So I have a class called app. It is just a class that controls all the other classes inside of it. Mid development we discussed to make this app class a singleton. This makes clear to other developers that there should only be one App. This sounds logical and is the correct way to use a singleton. The only questions arises that if you use this singleton to access its properties and make them accessible for others. Are you then using a singleton "incorrectly"? I know you should not use singleton "because it's convenient". But is this the case here?
Using a singleton in my app. Am i implementing it correctly?
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Short answer: No
Long answer: It depends