Array.prototype.entries()

Il metodo entries() restituisce un nuovo oggetto Array Iterator contenente delle coppie chiave/valore per ogni indice presente nell'array.

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a.entries()

Un nuovo oggetto iterator Array.

var a = ['a', 'b', 'c'];
var iterator = a.entries();

for (let e of iterator) {
  console.log(e);
}
// [0, 'a']
// [1, 'b']
// [2, 'c']

• Array.prototype.keys()
• Array.prototype.values()
• Array.prototype.forEach()
• Array.prototype.every()
• Array.prototype.some()
• for...of
• Iteration protocols