Scene comparison with null in Godot-v3.3.4.

z80

Hello!

I've been using null with a variable comparison in v3.2.2 no problem.

if part != null:
    part.process_single() # Here Godot 3.2.2 is fine but 3.3.4 
    # complains that I'm trying to call a method of a **null** instance.

Recently upgraded to v3.3.4, and all such places in the code don't work anymore. When I hover the mouse over part in the code above, Godot says Null. But comparison with null doesn't work anymore.

Is it a bug or a feature?

And if it is the feature, what null constant can be used for if a comparison of a variable equal to null with null constant is equal to false no matter what from now on?

z80

Sorry, I created the comment by mistake. Could't fine edit button for the very top post.

cybereality

That should work fine. I just tried it. Here are some of the ways you can write that logic:

var obj = null
if obj == null:
	print("obj is null")
if not obj:
	print("obj is null")
if !obj:
	print("obj is null")
	
obj = "Something"
if obj != null:
	print("obj is NOT null")
if not obj == null:
	print("obj is NOT null")
if obj:
	print("obj is NOT null")

The last one is usually what I use because it is less code and more clear. So for you it would be:

if part:
	part.process_single()

DaveTheCoder

If part is an Object, it's normally better to use is_instance_valid(part) instead of comparing it with null.