tree-structure-immutable/com.github.adriankuta.datastructure.tree.immutable/preOrder

preOrder

fun <T> ImmutableTreeNode<T>.preOrder(): List<ImmutableTreeNode<T>>(source)

Returns this subtree's nodes in pre-order (the receiver first, then each child subtree in order). Implemented iteratively, so it is safe on arbitrarily deep trees.

Return

the nodes of this subtree in pre-order, starting with the receiver.