11th of 38 Questions.
How does Array.from() use the iterator protocol? What's the difference between passing an iterable vs an array-like object?
Array.from() first checks if the object has a Symbol.iterator method. If yes, it uses the iterator protocol; otherwise, it falls back to array-like properties (length and indexed elements).
Array.from() can consume both iterables (e.g., Map, Set, generators) and array-like objects (e.g., arguments, NodeList). For iterables, it calls [Symbol.iterator]() and collects values. For array-like objects, it uses the length property and numeric indices. This dual behavior makes Array.from() versatile for converting various structures to arrays.