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Symbolic (or Soft) References
This chapter provides tutorial examples and notes about symbolic (or soft) references. Topics include replacing variable or function identifiers with string expressions in curly brackets {}; using scalar variables without {}; using the dereference operator -&gt; with array, hash, or function sub... 2022-10-04, ∼245🔥, 0💬

http-equiv="Refresh" Meta Tag not Followed
This section provides a tutorial example showing that the LWP::UserAgent get() method does not follow the http-equiv='Refresh' meta tag in the response. 2022-10-04, ∼244🔥, 0💬

Expressions, Operations and Simple Statements
This chapter provides tutorial examples and notes about expressions, operations, and simple statements. Topics include different examples of expressions; expression evaluation contexts: scalar and list contexts; simple statements: an expression terminated by a semicolon; simple statement modifiers. 2022-11-19, ∼243🔥, 0💬

Install Perl Module from Source Code
This section provides a tutorial on how to install Perl module from source code using the 'make' utility manually on macOS. 2022-10-10, ∼243🔥, 0💬

Archived Tutorials
This chapter contains some archived tutorial notes and example codes from previous versions of this book. 2022-10-08, ∼243🔥, 0💬

DBM Database Example - English French Dictionary
This section provides a tutorial example of using DBM database files to build an English to French dictionary with insert, update, delete and print functions. 2022-10-08, ∼243🔥, 0💬

Install Imager::File::PNG Manually
This section provides a tutorial example on how to install Imager::File::PNG Perl module manually from source code files on macOS. Installation failed with wrong architecture in LIBPNG library. 2022-11-03, ∼242🔥, 0💬

SubParamList.pl - Example on Parameter List
This section provides a tutorial example on how the parameter list is passed to and received in a user defined subroutine by the local array variable @_. 2022-10-24, ∼241🔥, 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, ∼241🔥, 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, ∼241🔥, 0💬

HTTP::Cookies save() not Saving Temporary Cookies
This section provides a tutorial example showing that the save() method in the HTTP::Cookies class does not save any temporary (non-persistent) cookies to the cookie jar file. 2022-10-04, ∼241🔥, 0💬

References
List of reference materials used in this book. 2022-11-19, ∼240🔥, 0💬

Imager - Draw Graphical Elements
This section provides a tutorial example on how to draw graphical elements using line(), box(), circle() functions of the Perl Imager module. 2022-10-12, ∼240🔥, 0💬

What Is Common Gateway Interface (CGI)?
This section describes what is CGI (Common Gateway Interface) - a protocol defines how a Web server program interacts with application programs. 2022-10-07, ∼240🔥, 0💬

Defining Returning Values of a Remote Method Call
This section describes how returning values of a remote method call can be defined in XML format. The root element name is 'methodResponse'. 2022-10-05, ∼240🔥, 0💬

Variables - Scalar, Array and Hash
This section describes Perl variable types: Scalar, Array, and Hash. Variable names must be prefixed with special symbols to indicate their types, $, @ and %. 2022-11-02, ∼238🔥, 0💬

String Related Built-in Functions
This section describes built-in functions to manipulate strings: chop(), length(), index(), substr(), split(). 2022-10-17, ∼238🔥, 0💬

String Built-in Functions and Performance
This chapter provides tutorial examples and notes about string built-in functions and performance. Topics include string built-in functions: chop(), length(), index(), substr() and split() functions; Perl functions are 2 times slower than Java functions. 2022-11-16, ∼236🔥, 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, ∼236🔥, 0💬

Using Scalar Variables
This section describes how a scalar variable can be assigned with a scalar value. An unassigned scalar variable contains the (undef) value. The undef() function removes the assigned value from a scalar variable. 2022-10-08, ∼236🔥, 0💬

LWP::UserAgent and Web Site Testing
This chapter provides tutorial examples and notes about using LWP::UserAgent Perl class. Topics include introduction of LWP::UserAgent, HTTP::Request, HTTP:Response, and HTTP::Cookies classes; using get(), post() and request() methods to send HTTP requests with GET or POST; following HTTP redirects;... 2022-10-07, ∼236🔥, 0💬

List Value Constructors
This section describes what is a list value constructor, a list of scalar values separated by commas. Elements of a list value can be accessed with the subscription notation [i]. 2022-10-31, ∼235🔥, 0💬

Using Hash Variables
This section describes how a hash variable can be assigned with a list value. Hash elements are referred by key subscription notation as scalar expressions, like $identifier{'key'}. An unassigned hash variable contains the (undef) value. 2022-10-12, ∼233🔥, 0💬

CGI (Common Gateway Interface)
This chapter provides tutorial examples and notes on CGI (Common Gateway Interface). Topics include CGI protocol specifications; environment variables provided by IIS; CGI query string; CGI example program. 2022-11-02, ∼231🔥, 0💬

<< < 1 2 3 4 5 6 7 8 > >>   ∑:177  Sort:Date

Android ASP Astrology Big5 Bitcoin Blowfish Built-in C# Calendar CD-DVD Cheminformatics Chinese Cryptography DES Email Encoding Ethereum Flash GB2312 General H Herong History HTML Java JavaScript JDBC JSP JVM Linux Molecule Movie Music MySQL Neural Network Perl PHP Physics PKI Publication Python REST SOAP Sorting Swing TV Series UML Unicode VBScript Web Web-Services Windows WSDL XML XMLPad XSD XSL-FO