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Kingdom of Saudi Arabia ةيدوعسلا ةيبرعلا ةكلمملا Ministry of Education ميلعتلا ةرازو
Umm AlQura University ىرقلا مأ ةعماج
Adham University College مضأب ةيعماجلا ةيلكلا
Computer Science Department للآا بساحلا مسق
Programming Languages Course 6803331-4, Chapter Six
Summer Semester of 2018 Academic Year
Associative Arrays
Adding, Accessing and Removing Elements from Perl’s Hashes
Creating a Hash:
#There is more than one way to create a Hash or what’s called an Associative Array in Perl.
$teachers{'Mariah'} = 24;
$teachers{'Lisa'} = 30;
#Another way
%teachers = ('Mariah' => 24, 'Lisa'=> 30);
#Also
%teachers = ('Mariah', 24, 'Lisa', 30);
Accessing a Hash Element:
%teachers = ('Mariah' => 24, 'Lisa'=> 30);
#Simply we can access to an element as this:
print "\Teacher1Age = $teachers{'Mariah'}\n";
print "\Teacher2Age = $teachers{'Lisa'}\n";
The Output:
Teacher1Age = 24 Teacher2Age = 30
Add a Hash Element:
%teachers = ('Mariah' => 24, 'Lisa'=> 30);
print "\Teacher1Age = $teachers{'Mariah'}\n";
print "\Teacher2Age = $teachers{'Lisa'}\n";
#Simply we can add an element as this:
$teachers{'Othman'}=60;
print "\Teacher3Age = $teachers{'Othman'}\n";
The Output:
Teacher1Age = 24 Teacher2Age = 30 Teacher3Age = 60
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Kingdom of Saudi Arabia ةيدوعسلا ةيبرعلا ةكلمملا Ministry of Education ميلعتلا ةرازو
Umm AlQura University ىرقلا مأ ةعماج
Adham University College مضأب ةيعماجلا ةيلكلا
Computer Science Department للآا بساحلا مسق
Delete a Hash Element:
%teachers = ('Mariah' => 24, 'Lisa'=> 30);
print "\Teacher1Age = $teachers{'Mariah'}\n";
print "\Teacher2Age = $teachers{'Lisa'}\n";
$teachers{'Othman'}=60;
print "\Teacher3Age = $teachers{'Othman'}\n";
#Simply by the keyword delete:
delete $teachers{'Othman'};
print "\Teacher3Age = $teachers{'Othman'}\n";
The Output:
Teacher1Age = 24 Teacher2Age = 30 Teacher3Age = 60 Teacher3Age =
Reference:
https://www.tutorialspoint.com/perl/perl_hashes.htm
Remember,“Success is 1% inspiration and 99% perspiration”😉 If you have any questions, feel free to ask me through my email
T.Mariah Sami Ahmed Khayat Teacher Assistant @ Adam University College
