TreeScan

TreeScan[f, tree] evaluates f applied to the data of each subtree of tree in turn.

• TreeScan[f, tree, levelspec] applies f to the data of subtrees on levels of tree specified by levelspec.
• TreeScan[f, tree, levelspec -> elems] applies f to the elements elems of subtrees on levels specified by levelspec.
• TreeScan[f] represents an operator form of TreeScan that can be applied to a tree.

Examples

TreeScan[Print, Tree[1, {Tree[2], Tree[3]}]]

TreeScan[Print, tree, 2]

Please visit the official Wolfram Language Reference for more details.