| |||||||||||
| |||||||||||
Setting up, using and looping through a list
Lists example from a Well House Consultants training course
More on Lists [link]
Source code: back Module: P208
# Setting up, using and looping through a list
@places = ("Melksham","Farnborough","Melksham","Westbury","Swindon"); # Here's an alternative - exactly the same thing! @places = qw%Melksham Farnborough Melksham Westbury Swindon%; print @places,"\n"; # print a list ("List context") print "@places\n"; # Expand a list within a string ("Double Quote Context") print @places+0,"\n"; # print a list length ("Scalar context") print "Saturday in ",$places[3],"\n"; $places[2] = "Chippenham"; print "@places\n"; # Expand a list within a string ("Double Quote Context") $places[5] = "Bradford-on-Avon"; print "@places\n"; # Expand a list within a string ("Double Quote Context") push @places,"Trowbridge"; # ways of looping through a list $p = 0; while ($p < @places) { print "Have a ping for me in $places[$p]\n"; $p++; } $p = 0; while ($p <= $#places) { print "Have a pint for me in $places[$p]\n"; $p++; } $p = 0; while ($p < scalar(@places)) { print "Have a pee for me in $places[$p]\n"; $p++; } for ($p = 0; $p < scalar(@places); $p++) { print "Have a pie for me in $places[$p]\n"; } foreach $pl (@places) { print "Have a party for me in $pl\n"; } __END__ Sample output: munchkin:q grahamellis$ perl back MelkshamFarnboroughMelkshamWestburySwindon Melksham Farnborough Melksham Westbury Swindon 5 Saturday in Westbury Melksham Farnborough Chippenham Westbury Swindon Melksham Farnborough Chippenham Westbury Swindon Bradford-on-Avon Have a ping for me in Melksham Have a ping for me in Farnborough Have a ping for me in Chippenham Have a ping for me in Westbury Have a ping for me in Swindon Have a ping for me in Bradford-on-Avon Have a ping for me in Trowbridge Have a pint for me in Melksham Have a pint for me in Farnborough Have a pint for me in Chippenham Have a pint for me in Westbury Have a pint for me in Swindon Have a pint for me in Bradford-on-Avon Have a pint for me in Trowbridge Have a pee for me in Melksham Have a pee for me in Farnborough Have a pee for me in Chippenham Have a pee for me in Westbury Have a pee for me in Swindon Have a pee for me in Bradford-on-Avon Have a pee for me in Trowbridge Have a pie for me in Melksham Have a pie for me in Farnborough Have a pie for me in Chippenham Have a pie for me in Westbury Have a pie for me in Swindon Have a pie for me in Bradford-on-Avon Have a pie for me in Trowbridge Have a party for me in Melksham Have a party for me in Farnborough Have a party for me in Chippenham Have a party for me in Westbury Have a party for me in Swindon Have a party for me in Bradford-on-Avon Have a party for me in Trowbridge munchkin:q grahamellis$ Learn about this subject
This module and example are covered on the following public courses:
* Perl Programming * Perl bootcamp * Learning to program in Perl * Perl Programming Also available on on site courses for larger groups Books covering this topic
Yes. We have over 700 books in our library. Books
covering Perl are listed here and when you've selected a
relevant book we'll link you on to Amazon to order.
Other Examples
This example comes from our "Lists" training module. You'll find a description of the topic and some
other closely related examples on the "Lists" module index page.
Full description of the source code
You can learn more about this example on the training courses listed on this page,
on which you'll be given a full set of training notes.
Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License. Other resources
• Our Solutions centre provides a number of longer technical articles.
• Our Opentalk forum archive provides a question and answer centre. • The Horse's mouth provides a daily tip or thought. • Further resources are available via the resources centre. • All of these resources can be searched through through our search engine • And there's a global index here. Purpose of this website
This is a sample program, class demonstration or answer from a
training course. It's main purpose
is to provide an after-course service to customers who have attended our
public private or
on site courses, but the examples are made
generally available under conditions described below.
Web site author
Conditions of use
Past attendees on our training courses are welcome to use individual
examples in the course of their programming, but must check
the examples they use to ensure that they are suitable for their
job. Remember that some of our examples show you how not to do
things - check in your notes. Well House Consultants take no responsibility
for the suitability of these example programs to customer's needs.
This program is copyright Well House Consultants Ltd. You are forbidden from using it for running your own training courses without our prior written permission. See our page on courseware provision for more details. Any of our images within this code may NOT be reused on a public URL without our prior permission. For Bona Fide personal use, we will often grant you permission provided that you provide a link back. Commercial use on a website will incur a license fee for each image used - details on request. |
| ||||||||||
PH: 01144 1225 708225 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho PAGE: http://www.wellho.net/resources/ex.php • PAGE BUILT: Sun Oct 11 14:50:09 2020 • BUILD SYSTEM: JelliaJamb |