Results for “Promises & iteration protocols”
Small, practical examples. Search by task or narrow things down below.
Delegate iteration to another iterable
JavaScript: yield-star forwards items from another iterable while retaining generator composition.
JavaScript✓ Tested
Delegate iteration to another iterable
TypeScript: yield-star forwards items from another iterable while retaining generator composition.
TypeScript✓ Tested
Clean up a generator after an early break
JavaScript: Breaking a for-of loop closes a generator and runs its finally block.
JavaScript✓ Tested
Clean up a generator after an early break
TypeScript: Breaking a for-of loop closes a generator and runs its finally block.
TypeScript✓ Tested
Consume an asynchronous sequence
JavaScript: for await waits for each value of an async iterator in sequence.
JavaScript✓ Tested
Consume an asynchronous sequence
TypeScript: for await waits for each value of an async iterator in sequence.
TypeScript✓ Tested
Inspect both successful and failed promise results
JavaScript: allSettled preserves input order and reports failures without rejecting the combined promise.
JavaScript✓ Tested
Inspect both successful and failed promise results
TypeScript: allSettled preserves input order and reports failures without rejecting the combined promise.
TypeScript✓ Tested
Produce a lazy sequence with a generator
JavaScript: A generator yields one value per iteration without building an intermediate array.
JavaScript✓ Tested
Produce a lazy sequence with a generator
TypeScript: A generator yields one value per iteration without building an intermediate array.
TypeScript✓ Tested
Recover from an expected promise rejection
JavaScript: Return a fallback from catch so later handlers receive an ordinary resolved value.
JavaScript✓ Tested
Recover from an expected promise rejection
TypeScript: Return a fallback from catch so later handlers receive an ordinary resolved value.
TypeScript✓ Tested