Chaining Pipelines and Avoiding Intermediate Lists with Sequence
Build multi-step pipelines and use Sequence for lazy evaluation.
The Problem: Intermediate Lists
Each collection operation (filter, map, etc.) creates a new list. For large collections or long chains, this wastes memory and time.
Eager vs Lazy Evaluation
Collection operations are eager: each step fully processes the list before the next. Sequence operations are lazy: processing one element through all steps before moving to the next.
All lessons in this course
- map and flatMap: Transforming Every Element
- filter, filterNot, and partition
- fold, reduce, and runningFold
- Chaining Pipelines and Avoiding Intermediate Lists with Sequence