can anyone explain this snippet to me? im confused...

# announcements

[Mahdi Javaheri]

can anyone explain this snippet to me?
im confused what exactly happens

-.kt

[kr3v]

Extension function on AquariumPlant named pull, which prints removing $this, if instance of AquariumPlant, on which pull was invoked, was not null

[Mahdi Javaheri]

you sure it's the case of not null check?

[Mahdi Javaheri]

when i run this code :

val nullablePlant: AquariumPlant? = null
nullablePlant.pull()

the apply() method isn't invoked

[karelpeeters]

Right, x?.f() means if (x != null) x.f()

[karelpeeters]

https://kotlinlang.org/docs/reference/null-safety.html#safe-calls

[Mahdi Javaheri]

@kr3v you're right, i interpreted it wrong 😅

[Mahdi Javaheri]

@karelpeeters thank you for the reference