Perl Programming Essentials

Live Classroom
Duration: 3 days
Live Virtual Classroom
Duration: 3 days
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This course dives into the core Perl and web development world. This is an intermediate and beyond level course, coupling the most current, effective techniques with best practices. It equips participants with the skills and knowledge required to carry our effective programming in Perl and manage the associated tasks in an enterprise environment, helping them get back to work prepared to immediately simplify and automate the tasks in their organization using Perl.

What You'll Learn

  • Create a working script that gets input from the command line, the keyboard, or a file
  • Use arrays to store and process data from files
  • Create formatted reports
  • Use regular expressions
  • Use the appropriate types of variables and data structures
  • Refactor duplicate code into subroutines and modules
  • What is available in the standard library
  • Use shortcuts and defaults, and what they replace


  • What is Perl?
  • Perl is compiled and interpreted
  • Perl advantages and disadvantages
  • Downloading and installing Perl
  • Which version of Perl
  • Getting help

  • Structure of a Perl program
  • Running a Perl script
  • Checking syntax and warnings
  • Execution of scripts under Unix and Windows

  • Numeric and text literals
  • Math operators and expressions
  • Scalar variables
  • Default values
  • Writing to standard output
  • Command line arguments
  • Reading from the standard input

  • About flow control
  • The if statement and Boolean values
  • Using unless and elsif
  • Statement modifiers
  • warn () and die ()
  • The conditional constructvUsing while loop and its variants
  • Using the for loop
  • Exiting from loops

  • The list data type
  • Accessing array elements
  • Creating arrays
  • List interpolation
  • Arrays and memory
  • Counting elements
  • Iterating through an array
  • List evaluation
  • Slices and ranges

  • File I/O overview
  • Opening a file
  • Reading text files
  • Writing to a text file
  • Arrays and file I/O
  • Using the <> operator

  • Growing and shrinking arrays
  • The split () function
  • Splitting on whitespace
  • Assigning to literal lists
  • The join () function
  • The sort () function
  • Alternate sort keys
  • Reversing an array

  • Using sprintf () and printf ()
  • Report formatting overview
  • Defining report formats
  • The write () function
  • Advanced filehandle magic

  • Hash overview
  • Creating hashes
  • Hash attributes
  • Traversing a hash
  • Testing for the existence of elements
  • Deleting hash elements

  • What is a reference?
  • The two ways to create references
  • References to existing data
  • References to anonymous data
  • Dereferencing scalar, array, and ash references
  • Dereferencing elements of arrays and hashes
  • Multidimensional arrays and other data structures

  • String length
  • The substr () function
  • The index () and rindex () functions
  • String replication
  • Pattern matching and substitution
  • Regular expressions

  • Opening and closing raw (binary) files
  • Reading raw data
  • Using seek () and tell ()
  • Writing raw data
  • Raw data manipulation with pack () and unpack ()

  • Understanding packages
  • Package and lexical variables
  • Localizing built-in variables
  • Declaring and calling subroutines
  • Calling subroutines
  • Passing parameters and returning values

  • Determining the current OS
  • Environment variables
  • Running external programs
  • User identification
  • Trapping signals
  • File test operators
  • Working with files
  • Time of day

  • Understanding $_
  • shift () with no array specified
  • Text file processing
  • Using grep () and Using map ()
  • Command-line options for file processing

  • Quoting in Perl
  • Evaluating arrays
  • Understanding qw ()
  • Getting more out of the <> operator
  • Read ranges of lines
  • Using m//g in scalar context
  • The /o modifier
  • Working with embedded newlines
  • Making REs more readable

Perl data conversion

  • Quoting in Perl
  • Evaluating arrays
  • Understanding qw ()
  • Getting more out of the <> operator
  • Read ranges of lines
  • Using m//g in scalar context
  • The /o modifier
  • Working with embedded newlines
  • Making REs more readable
  • Perl data conversion

  • The Perl library
  • Old-style library files
  • Perl modules
  • Modules bundled with Perl
  • A selection of modules
  • Getting modules from ActiveState
  • Getting modules from CPAN
  • Using Getopt: Long

  • Sending and receiving files with Net: FTP
  • Using File: Find to search for files and directories
  • Grabbing a web page
  • Some good places to find scripts
  • Perl man pages for more information
  • Zipping and unzipping files
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Who should attend

This course is appropriate for anyone who wants to create applications or modules to automate and simplify common tasks with Perl. This course is highly recommended for:
  • Cloud architects
  • Java developers
  • Cloud data engineers
  • Design engineers


Participants must have user-level knowledge of an operating system such as UNIX or Windows. While not mandatory, basic skills in at least one other programming language are desirable.

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