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Time Complexity: O(h) where h = height of tree - Each iteration moves one level deeper - Maximum iterations = height of tree Returns: (node, comparison_count) or (None, comparison_count) """ comparisons = 0 current = root while current is not None: comparisons += 1 # Count each comparison if target == current.value: # Found! We made 'comparisons' comparisons return current, comparisons elif target < current.value: # Go left - one level deeper current = current.left else: # Go right - one level deeper current = current.right # Not found after traversing to leaf level return None, comparisons # Example: Balanced BST with 15 nodes (height = 3) # Searching for 13: # Step 1: Compare with 8 (13 > 8) → go right to 12 # Step 2: Compare with 12 (13 > 12) → go right to 14 # Step 3: Compare with 14 (13 < 14) → go left to 13 # Step 4: Compare with 13 (13 == 13) → FOUND! # Total: 4 comparisons = height + 173:T539,interface SearchResult { node: BSTNode | null; comparisons: number; } function search(root: BSTNode | null, target: T): SearchResult { /** * BST Search with step counting for complexity analysis. * * Time Complexity: O(h) where h = height of tree * - Each iteration moves one level deeper * - Maximum iterations = height of tree */ let comparisons = 0; let current = root; while (current !== null) { comparisons++; // Count each comparison if (target === current.value) { // Found! 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Structures & Algorithms","topic":"BST Time Complexity Analysis","title":"BST Time Complexity Analysis","description":"Master the time complexity analysis of Binary Search Tree operations. Understand best-case, worst-case, and average-case scenarios, and discover why tree balance is the critical factor that determines whether your BST operations run in O(log n) or degrade to O(n).","difficulty":"INTERMEDIATE","estimatedMinutes":60,"pages":[{"id":"seed_9f29c5cdbb71f114186dce6c0957c917","title":"Best Case — Balanced Tree, O(log n)","order":0,"content":[{"id":"opening-hook","title":"The Promise of Logarithmic Performance","content":[{"data":{"content":"When computer scientists praise Binary Search Trees for their efficiency, they're referring to a specific scenario: the **balanced tree**. In this ideal configuration, every BST operation—search, insertion, deletion—completes in **O(log n)** time. This logarithmic performance is what makes BSTs attractive for dynamic data management.\n\nBut what exactly does \"balanced\" mean? Why does balance lead to logarithmic complexity? And how dramatic is the performance difference compared to unbalanced trees?\n\nThis page answers these questions by dissecting the best-case scenario for BST operations. You'll develop a rigorous understanding of *why* balanced trees are efficient, not just *that* they are. This foundation is essential for understanding when BSTs deliver on their promise—and when they fail spectacularly."},"type":"text"},{"data":{"icon":"Target","title":"Learning Objectives","content":"By the end of this page, you will: (1) Define what makes a BST \"balanced\" in precise terms, (2) Prove why balanced BST operations run in O(log n) time, (3) Understand the relationship between tree height and operation cost, (4) Calculate exact operation counts for balanced trees of various sizes, and (5) Recognize the multiplicative power of logarithmic algorithms at scale.","variant":"info"},"type":"callout"}]},{"id":"what-balanced-means","title":"What Does \"Balanced\" Mean?","content":[{"data":{"content":"Before analyzing complexity, we must precisely define \"balance.\" The term is used loosely in casual discussion, but for rigorous analysis, we need mathematical precision.\n\n**Perfect Balance: The Theoretical Ideal**\n\nA **perfectly balanced binary tree** is one where:\n1. Every level is completely filled, except possibly the last level\n2. The last level has nodes as far left as possible\n3. For any node, the heights of its left and right subtrees differ by at most 1\n\nIn a perfectly balanced BST with *n* nodes, the height *h* satisfies:\n\n$$h = \\lfloor \\log_2 n \\rfloor$$\n\nThis means the tree's height is the floor of the base-2 logarithm of the number of nodes."},"type":"text"},{"data":{"icon":"Info","title":"Height Definition Reminder","content":"The **height** of a tree is the number of edges on the longest path from the root to any leaf. A single node has height 0. An empty tree has height -1 (by convention). The height determines the maximum number of comparisons needed for any operation.","variant":"note"},"type":"callout"},{"data":{"content":"**Visualizing Perfect Balance**\n\nConsider a balanced BST with 15 nodes and values 1-15. In the optimal arrangement:\n\n```\n 8\n / \n 4 12\n / \\ / \n 2 6 10 14\n /\\ /\\ /\\ /\n 1 3 5 7 9 11 13 15\n```\n\n**Key observations:**\n- **Height = 3** (edges from root 8 to any leaf like 1)\n- **Levels completely filled:** Level 0 has 1 node, Level 1 has 2, Level 2 has 4, Level 3 has 8\n- **Node count pattern:** 1 + 2 + 4 + 8 = 15 = 2⁴ - 1 = 2^(h+1) - 1\n\nThis geometric relationship between height and node count is the key to logarithmic performance."