Writing · Nº 041065 essays
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Ideas from inside the work. Explore technology, entrepreneurship, and the practice of building things that last.
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Clear filtersEngineeringTyping Indicators and Presence, Done RightTyping indicators and presence are ephemeral signals. Keep them out of your database, drive them with short-lived state, and expire them on the server.EngineeringHow to Build a Presence System That Feels LiveA presence system tracks who is online in real time. Here is what building presence actually requires, why it is harder than it looks, and how to keep it accurate.