Functional Programming in JavaScript

  1. Practical Application Patterns
    1. Code Organization Strategies
      1. Module Structure
        1. Function Grouping
          1. Pure vs Impure Separation
          2. State Management Patterns
            1. Immutable State Trees
              1. State Transformation Functions
                1. Event Sourcing Concepts
                2. Testing Functional Code
                  1. Pure Function Testing
                    1. Property-Based Testing
                      1. Mock-Free Testing
                        1. Test Data Generation
                        2. Performance Considerations
                          1. Immutability Overhead
                            1. Function Call Costs
                              1. Memory Usage Patterns
                                1. Optimization Strategies
                                2. Migration Strategies
                                  1. Gradual Adoption
                                    1. Legacy Code Integration
                                      1. Team Training Approaches
                                        1. Refactoring Techniques

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                                      12. Functional Programming Libraries

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                                      14. Advanced Functional Concepts