While I try to understand the "Availability" (A) and "Partition tolerance" (P) in CAP, I found it difficult to understand the explanations from various articles. I get a feeling that A and P can ...

I have added an iOS 15+/macCatalyst 15.0+ function to my app and now it is crashing when run on an M1 iMac through Mac Catalyst (Designed for iPad). I have an availability check around my function ...

if a Enum type add new case in new os version，how to check availability in switch statement？ Like a Enum in StoreKit below public enum Code : Int { public typealias _ErrorType = SKError case unk...

Objective-C has an @available expression in XCode 9+ / LLVM 5+ that allows you to guard a block of code to at least a certain OS version so that it won't emit unguarded availability warnings if you...

I would like to run a piece of code only if the iOS version of the current device is below a specific version, as specified here. The code examples given by Apple look like this: if (@available(iO...

iOS 11 recently added a new feature I would like to use but I still need to support older versions of iOS. Is there a way to write the same class twice and have newer versions of iOS use one versio...

Previously, DynamoDB was providing "eventual consistency" only, obeying "Availability" and "Partition Tolerance" portion of CAP theorem. But now, DynamoDB provides "strong consistency" option apar...

I have a distributed application running on virtual machines, among which I have one service running on active/passive mode. The active VM provides service via a public IP. Should the active VM fai...