🔸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) ❗
⚖️ 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.
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