``` override fun onBackPressed() { dra...

# announcements

[Marcin Wisniowski]

override fun onBackPressed() {
        drawer?.run {
            if (!isDrawerOpen) {
                openDrawer()
                this
            } else null
        } ?: super.onBackPressed()
    }

[Nikky]

maybe drawer?.takeIf { !isDrawerOpen }?.apply { openDrawer() }
to avoid if else null and you can also ret rid of the run block then

[Marcin Wisniowski]

Looks good, but isDrawerOpen is a method of the drawer, so it won't work inside the takeIf (and I can't do drawer.isDrawerOpen inside since it can be null).

[chalup]

Doesn't takeif provide the object as a lambda parameter?

[chalup]

i.e. I think you should be able to write takeif { !it.isdraweropen }

[chalup]

And I'd use takeunless instead of takeif with negation

[karelpeeters]

isDrawerOpen doesn't seem to be a member function of drawer

[Marcin Wisniowski]

drawer?.takeUnless { it.isDrawerOpen }?.apply { openDrawer() } ?: super.onBackPressed() works great! Thank you Jerzy, pozdrawiam. 🙂
Karel: drawer is the receiver in run which is why isDrawerOpen doesn't look like it uses it.