JavaScript Generators and Iterators

Generators create iterable sequences with lazy evaluation. Here's how to use them effectively.

Generator for State Management#

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Real-World Example: Pagination#

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Best Practices#

When to use:
✓ Large or infinite sequences
✓ Lazy evaluation needed
✓ Custom iteration logic
✓ Async data streams

Performance:
✓ Use for lazy evaluation
✓ Avoid for small fixed arrays
✓ Clean up with return()
✓ Handle errors properly

Patterns:
✓ Combine with async/await
✓ Use yield* for delegation
✓ Create reusable utilities
✓ Implement Symbol.iterator

Generators enable lazy evaluation and custom iteration. Use them for large datasets, infinite sequences, and async streams. Combine with utility functions like map, filter, and take for powerful data processing pipelines.

JavaScript Generators and Iterators

Basic Generators#

Infinite Sequences#

Passing Values to Generators#

Generator Delegation#

Custom Iterables#

Async Generators#

Generator Utilities#

Lazy Evaluation#

Generator for State Management#

Error Handling#

Best Practices#

Conclusion#

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