},"type":"text"},{"data":{"rows":[["1","0","0","1"],["3","1","1.58","2"],["7","2","2.81","3"],["15","3","3.91","4"],["31","4","4.95","5"],["63","5","5.98","6"],["127","6","6.99","7"],["1,023","9","9.99","10"],["1,048,575","19","~20","20"]],"caption":"Node Count and Height in Perfectly Balanced BSTs","headers":["Nodes (n)","Height (h)","log₂(n)","Levels Filled"]},"type":"table"},{"data":{"content":"**The Critical Insight:**\n\nNotice that **height grows logarithmically** with node count. Doubling the nodes adds only one level. This is the source of BST efficiency: even with a million nodes, we need at most ~20 comparisons to find any value. This stands in stark contrast to linear structures where finding a value might require checking all million entries."},"type":"text"}],"titleType":"number","titleNumber":1},{"id":"operations-cost-height","title":"Why BST Operations Cost O(h)","content":[{"data":{"content":"Before claiming O(log n) for balanced trees, we must establish a more fundamental fact: **all BST operations cost O(h)**, where *h* is the tree's height. This relationship is the foundation of all BST complexity analysis.\n\n**Search: The Canonical Operation**\n\nWhen searching for a value in a BST:\n1. Start at the root\n2. Compare the target with the current node\n3. If equal, found it—done\n4. If target < current, go left\n5. If target > current, go right\n6. Repeat until found or reach a null pointer\n\nThe key observation: **each comparison moves us one level deeper**. In the worst case of a successful search, we travel from root to the node containing the target. In an unsuccessful search, we travel from root to a leaf (or null child).\n\nThe maximum number of comparisons equals the maximum path length from root to any destination—which is exactly the tree's height *h*."},"type":"text"},{"data":{"fileName":"bst_search_analysis.py","languages":[{"code":"$72","label":"Python","value":"python"},{"code":"$73","label":"TypeScript","value":"typescript"}],"showLineNumbers":true},"type":"code"},{"data":{"content":"**Insertion: Search + Constant Work**\n\nInsertion follows the same path as search:\n1. Search for where the new value *should* be\n2. When reaching a null pointer, insert there\n\nSince we traverse the same path as search (at most *h* levels), and insertion at a leaf is O(1), the total cost is O(h).\n\n**Deletion: Search + At Most O(h) Reorganization**\n\nDeletion is more complex, with three cases:\n1. **Deleting a leaf:** Search to find it (O(h)), remove it (O(1))\n2. **Deleting node with one child:** Search (O(h)), bypass node (O(1))\n3. **Deleting node with two children:** Search (O(h)), find successor (O(h)), swap and delete (O(1))\n\nIn all cases, total work is O(h)."},"type":"text"},{"data":{"icon":"Lightbulb","title":"The Fundamental Theorem of BST Complexity","content":"All basic BST operations (search, insert, delete, find min/max, find successor/predecessor) have time complexity O(h), where h is the tree's height. The performance of any BST is entirely determined by how well we control the height. This is why balance matters: a balanced tree has h = O(log n), while an unbalanced tree can have h = O(n).","variant":"tip"},"type":"callout"}],"titleType":"number","titleNumber":2},{"id":"logarithmic-connection","title":"The Logarithmic Connection: From O(h) to O(log n)","content":[{"data":{"content":"We've established that BST operations cost O(h). Now let's prove that for a balanced BST, h = O(log n).\n\n**The Mathematical Proof**\n\nConsider a perfectly balanced binary tree with height *h*. How many nodes can it contain?\n\n- Level 0 (root): 2⁰ = 1 node\n- Level 1: 2¹ = 2 nodes\n- Level 2: 2² = 4 nodes\n- ...