This article explains why the destructuring statement var [a, b] = {a:1, b:2} throws a TypeError, explores the iterator protocol and Symbol.iterator, and shows how redefining Object.prototype[Symbol.iterator] enables the object to be iterable so the destructuring succeeds.
The article explains why the destructuring statement var [a, b] = {a: 1, b: 2} throws a TypeError, details the iterator requirement for the left‑hand side, and shows how to add a Symbol.iterator method to Object.prototype so any object becomes iterable and the assignment succeeds.
This article explains Python magic (dunder) methods, their purposes, common examples such as __init__, __str__, __repr__, __len__, __getitem__, __setitem__, __delitem__, __iter__, __call__, __add__, __eq__, __hash__, and shows how to implement operator overloading, iterator and context‑manager protocols while discussing naming rules, performance, inheritance, type checking, and limitations.
