STRATEGY

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STRATEGY
Object Behavioral Pattern
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You are at the Pub two weeks before Fall Formal
and still dont have a date! All of a sudden a
girl who you had a crush on during o-week walks in
There are many different ways that you could
approach this situation. Each approach requires
a different methodology, but achieves the same
goal (i.e. you have confronted your crush)
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How you doin?
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Do you believe in love at first sight or should I
walk around the room again?
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Intent of Strategy

• Define a family of algorithms, encapsulate each
  one, and make them interchangeable
• Strategy provides a common interface for all
  encapsulated algorithms and allows the algorithm
  to vary independently of the client

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When is Strategy used?

• When many related classes differ only in their
  behavior
• Different variants of an algorithm exist in order
  to reflect different space/time trade-offs

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Structure
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Airline Ticket Reservations

• There are many different ways to obtain an
  airline ticket. Depending on your utility for
  time and money, you may be looking for the
  cheapest flight available or you might want to
  find the quickest flight to your destination.

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Airline Ticket Reservations