val currentUser = mAuth!!.currentUser what means ...

# android

[Manjee]

val currentUser = mAuth!!.currentUser

what means ‘!!’ ??

[yaakov]

Non-null assertion.

[Manjee]

oh i see thank you

[marcinmoskala]

unsafe. It throws error when mAuth == null

[orangy]

#getting-started

[rootandy]

better use mAuth?.currentUser or

mAuth?.currentUser?.let { currentUser -> 
     // someLogic
}

[amatsehor]

And even better with a fallback (sure, if you really need it)
mAuth?.currentUser?.let { currentUser ->
// someLogic
} ?: kotlin.run {
// smth if mAuth or currentUser is null
}

[marcinmoskala]

@amatsehor You really think it is more readable then this?

val user = mAuth?.currentUser
if(user != null) { 
    // someLogic
} else {
    // smth if _mAuth_ or _currentUser_ is _null_
}

[amatsehor]

Sure, your solution is better