JS: Map.prototype.entries

(new in JS: ECMAScript 2015)

mapObj.entries()

• Return a Generator for the map.
• Each yield is a array of the form [key, value].

• Map.prototype.entries is the same as Map.prototype[Symbol.iterator]
• This means, map object itself is already iterable using exactly the same iterator.
• So this method is redundant.

console.log(Map.prototype.entries === Map.prototype[Symbol.iterator]);

• JS: Symbol Tutorial