FunctionalProgrammingadvanced

Compose map, filter, and reduce

📖 Usage Example

const result = [1, 2, 3, 4, 5]
  .filter(x => x % 2 === 0)
  .map(x => x * 10)
  .reduce((sum, x) => sum + x, 0);
// 60

Compose map, filter, and reduce in a chain to build expressive data pipelines.

Combining Higher-Order Functions

Use map, filter, and reduce together to solve complex transformations.

Challenge: Given an array of numbers, filter even numbers, map them to their squares, then reduce to sum.

💡 Hints (4)

24/25