🔸array object property

🚧 under construction

JS ⟩ object ⟩ built-in ⟩ Array ⟩ access ⟩ array object property

(value)

if you set / access the Array via anything other than nonnegative integers, you'll end up setting / accessing one of the array's object properties, which are stored differently from the list of element(s) ❗

⭐️ 重點

⚖️ array object properties vs. array elements

• thery are separate❗

• array's traversal and mutation operations cannot be applied to these named properties.

setting / accessing via anything other than nonnegative integers：

• will not set / retrieve an array element

• will set / access one of the array's object properties.

👥 相關

📗 參考

📘 手冊

• JavaScript data types and data structures ⟩ Properties