I disagree. What if, hear me out, parents actually parent, instead of relegating the parenting to companies, and ruining the internet for the rest of us?
One common use case for the @ operator, is when "destructuring" array members into variables. In some cases, you can't know if the member will be available, but it's not important if it's missing. In that case, you can silence the warning.
It was implemented in some of the earlier Leopard beta's iirc. Possible speculation from my side, but it was probably removed due to licensing once Oracle expressed interest in acquiring Sun Microsystems.
As a side note, I personally HATE apps that opens links in an in-app web view (apps like Instagram, Facebook, etc). I really wish Apple could have a system wide preference where it could force in-app web views to open in the browser.
It goes both ways. If you try to post anything remotely criticizing Donald Trump or his government on /r/conservative you'll also get banned. Even if you try to keep it objective.
Open System Settings, click "Sound" in the sidebar. Under the "Sound Effects" section, you'll find a toggle labeled "Play sound on startup". Turn this off to permanently disable it. Otherwise, the startup sound is tied to the audio level you had before last shutdown.