Size of undefined and null

Question

May I ask a size of undefined or null on a variable, which is bigger in javascript??

a = undefined

b = null

a > b ? undefined is bigger : null is bigger

I am sorry, I dont very understand your question. I want to know the size in js — Micah, Jan 25 '13 at 11:15
Check this [topic](http://stackoverflow.com/questions/6499352/does-null-occupy-memory-in-javascript) — Miguel Matos, Jan 25 '13 at 11:16
It has no sense ask for the size of undefined or null variable... what is your point? — Miguel Prz, Jan 25 '13 at 11:19
@MiguelMatos : he asked which one is bigger, not what is the bigger memory footprint of the two. — janesconference, Jan 25 '13 at 11:44

janesconference · Accepted Answer · 2013-01-25T12:34:25.970

6

Types are incomparable. Thus, neither a nor b is the biggest:

> var a = undefined
undefined
> a
undefined
> var b = null
undefined
> b
null
> a > b
false
> b > a
false

(source: Developer Tools' console)

edit: if you're asking about the memory footprint, it depends on the implementation of the Javascript Engine you're using.

edited Jan 25 '13 at 12:34

answered Jan 25 '13 at 11:42

janesconference

1 Answers1