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Functional Programming Tricks That Work Well in JavaScript
- Functional programming in JavaScript heavily relies on closures and memory management behind the scenes, especially in methods like map, filter, and reduce.
- Functions passed into map, filter, or reduce carry a 'memory' (closure) of the variables from the environment in which they were created.
- Map creates a new array by applying a function to each item, maintaining access to variables via closures.
- Filter tests and decides whether to keep items based on a function's result, benefitting from closure to hold onto external variables.
- Reduce accumulates a single result by passing an accumulator through each step with closure maintaining outside values.
- JavaScript's reference-based memory model for arrays and objects encourages immutability to avoid unexpected side effects.
- Immutability involves creating new objects based on the original, preventing shared memory changes and enhancing data predictability.
- Immutable patterns allow for safer data manipulation by controlling shared memory creation.
- Functional programming concepts naturally align with closures, references, and immutability in JavaScript for cleaner and more predictable code.
- By understanding these concepts, using map, filter, reduce, and immutable patterns becomes a natural and effective way of working in JavaScript.
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