Master intermediate to advanced techniques of the Perl programming language starting with a focus on regular expressions and some of their advanced features. This book then covers other pro-level features, including formatted output, file handling, and more.

Additionally, you'll learn and explore the most useful built-in variables, pragmas, and modules available in the Perl language. Furthermore, you'll work with geometry managers and get a thorough treatment of graphical user interface development using Perl/TK and widgets. Lastly, you'll cover debugging techniques.

Pro Perl Programming is a professional-level reference guide on Perl and includes important aspects of it that you need as a professional programmer.

You will:

• Program regular expressions including atoms, smartmatch operators, and more
• Use advanced features such as HiRes Time, slurp() functions, Critic, Tidy and many more functions
• Handle advanced formatted output such as printf and sprintf
• Explore useful built-in variables, including status variables, separator variables, and the signal handle variable
• Explore and use Perl's built-in modules, including the Pragma modules
• Work with Perl/TK and its widgets-like geometry managers, frames, labels, buttons, check buttons, radio buttons, scrollbars, scales, entries, and menus

Autorentext
At the impressionable age of 14, William "Bo" Rothwell crossed paths with a TRS-80 Micro Computer System (affectionately known as a Trash 80).  Soon after the adults responsible for Bo made the mistake of leaving him alone with the TSR-80.  He immediately dismantled it and held his first computer class, showing his friends what made this computer thing work. Since this experience, Bo's passion for understanding how computers work and sharing this knowledge with others has resulting in a rewarding career in IT training.  His experience includes Linux, Unix, DevOps tools, and programming languages such as Perl, Python, Tcl, and BASH.

Inhalt
Chapter One Intermediate Regular Expressions1.1Review: Basic Regular Expressions1.2Modifiers 1.3Getting the Nth occurrence of a match 1.4Greedy vs. Non-Greedy matches 1.5Regular Expression variables 1.6Special characters in regular expressions 1.7Assertions 1.8Reading from filehandles using split1.9Multiple line matching1.10Commenting Regular Expressions1.11Alternative Delimiters1.12Additional resources1.13Lab Exercises
Chapter Two Advanced Regular Expressions2.1 Make use of the Smartmatch Operator2.2 Understand Regular Expression precedence2.3 Understand what is NOT a Regular Expression atom2.4 Using Regular Expressions in List Context2.5 Match whitespace properly2.6 Use \G2.7 Use the \A, \Z and \z assertions2.8 Avoid capturing 2.9 Avoid the variables $`, $& and $' 2.10 Compile your Regular Expressions before using them 2.11 Benchmark your patterns 2.12 Use Regexp::Common 2.13 Flags you should consider always using 2.14 Avoid escapes 2.15 Use the re Pragma 2.16 Understand backtracking  Chapter Three Advanced Features3.1 Use my iterator variables with for loops3.2 Utilize loop labels3.3Avoid using for file matching3.4Time::HiRes3.5Contextual::Return3.6Indirect Filehandles3.7The three argument technique to the open statement 3.8Always check the return values of open, close and when printing to a file 3.9Close filehandles as soon as possible 3.10Avoid slurping 3.11Creatively use the do statement3.12Use the slurp() function3.13Test for interactivity3.14Use IO::Prompt3.15Understand where to find documentation3.16Understand context3.17Understand the => operator3.18Understand subroutine calls3.19Understand and/or versus &/||3.20Use Perl::Tidy3.21Use Perl::Critic3.22Understand Getopt::Std3.23Understand Getopt::Long3.24Alternative commenting technique 3.25Passing notes within a Perl program 3.26Use Smart::Comments
Chapter Four Advanced Formatted Output4.1Review: The format statement4.2Advanced format statement features4.3printf and sprintf4.4Using select4.5The operator4.6Additional Resources4.7Lab Exercises
Chapter Five Exploring Useful Built-in Variables 5.1Perl's built-in variables5.2Variables reference chart5.3Use English5.4.Status variables5.5Separator variables5.6The signal handle variable5.7Version of Perl5.8Program start time5.9Additional Resources5.10Lab Exercises
 Chapter Six Advanced File Handling6.1Review: Basic File Handling6.2Displaying the file position6.3Moving the file position6.4Opening files for reading and writing6.5Making "files" within your script6.6Locking files6.7Flushing output buffers6.8Additional Resources6.9Lab Exercises

Chapter Seven Pragmas7.1Perl pragmas7.2Pragma ch...