ActionScript 3.0 Design Patterns.pdf - VideoTutorials-bg.com

Decorating with Deadly Sins and Heavenly Virtues
Action gaming pits different kinds of heroes and villains against one another, and the
combatants have different weapons and shields. That is, they’re decorated with different
characteristics and abilities. In order to see how to add some more functions to
a Decorator pattern, what could be more appropriate than pitting good against evil?
Table 4-1 shows a list of deadly sins and heavenly virtues. (The list is considerably
updated from Dante’s Inferno and Prudentius’ epic poem, Psychomachia, both of
whom I understand were using Commodore-64’s to make their lists.)
Table 4-1. Decorations of good and evil
Deadly Sin Description Virtue Description
Rage Uncontrolled anger—striking out at
syntax errors
Malice Meanness, malevolence, ill will, cruelty,
and hatred toward others–unkind
remarks about Linux.
Obfuscation Hiding the truth— redefining an act,
knowledge by adding confusion—coding
without comments
Arrogance Excessive pride, not considering others’
beliefs, feelings, or knowledge—belief
that Microsoft Windows is the only real OS
Prejudice Judging others on the basis of stereotypes
and not their actions—teasing Mac users
Dogmatisms Narrow, inflexible belief even in light of
evidence to the contrary—continue to
use procedural programming methods
Indifference Seeing suffering and doing nothing or not
even caring to help—unwilling to offer
help in learning OOP
Thinking about what has been presented so far in this chapter, the first thing that
comes to mind is a property that describes each of the deadly sins and heavenly virtues.
That’s easy enough, because just like the paper doll example, all we have to do
is to assign a property value to each decorator. However, we can do more with the
Decorator design pattern, as you’ll see in the next two sections.
148 | Chapter 4: Decorator Pattern
Compassion Caring about others—Helping procedural
programmers transition to OOP
Courage Doing the right thing regardless of the
danger—taking on object-oriented programming
Hope Belief in eventual success of good over
evil—you really can complete the project on
time
Justice A fair balance and even chance—using
Windows, Mac OS, and Linux
Openness Capacity to consider new knowledge, ideas,
and contrary ideas—writing a program on a
Mac
Integrity Maintaining values even when tempted to
abandon them for short term gains—foregoing
hacks even though they’d get the job
done and the client would never know
Diligence Willingness to stick with an especially difficult
task to complete it—learning design
patterns