Advanced Perl programming : from advanced to expert /: from advanced to expert. (2020)

• Record Type: Book
• Further Information: Note: William "Bo" Rothwell.
• Other Names: Rothwell, William "Bo"
• Contents: Intro -- Table of Contents -- About the Author -- About the Technical Reviewer -- Acknowledgments -- Chapter 1: Command-Line Options -- Changing input record separator -- Create a loop around your script -- Looping and printing -- Looping and parsing -- Editing in place -- Flexibility in backup filenames -- Backing up to different directories -- Syntax checking -- Pre-appending to @INC -- Manipulate @INC at compile time -- Using the -I option -- Including modules -- Using -M to load specific identifiers from modules -- Alternative syntax to -M -- Command-line parsing Displaying configuration information -- Extracting scripts from messages -- Handling extra text after end of script -- Additional resources -- Lab exercises -- Chapter 2: References -- Creating references -- Returning the value from a reference -- Other methods of referencing arrays -- Arrays of scalar references -- Another method of referencing hashes -- The ref function -- Making anonymous references -- Method #1 -- Method #2 -- Method #1 -- Method #2 -- References to functions -- use strict'refs' -- Making use of symbolic references -- Additional resources -- Lab exercises Chapter 3: Advanced Data Types: Arrays -- What you should already know about arrays -- Creating arrays -- Returning values in arrays -- Adding and removing elements in an array -- Looping through the array -- Array operators -- The reverse operator -- The sort operator -- The qw operator -- Array separator variable -- Regular expression matching with grep -- What you might know about arrays -- Changing #array changes the size of the array -- Arrays returned in scalar context returns the number of elements in the array -- Changing the variable in a foreach loop changes the array elements The _ variable is used by default in a foreach loop -- The foreach loop and for loops are the same thing -- Arrays of arrays -- Method #1 -- Make an array for each data type -- Method #2 -- Make an array for each transaction -- Method #3 -- Make an array of arrays -- Creating arrays of arrays -- Rows and columns -- Creating a multi-dimensional array from STDIN -- Accessing values in an array of arrays -- Adding a subarray (row) -- Adding a column -- Printing an array of arrays -- Additional resources -- Lab exercises -- Chapter 4: Advanced Data Types: Hashes What you should already know about hashes -- Creating associative arrays -- Accessing values in an associative array -- Removing associative array keys and values -- exists vs. defined -- What you might know about hashes -- Keeping order in hashes -- Additional useful hash modules -- Inverting a hash: method #1 -- Inverting a hash: method #2 -- Hashes of hashes -- Approach #1 -- Make four arrays, one for each student -- Approach #2 -- Make three associative arrays, one for each test -- Approach #3 -- Make a hash of hashes -- Creating hashes of hashes -- Accessing values in a hash of hashes
• Publisher Details: Berkeley, CA : Apress L.P
• Publication Date: 2020
• Extent: 1 online resource (296 pages)
• Subjects: 005.13/3; Perl (Computer program language); Electronic books
• Languages: English
• ISBNs: 9781484258637; 1484258630
• Related ISBNs: 1484258622; 9781484258620
• Notes: Note: Print version record.
• Access Rights: Legal Deposit; Only available on premises controlled by the deposit library and to one user at any one time; The Legal Deposit Libraries (Non-Print Works) Regulations (UK).
• Access Usage: Restricted: Printing from this resource is governed by The Legal Deposit Libraries (Non-Print Works) Regulations (UK) and UK copyright law currently in force.