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How would you implement an instance variable in Swift that has to be thread-safely lazily initialized, but you also have code that depends on being called before it has been initialized, and needs to assert for that (thread-safely), what would you do? NSLock?

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This Mastodon instance is for people interested in technology. Discussions aren't limited to technology, because tech folks shouldn't be limited to technology either! We adhere to an adapted version of the TootCat Code of Conduct and follow the Toot Café list of blocked instances. Ash is the admin and is supported by Fuzzface, Brian!, and Daniel Glus as moderators. Hosting costs are largely covered by our generous supporters on Patreon – thanks for all the help!