JavaScript Sucks. Variations of Looping Thru Array (2025)

JavaScript Complexity. Why You Have So Many Variations of Looping Thru Array.

Half of them are pitfalls.

• Very annoying property attribute the enumerable.
• It is there because the bad design of no real array type, because arrays are actually just objects with integer as keys.
• so in object keys, you need a way to differentiate the keys that is meant as array index.

• then, the incomptence of object key can only be string type.
• so symbol keys is invented to prevent key collision.

• then, before, the only way to loop thru array is via for-in loop, which has the bad design of going thru all keys in the entire parent chain.

• that is why you have so many variations of looping thru array.
• Half of them are pitfalls.

• full detail, see

• JS: List Properties