Array.prototype.keys

🎓 Итерирующие методы массивов

entries()
every()
filter()
find()
findIndex()
flatMap()
forEach()

---

🎓 keys()

Генератор

Возвращает объект итератора

☕

document.cookie = "name=user"
document.cookie = "token=Jd7-js15/84"
document.cookie = "inerest=javascript"

var cookie = document.cookie.split ( "; " )
    .map (
        function ( item ) {
            return item.split ( "=" )
        }
    )

var iterator = cookie.keys()

var done = false
  
while ( !done ) {
    var next = iterator.next()
    done = next.done
    done ? null :
        console.log ( cookie[ next.value ] )
}

---

map()
reduce()
reduceRight()
some()
sort()
values()