Std.Tree.pathTo
1 declaration
fn
pathTo: &Std.Tree.Tree[T] -> fn(T) -> Bool -> Option[Array[Int]]This is a callable function.
What it does
The path to the first node the test accepts, in preorder, or None.
The root answers an empty path, which is a found node rather than a missing
one — the difference Option is carrying here.
Read the signature
- The text after the name is the type checked by Pudu.
- Read arrows from left to right: inputs come first, and the final type is returned.
- & borrows a value for this call instead of moving or copying it.
- Names inside [ ] are type arguments, such as the item type held by a collection.
- Option holds Some(value) or None when no value is available.