Where should companion objects go in the file? Top...

# codingconventions

[kevmoturi]

Where should companion objects go in the file? Top or the bottom?

Also coming from java... how are we supposed to treat files? should i just keep all related classes in one file?

[bachhuberdesign]

kevmoturi: Treat files exactly the same way you would as Java (i.e. separate when it makes sense, together when it makes sense). I keep companion objects at the top but it’s personal preference, I know a lot of Kotlin developers like having them at the bottom. Just don’t keep them in the middle 😅

[bachhuberdesign]

If I was writing Java my statics/constants would always be at the top — so I like to have the same style in Kotlin (except they are part of the companion object)

[bachhuberdesign]

For extension functions, I like to have a separate file for each class that is being extended (same as Swift). So ActivityExtensions.kt, ContextExtensions.kt, ViewExtensions.kt, etc etc. Much easier to go through if someone else is looking at your code

[kevmoturi]

Same here I like them at the top... my IDE (Android Studio) throws them at the bottom when I convert my Java usually.

[bachhuberdesign]

Same here, wish there was an option in AS/Kotlin plugin to flip it

[zak.taccardi]

I would say bottom because you get visual separation of static vs instance members.

primary constructor is always at top and that’s instance based