Hi everyone! If some 3rd party lib is providing t...

# getting-started

[Luis]

Hi everyone!

If some 3rd party lib is providing the following couple of functions:

fun find(session: Session, query: Query) {}
fun find(query: Query) {}

Is there a cleaner way than this to pick which one to use?

fun caller(session: Session?) {
    val query = Query()
    if (session == null) {
        return find(query)
    }
    return find(session, query)
}

Thanks!

[Alexander Maryanovsky]

You can write your own find with a default null value for the session parameter, and call it from everywhere.

[Alexander Maryanovsky]

fun myFind(query: Query, session: Session? = null) = if (session == null) find(query) else find(session, query)

[Luis]

Thanks a lot! That's definitely one way to go.

Any "syntactic sugar" alternatives that wouldn't require my own find function?

[Alexander Maryanovsky]

You have to explicitly call one of the find functions, so whatever you write, it will at least have the two expressions find(session, query) and find(query). Given that, how much shorter than

if (session == null) find(query) else find(session, query)

can you go?

[Luis]

Thanks again! That clears it for me

[Ties]

return session?.let { find(it, query) } ?: find(query)

[Alexander Maryanovsky]

@Ties That’s a bad idea. If find(it, query) returns null, you will end up calling find(query) too.

[Ties]

Ah yes, didn't think of that (and adding another Elvis operator would not make it prettier)