What does the -> arrow do in Perl?

by

See The Arrow Operator in perlop:

“->” is an infix dereference operator, just as it is in C and C++. If the right side is either a [...], {...}, or a (...) subscript, then the left side must be either a hard or symbolic reference to an array, a hash, or a subroutine respectively. (Or technically speaking, a location capable of holding a hard reference, if it’s an array or hash reference being used for assignment.) See perlreftut and perlref.

Otherwise, the right side is a method name or a simple scalar variable containing either the method name or a subroutine reference, and the left side must be either an object (a blessed reference) or a class name (that is, a package name). See perlobj.

More Related Contents:

  1. Remove Text between two Strings
  2. Convert Bash script to Perl/VBS/any other windows compatible language [closed]
  3. Redirecting the perl script
  4. How can I troubleshoot my Perl CGI script?
  5. Why are Perl 5’s function prototypes bad?
  6. How is Perl’s @INC constructed? (aka What are all the ways of affecting where Perl modules are searched for?)
  7. How can I install Perl modules without root privileges?
  8. How do I compare two strings in Perl?
  9. What is the difference between ‘my’ and ‘our’ in Perl?
  10. Difference between &function and function() in perl [duplicate]
  11. How do you round a floating point number in Perl?
  12. Why are Perl source filters bad and when is it OK to use them?
  13. Why do I have to specify the -i switch with a backup extension when using ActivePerl?
  14. Perl 5.20 and the fate of smart matching and given-when
  15. How can I run Perl system commands in the background?
  16. Why is this program valid? I was trying to create a syntax error
  17. How can I convert the stringified version of array reference to actual array reference in Perl?
  18. Find size of an array in Perl
  19. In Perl, how do I change, delete, or insert a line in a file, or append to the beginning of a file?
  20. In Perl, how can I find the index of a given value in an array?
  21. How can I run a system command in Perl asynchronously?
  22. What is the meaning of @_ in Perl?
  23. How can I calculate the number of days between two dates in Perl?
  24. Which framework should I use to write modules? [closed]
  25. How do I capture Perl’s STDOUT in a variable?
  26. Is object oriented exception handling in Perl worth it?
  27. How can I check whether my Perl installation is 32 or 64 bit?
  28. What decides the order of keys when I print a Perl hash?
  29. Converting relative path into absolute path?
  30. How can I take screenshots of webpages with Perl?

Leave a Comment