Unity/C# Tip - #03: String To Hash 

Const: You can use const to declare a value at compile time that will never change during runtime. I usually use const to declare strings and remove magic numbers. In this video of the Ghosts 'n Goblins series, I use const to declare some fields inside the LadderController: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-y81ySawtecE.html And also in this video of the event bus 2024 solution, I use const to declare the event names. Since the names won't change at runtime, I can create them at compilation time: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-FhuKp-d9MUQ.html Readonly: You can use this to initialize the variable in the object constructor or field declaration. Since the value will not change, the only thing that you will be able to do with that field is read the value. Because MonoBehaviour doesn't have constructors, you can't declare a readonly field and try to assign it during Awake or Start. So I mostly use to declare Data Structures, and also with EventBus where I need to pass some parameters I usually declare the record fields as readonly and assign them in the constructor. In this example, the animator variable is assigned in the declaration, so I can only read the generated hash value. On the Object Pooling video I use a const field to use as Default pool size and readonly for the _poolsDictionary: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-uOiXN3kuM2o.html I reformulated a little bit the object pool class, after using for sometime I found some problems and areas to improve, so I'll make another video like the event bus but for the object pool 2024 solution. There are some other cases, which the docs explains well: Readonly: learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/readonly Const: learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/const