bullet | JVM Bullet Physics SDK : real-time collision detection | Game Engine library

It's because final fields are guaranteed to be visible to other threads only after the object construction while the visibility of writes to volatile fields are guaranteed without any additional conditions.

From jls-17, on final fields:

An object is considered to be completely initialized when its constructor finishes. A thread that can only see a reference to an object after that object has been completely initialized is guaranteed to see the correctly initialized values for that object's final fields.

on volatile fields:

A write to a volatile variable v (§8.3.1.4) synchronizes-with all subsequent reads of v by any thread (where "subsequent" is defined according to the synchronization order).

Now, regarding your specific code example, JLS 12.5 guarantees that field initialization occurs before the code in your constructor is executed (see steps 4 and 5 in JLS 12.5, which is a bit too long to quote here). Therefore, Program Order guarantees that the constructor's code will see map initialized, regardless of whether it's volatile or final or just a regular field. And since there's a Happens-Before relation before field writes and the start of a thread, even the thread you're creating in the constructor will see map as initialized.

Note that I specifically wrote "before code in your constructor is executed" and not "before the constructor is executed" because that's not the guarantee JSL 12.5 makes (read it!). That's why you're seeing null in the debugger before the first line of the constructor's code, yet the code in your constructor is guaranteed to see that field initialized.

Alright so I ended up using the table method, I'm not sure why I didn't think of this earlier but we can just split the list of names in half and append them in such a way that the second half of names is appended to the same row as the first half of names. Here is essentially what I did:

The problem is that your addEvent bind the click hander on the body and not on the h3. And the second is that you do e.preventDefault when you have not defined e (you should set it on the click handler,not the addEvent function) which causes an error and stops the execution.

If you had fixed the e issue, you would see that when you click on an h3 you get all 100 alerts.

Try changing

It is because you're setting this.a and this.alpha on the Bullet constructor class. So at the time you set these variables the value of c.ang.value is 0.

So to make your code work you must set your Bullet properties in the log function, like this:

You are not calling the function intro in the last line. Instead, you are printing the function object. Change the last line to:

You can use a CSS class name added in your "Accitional CSS" box and added to the specific "List" block in the editor.

CSS (note the . at the beginning):

Doxygen 1.8.13 is already a bit older (December 2016), I certainly advise to update to the current version 1.9.1 but this is not the cause of the problem/.

The provided Doxyfile is not really minimal and contains a lot of project specific stuff not relevant for the issue at hand. A doxyfile with

If you want `"Heading1" to be a top-level key, you need to dedent it

You cannot use pygame.sprite.groupcollide() here, because the bullets collide with the player that shoots the bullets.
You have to use pygame.sprite.spritecollide(), with one player and the bullets of the opponent. Call it once for each player.