Demonstration of some facilities of lists

Lists example from a Well House Consultants training course
More on Lists [link]

This example is described in the following article(s):
• Fresh Perl Teaching Examples - part 2 of 3 - [link]

Source code: dins Module: P208

# Set up the whole of a list

@din = ("Cottage Pie","Cottage Pie","Mixed Grill",
        "Haddock","Pie, Peas and Pear sauce");

# Add something to the end of the whole list
push @din,"BitRab Pie";

# Change a MEMBER of the list, so $ not @
$din[2] .= " with peanut butter";

# Context -
# listish - output whole list
# double quotes - space separated text string
# scalar - the number of elements in the list

print @din,"\n";
print "@din\n";
print @din+0,"\n";

push @din,"Latvian Salami";

# Sort the list returning a new list which you
# iterate through in order

foreach $order(sort @din) {
        print "A portion of $order with chips\n";
        }

# Iterating through a list using the index
# You need to do this if you need to know the position

for ($k=0; $k<@din; $k++) {
        print "At $k, we have $din[$k]\n";
        }

__END__

Sample output:

Dorothy-2:j10p grahamellis$ perl dins
Cottage PieCottage PieMixed Grill with peanut butterHaddockPie,
Peas and Pear sauceBitRab Pie
Cottage Pie Cottage Pie Mixed Grill with peanut butter Haddock Pie,
Peas and Pear sauce BitRab Pie
6
A portion of BitRab Pie with chips
A portion of Cottage Pie with chips
A portion of Cottage Pie with chips
A portion of Haddock with chips
A portion of Latvian Salami with chips
A portion of Mixed Grill with peanut butter with chips
A portion of Pie, Peas and Pear sauce with chips
At 0, we have Cottage Pie
At 1, we have Cottage Pie
At 2, we have Mixed Grill with peanut butter
At 3, we have Haddock
At 4, we have Pie, Peas and Pear sauce
At 5, we have BitRab Pie
At 6, we have Latvian Salami
Dorothy-2:j10p grahamellis$

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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

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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.

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