Message from JavaScript discussions

September 2017

— The problem is hasOwnProperty is slow on objects, but what about Arrays? Maybe index in arr is faster

—

Oki guys, a question for you without looking up the reason.

null > 0 //false
null === 0 //false
null >= 0 //true

Why

— Coercion, null coerces to false and false coerces to 0, that gives answer to 1 and 3

— === checks value as well as type

— Null == 0 is false as well.

— null == 0 but typeof null != typeof 0,

Edit: null != 0

— Null != 0, cool

— Don't know why though, need to have a look

— I hadn't even thought of it. Came to know of it from a blog a friend had written. Thought you guys would like to know :)

— Https://blog.campvanilla.com/javascript-the-curious-case-of-null-0-7b131644e274

The blog. Not a plug.

— When you use Object.getOwnPropertyNames(array) you actually know 'something' (even undefined) is on that position.

— How slow is that