"Perl for Perl Newbies" - Part 2

Contents

• 1. The for Loop
  • 1.1. Behaviour of next in the for Loop
  • 1.2. Whence for?
• 2. Hashes
  • 2.1. Hash-Related Functions
• 3. Declaring Local Variables with "my"
  • 3.1. "use strict", Luke!
  • 3.2. "use warnings", Luke!
• 4. Functions
  • 4.1. Function Recursion
  • 4.2. Use of "shift" in Functions
• 5. File Input/Output
  • 5.1. Using "print" with Files
  • 5.2. The <FILEHANDLE> Operator
• 6. The @ARGV Array
• 7. Regular Expressions
  • 7.1. Syntax
  • 7.2. ".", "[ ... ]"
  • 7.3. The "*" and Friends
  • 7.4. Grouping
  • 7.5. Alternation with "|"
  • 7.6. Binding to the Beginning or the End of a String
  • 7.7. Substituting using Regular Expressions
    • 7.7.1. The "e" Switch
    • 7.7.2. Ungreedy Matching with *? and Friends
  • 7.8. Useful Flags
  • 7.9. Useful Escape Sequences
  • 7.10. The Next Step
• 8. String Interpolation
• 9. Useful Functions
  • 9.1. split
  • 9.2. map
  • 9.3. sort
    • 9.3.1. <=> and cmp
  • 9.4. grep
• 10. References
  • 10.1. Example: The Towers of Hanoi
  • 10.2. \ - Taking a Reference to an Existing Variable
  • 10.3. [ @array ] - a Dynamic Reference to an Array
  • 10.4. { %hash } - a Dynamic Reference to a Hash
  • 10.5. The Arrow Operators
  • 10.6. Dereferencing
• 11. Using the perl Debugger
  • 11.1. Stepping over and Stepping in
  • 11.2. Setting Breakpoints and Continuing
  • 11.3. Executing Perl Commands inside the Debugger
  • 11.4. Getting More Information
• 12. Finale

Licence

To the extent possible under law, Shlomi Fish has waived all copyright and related or neighboring rights to Perl for Perl Newbies. This work is published from Israel.