#CallErs

ConcurrentDictionary.GetOrAdd can run your value factory more than once when threads race on the same key. Only one result is kept, but the extra factories still execute. Here's the race and the one-line Lazy fix.

BBS Developer rh1tech has published Boar BBS on GitHub, a bulletin board system that callers reach over telnet or SSH. It has ANSI color, CP437 block art, hotkey menus, private mail, public message boards, live chat, door games and a oneliner wall, along…

As we move toward a world of autonomous AI Agents, the "Access Control" problem undergoes a...