Functional Programming & Streams
How streams really execute, parallel pitfalls, Optional discipline and the collector toolkit.
- 1✓
How does a stream pipeline actually execute? Explain laziness, short-circuiting and loop fusion.
senior🎬 animated - 2✓
When should you use parallel streams — and when are they a production incident waiting to happen?
staff - 3✓
What is Optional for — and what are the abuse patterns you'd flag in code review?
senior - 4✓
How do lambdas work under the hood? Functional interfaces, capture rules and invokedynamic.
staff - 5✓
Collectors deep-dive: groupingBy, toMap pitfalls, downstream collectors and writing your own.
senior