Functional Programming in JavaScript
Mutable Data Problems
Immutable Data Benefits
Performance Considerations
Spread Operator Usage
concat Method
unshift Alternatives
slice Method
filter Method
Avoiding splice
map Method
Index-based Updates
Spread Operator
Object.assign Usage
Spread with Overrides
Nested Property Updates
Destructuring with Rest
Object.keys with reduce
Shallow Copy Limitations
Deep Copy Techniques
Nested Structure Handling
Performance Trade-offs
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3. Pure Functions and Side Effects
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5. Array Methods and Higher-Order Functions