Functional Programming in JavaScript

  1. Immutability in JavaScript
    1. Mutability vs Immutability
      1. Mutable Data Problems
        1. Immutable Data Benefits
          1. Performance Considerations
          2. Immutable Array Operations
            1. Adding Elements
              1. Spread Operator Usage
                1. concat Method
                  1. unshift Alternatives
                  2. Removing Elements
                    1. slice Method
                      1. filter Method
                        1. Avoiding splice
                        2. Updating Elements
                          1. map Method
                            1. Index-based Updates
                            2. Combining Arrays
                              1. Spread Operator
                                1. concat Method
                              2. Immutable Object Operations
                                1. Adding Properties
                                  1. Object.assign Usage
                                    1. Spread Operator
                                    2. Updating Properties
                                      1. Spread with Overrides
                                        1. Nested Property Updates
                                        2. Removing Properties
                                          1. Destructuring with Rest
                                            1. Object.keys with reduce
                                          2. Deep vs Shallow Immutability
                                            1. Shallow Copy Limitations
                                              1. Deep Copy Techniques
                                                1. Nested Structure Handling
                                                  1. Performance Trade-offs

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                                                3. Pure Functions and Side Effects

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                                                5. Array Methods and Higher-Order Functions