Mr Matrix questions

• When is `string.swapcase().swapcase()` not equal to `string`?
• Why does python lru_cache performs best when maxsize is a power-of-two?
• CompletableFuture exception handling runAsync & thenRun
• Infinite loop while adding two integers using bitwise operations?
• CompletableFuture runAsync vs supplyAsync, when to choose one over the other?

Mr Matrix answers