Why are trees naturally recursive data structures?
Because each node in a tree is itself a tree (a subtree). The children of a node are trees. This self-similar structure makes recursion the natural approach for traversal, search, and manipulation.
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More FAQs in Recursion for Tree Traversal in JavaScript
function traverse(node) { callback(node); if (node.children) node.children.forEach(child => traverse(child)); }. Process the current node, then recurse into each child. The base case is implicit (no children = no recursion).
function walkDOM(node, callback) { callback(node); Array.from(node.children).forEach(child => walkDOM(child, callback)); }. Call the callback on the current node, then recurse into each child element.
function inorder(node) { if (!node) return; inorder(node.left); console.log(node.value); inorder(node.right); }. Visit left subtree, then root, then right subtree. Returns values in sorted order for a BST.
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