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Exercise 2

Implement a solution for finding a node in a binary search tree.

Solution

function findNodeInBST(root, target) {
  if (root === null) {
    return false;
  }
  if (root.val === target) {
    return true;
  }
  return findNodeInBST(target > root.val ? root.right : root.left, target);
}

The solution without using a ternary operator:

function findNodeInBST(root, target) {
  if (root === null) {
    return false;
  }
  if (root.val === target) {
    return true;
  }
  if (root.val < target) {
    return findNodeInBST(root.right, target);
  } else {
    return findNodeInBST(root.left, target);
  }
}

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