detect "null"

[Christoph Hart]

@ulrik I just skimmed through the JUCE codebase and the only time where null is used is when you convert a JSON object with a void field to a string (which would be the case if you do something like Console.print(trace(array) command). I guess that's just for compatibility reasons with the JSON standard and it is still being typed internally as void. I can't say why it is behaving like that with an inf number though, as this is clearly a number type and should be treated as such (eg. isDefined(1.0/0.0) returns true).

However I got this output:

so apparently assigning void to a field is the same as assigning undefined (which I thought were two different things), however the isDefined() check works correctly on all of them.

BTW, using inf as literal is not protected, so you can do stuff like:

var inf = 90;
Console.print(inf);

[ustk]

@Christoph-Hart Is it normal that a[2] set to null is throwing undefined ? It's weird to me because it is actually defined as null...

EDIT: I think I have my answer...

https://stackoverflow.com/questions/5076944/what-is-the-difference-between-null-and-undefined-in-javascript

console.log(null === undefined) // false (not the same type)
console.log(null == undefined) // true (but the "same value")

[ulrik]

@ustk