Basic HTML version of Foils prepared Sept 20 97

Foil 37 A Hash of Arrays in class HTML::FormatPS

From Perl5 and Advanced Perl4 Features Computational Science for Information Age Course CPS616 -- Sept 20 97. by Geoffrey C. Fox,Nancy McCracken,Tom Scavo
# We show this example of $PaperSizes{}[] which is a Hash whose key references a 2D array
%PaperSizes =
(
A3 => [mm(297), mm(420)], # mm is built in subroutine
A4 => [mm(210), mm(297)], # to convert millimeteres to points
);
so $PaperSizes{'A4'} returns a two dimensional array

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