I'm quite happy with my solution now, except for t...

# advent-of-code

[karelpeeters]

I'm quite happy with my solution now, except for the implementation of leaf 🙂.

[holgerbrandl]

So compact, great! Although in my taste the named nodes map feels a bit redundant because the nodes store the name anyway. A fun findByName(name:String) = nodes.first{it.name=name} might work equally well but would allow to use a simple list.