JavaScript Sucks. Why So Many Variations of Looping Thru Array
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