How do Map, Set, Array, and String expose their iterators? Are they the same object or different?

Q: How do Map, Set, Array, and String expose their iterators? Are they the same object or different?

Map and Set have `keys()`, `values()`, and `entries()` methods, each returning a distinct iterator. Array also has these methods. String's default iterator returns characters. The iterators are different objects with their own internal state.

Difficulty: 5/10

iterables, iterator protocol, built-in collections

Each built-in has a default iterator (`values()` for Map/Set, `values()` for Array, `Symbol.iterator` for String) and also provides `keys()` and `entries()` methods. They return different iterator objects.

Map and Set have keys(), values(), and entries() methods, each returning a distinct iterator. Array also has these methods. String's default iterator returns characters. The iterators are different objects with their own internal state.

Scenario Questions

0-2 years experience

Follow-up Questions

How do Map, Set, Array, and String expose their iterators? Are they the same object or different?

Difficulty: 5/10

iterables, iterator protocol, built-in collections

Each built-in has a default iterator (`values()` for Map/Set, `values()` for Array, `Symbol.iterator` for String) and also provides `keys()` and `entries()` methods. They return different iterator objects.

Scenario Questions

0-2 years experience

How do Map, Set, Array, and String expose their iterators? Are they the same object or different?

Each built-in has a default iterator (values() for Map/Set, values() for Array, Symbol.iterator for String) and also provides keys() and entries() methods. They return different iterator objects.

Scenario Questions

Follow-up Questions

How do Map, Set, Array, and String expose their iterators? Are they the same object or different?

Each built-in has a default iterator (values() for Map/Set, values() for Array, Symbol.iterator for String) and also provides keys() and entries() methods. They return different iterator objects.

Scenario Questions

Follow-up Questions

Each built-in has a default iterator (`values()` for Map/Set, `values()` for Array, `Symbol.iterator` for String) and also provides `keys()` and `entries()` methods. They return different iterator objects.

Each built-in has a default iterator (`values()` for Map/Set, `values()` for Array, `Symbol.iterator` for String) and also provides `keys()` and `entries()` methods. They return different iterator objects.