Hi! In java, there is a shortcut for switching the...

# getting-started

[Oya Canli]

Hi! In java, there is a shortcut for switching the value of a boolean, like this:
myBoolean ^= true
So if it was true, it becomes false and if it was false it becomes true. Is there an equivalent in kotlin?

[karelpeeters]

Nothing shorter than myBoolean = !myBoolean

[diesieben07]

Shorter and also way more expressive of your actual intent.

[diesieben07]

xor-ing with true is clever, but you shouldn't have to look at something as simple as flipping a boolean and have to think about it for a minute.

[Oya Canli]

Oh actually there was a xor() method in kotlin, my bad..

Thanks for responses.. In my case, it is:
viewModel.isChildFragVisible = !viewModel.isChildFragVisible
and I type this in six places, so I thought there might be a better way.
But you're right, xor is not very expressive of the intent. May be I can just write a simple extension function called flip() or flipTruth()

[karelpeeters]

Not really, because functions can't get things by reference. Something like viewModel.toggleVisibility() could work of course.

[Oya Canli]

Yeah, sure, that can work as well. Thanks a lot for suggestions!

[marioled]

Just to mention that there is not() negation function as well:
myBoolean = myBoolean.not()
(which is ekvivalent to myBoolean = !myBoolean)