Support for dispatch tables in Perl has evolved over the years, enhancing their usability and efficiency for developers. Dispatch tables are often used to map strings or keys to corresponding subroutines, enabling cleaner and more maintainable code. In recent versions of Perl, improvements have been made regarding performance and ease of setup, making them a more attractive solution for various programming scenarios.
my %dispatch = (
'foo' => sub { return 'You called foo'; },
'bar' => sub { return 'You called bar'; },
'baz' => sub { return 'You called baz'; },
);
my $action = 'foo';
if (exists $dispatch{$action}) {
print $dispatch{$action}->(); # Executes the subroutine corresponding to 'foo'
} else {
print "Action not found!";
}
How do I avoid rehashing overhead with std::set in multithreaded code?
How do I find elements with custom comparators with std::set for embedded targets?
How do I erase elements while iterating with std::set for embedded targets?
How do I provide stable iteration order with std::unordered_map for large datasets?
How do I reserve capacity ahead of time with std::unordered_map for large datasets?
How do I erase elements while iterating with std::unordered_map in multithreaded code?
How do I provide stable iteration order with std::map for embedded targets?
How do I provide stable iteration order with std::map in multithreaded code?
How do I avoid rehashing overhead with std::map in performance-sensitive code?
How do I merge two containers efficiently with std::map for embedded targets?