Strategy Design Pattern
lets the algorithm vary independently from clients that use it
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lets the algorithm vary independently from clients that use it
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When you want to define a class that will have one behavior that is similar to other behavior in the list.
When you need to use one of the several behaviors dynamically
Identify the aspects of your application that vary and separate them from what stays the same.
Often reduces the long list of conditionals
Reduce duplicate code
Keeps class changes from forcing other class changes
can hide complicated/secret code from the user
You can replace inheritance with composition.
Increased number of objects and classes
A lot of modern programming languages have functional-type support that lets you implement different versions of an algorithm inside a set of anonymous functions. Then you could use these functions exactly as you’d have used the strategy objects, but without bloating your code with extra classes and interfaces.
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The pattern can be implemented with a simple anonymous (lambda) function in most modern programming languages.