Arrays & Array Methods (map, filter, reduce)

What design pattern is demonstrated in this code?

const operations = [
  nums => nums.filter(n => n > 0),
  nums => nums.map(n => n * 2),
  nums => nums.reduce((a, b) => a + b, 0)
];
const result = operations.reduce((data, fn) => fn(data), [-2, 1, 3, -4, 5]);

Observer pattern
Factory pattern
Pipeline pattern
This demonstrates the pipeline pattern: 1) Each function represents a transformation step, 2) reduce() composes operations sequentially, 3) Output of each step becomes input for next, 4) Maintains functional programming principles, 5) Enables modular and reusable transformations, 6) Easy to add or remove processing steps, 7) Common pattern in data processing workflows, 8) Similar to Unix pipe operations.
Singleton pattern

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