Grokking Node.js Design Patterns for Interviews

Solution: Create a Feature-Flagged Analytics Service

Understand how to implement a factory that produces either a real or stub analytics service based on feature flags, ensuring safe method calls regardless of analytics availability.

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Solution explanation
Revisit the problem statement

1.Introduction to Node.js Patterns

2.Factory Pattern: Generate Config-Driven Services Dynamically

3.Builder Pattern: Assemble Complex Objects with Fluent APIs

4.Decorator Pattern: Extend Behavior Without Modifying Core Logic

5.Adapter Pattern: Standardize Interface Across Dependencies

6.Proxy Pattern: Intercept and Control Access Transparently

7.Strategy Pattern: Swap Algorithms Based on Context

8.Wrapping Up

Solution: Create a Feature-Flagged Analytics Service

Solution