Replacing struct with enum

[christophaigner]

Description

Replacing the struct here with an enum gives one benefit: You cannot create instances of an enum, if it doesn't have a case inside. So you cannot write let myConstants = Constants() if you use an enum, but you can do so if you use a struct and this is something that you should avoid. Another option would be to make the init of this struct private, which is less convenient.

[emreozdil]

You are god damn right for constant usage 👍 . In this tip, we were given an example of static property usage. Also, we share this tip on Twitter, Instagram, and Telegram, therefore; we cannot edit these posts. To sum up, you can add a new tip about the "best practice of constant usage". 💯

[alicanbatur]

We should update the old commit using this pr. The problem is we shared images already. What should we do for them? Remove? :/

[christophaigner]

@emreozdil @alicanbatur you decide. In my opinion it'd be better to remove the old images, since the way it is written currently is just not ideal. In general it's not a big deal to use type properties on structs, it's more about the specific example, because you don't want anyone to create instances of this Constant value type.