpretation
This section describes how a scalar value will be interpreted in an operation. A tutorial example is provided to verify scalar value interpretation rules.
2022-10-14, ∼152🔥, 0💬

"Refresh" http-equiv Meta Tag
This section provides a tutorial example on how to create 'Refresh' http-equiv Meta Tag in the HTML document header to ask the browser to refresh Web pages.
2022-10-14, ∼162🔥, 0💬

Running Perl Scripts in "htdocs"
This section describes how to change Apache HTTP server configuration and run Perl CGI (Common Gateway Interface) scripts in the default DocumentRoot directory: \local\apache\htdocs.
2022-10-14, ∼163🔥, 0💬

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