<?php // Example of a hash of hashes in Perl my %data = ( 'student1' => { 'name' => 'Alice', 'age' => 20 }, 'student2' => { 'name' => 'Bob', 'age' => 22 }, 'student3' => { 'name' => 'Charlie', 'age' => 19 } ); // Accessing the data foreach my $key (keys %data) { print "Name: " . $data{$key}{'name'} . ", Age: " . $data{$key}{'age'} . "<br>"; } ?>
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?