From the course: Node.js: Design Patterns

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The Strategy pattern

The Strategy pattern - Node.js Tutorial

From the course: Node.js: Design Patterns

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The Strategy pattern

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- [Instructor] One of the most powerful and most dynamic design patterns is the strategy. The strategy pattern let's you create multiple algorithms for a specific task and then dynamically decide upon which algorithm to use at run time. An example of a common place that the strategy pattern is used is with payment processing. We could build a shopping cart and checkout process that only let's users make purchases via a credit card. In this case the checkout process would always use the same algorithm, the credit card payment. We could also modify the checkout process to implement a strategy. This means that we decouple how to handle payments from the process itself. Now we can add different strategies for handling payments. We could add a credit card strategy and a PayPal strategy and then let the user decide which one to use dynamically at run time. The cool thing about strategies is that we can add new strategies as the…

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