\n- Level h: 2^h nodes\n\n**Total nodes in a complete tree of height h:**\n$$n = 2^0 + 2^1 + 2^2 + ... + 2^h = 2^{h+1} - 1$$\n\nThis is the geometric series formula. Solving for *h*:\n$$n = 2^{h+1} - 1$$\n$$n + 1 = 2^{h+1}$$\n$$\\log_2(n + 1) = h + 1$$\n$$h = \\log_2(n + 1) - 1$$\n\nFor large *n*, this approximates to:\n$$h \\approx \\log_2 n$$\n\nTherefore, in a balanced BST:\n$$O(h) = O(\\log n)$$"},"type":"text"},{"data":{"rows":[["10","3","4","2.5× faster"],["100","6","7","14× faster"],["1,000","9","10","100× faster"],["10,000","13","14","714× faster"],["100,000","16","17","5,882× faster"],["1,000,000","19","20","50,000× faster"],["1,000,000,000","29","30","33,333,333× faster"]],"caption":"Exact Height Calculations for Balanced BSTs","headers":["Nodes (n)","Height h = floor(log₂(n))","Max Comparisons (h+1)","Versus Linear O(n)"]},"type":"table"},{"data":{"icon":"AlertCircle","title":"The Staggering Power of Logarithms","content":"With 1 billion nodes, a balanced BST needs at most 30 comparisons to find any value. A linear search would need up to 1,000,000,000 comparisons. That's a **33 million times** improvement. This is why logarithmic algorithms are considered \"efficient\" and linear algorithms can become problematic at scale.","variant":"warning"},"type":"callout"},{"data":{"content":"**Why Logarithms Grow So Slowly**\n\nThe logarithm function is the inverse of exponentiation. While exponential functions explode (2, 4, 8, 16, 32...), logarithms creep upward (1, 2, 3, 4, 5...).\n\nIntuition: Every time you double *n*, the logarithm increases by just 1.\n\n- log₂(100) ≈ 7\n- log₂(1,000) ≈ 10\n- log₂(1,000,000) ≈ 20\n- log₂(1,000,000,000) ≈ 30\n\nThis \"compression\" of the input size is exactly what makes balanced BSTs efficient. No matter how large the data grows, the number of operations grows almost imperceptibly.\n\n**Real-World Implications**\n\nConsider a database index implemented as a balanced BST:\n- 10,000 records: ~14 operations per query\n- 10,000,000 records: ~24 operations per query\n- 10,000,000,000 records: ~34 operations per query\n\nGoing from 10 thousand to 10 billion records—a million-fold increase—only triples the operation count. This scalability is the essence of efficient algorithm design."},"type":"text"}],"titleType":"number","titleNumber":3},{"id":"tracing-best-case","title":"Tracing Best-Case Operations Step-by-Step","content":[{"data":{"content":"Theory is essential, but let's make it concrete by tracing operations on a balanced BST. Consider a perfectly balanced BST containing the values 1 through 15:\n\n```\n 8\n / \n 4 12\n / \\ / \n 2 6 10 14\n /\\ /\\ /\\ /\n 1 3 5 7 9 11 13 15\n```\n\n**Properties:**\n- n = 15 nodes\n- h = 3 (height)\n- Maximum comparisons for any operation: 4 (h + 1)"},"type":"text"},{"data":{"tabs":[{"id":"search-example","label":"Search Examples","content":[{"data":{"content":"**Finding value 5:**"},"type":"text"},{"data":{"rows":[["1","8","5 < 8","Go left"],["2","4","5 > 4","Go right"],["3","6","5 < 6","Go left"],["4","5","5 = 5","Found!"]],"headers":["Step","Current Node","Comparison","Decision"]},"type":"table"},{"data":{"content":"**Total: 4 comparisons** (node is at depth 3)\n\n---\n\n**Finding value 8 (root):**"},"type":"text"},{"data":{"rows":[["1","8","8 = 8","Found!"]],"headers":["Step","Current Node","Comparison","Decision"]},"type":"table"},{"data":{"content":"**Total: 1 comparison** (node is at depth 0 — the root)\n\n---\n\n**Finding value 16 (not in tree):**"},"type":"text"},{"data":{"rows":[["1","8","16 > 8","Go right"],["2","12","16 > 12","Go right"],["3","14","16 > 14","Go right"],["4","15","16 > 15","Go right → NULL"]],"headers":["Step","Current Node","Comparison","Decision"]},"type":"table"},{"data":{"content":"**Total: 4 comparisons** (reached leaf level, target not found)"},"type":"text"}],"titleIcon":"Target"},{"id":"insert-example","label":"Insert Examples","content":[{"data":{"content":"**Inserting value 0:**"},"type":"text"},{"data":{"rows":[["1","8","0 < 8","Go left"],["2","4","0 < 4","Go left"],["3","2","0 < 2","Go left"],["4","1","0 < 1","Go left → NULL"]],"headers":["Step","Current Node","Comparison","Decision"]},"type":"table"},{"data":{"content":"**Insert 0 as left child of 1**\n\n**Total: 4 comparisons + 1 insert = O(h+1) = O(h)**\n\n---\n\n**Inserting value 8.5:**"},"type":"text"},{"data":{"rows":[["1","8","8.5 > 8","Go right"],["2","12","8.5 < 12","Go left"],["3","10","8.5 < 10","Go left"],["4","9","8.5 < 9","Go left → NULL"]],"headers":["Step","Current Node","Comparison","Decision"]},"type":"table"},{"data":{"content":"**Insert 8.5 as left child of 9**\n\n**Total: 4 comparisons + 1 insert = O(h)**\n\nNote: After insertion, the tree may become slightly unbalanced. We'll address this in later modules on self-balancing trees."},"type":"text"}],"titleIcon":"Zap"},{"id":"delete-example","label":"Delete Examples","content":[{"data":{"content":"**Deleting value 3 (leaf node):**\n\n*Step 1: Find the node*"},"type":"text"},{"data":{"rows":[["1","8","3 < 8","Go left"],["2","4","3 < 4","Go left"],["3","2","3 > 2","Go right"],["4","3","3 = 3","Found!"]],"headers":["Step","Current Node","Comparison","Decision"]},"type":"table"},{"data":{"content":"*Step 2: Delete leaf node (trivial)*\n\nSimply remove node 3. Total: 4 comparisons + O(1) deletion.\n\n---\n\n**Deleting value 4 (node with two children):**\n\n*Step 1: Find the node (2 comparisons to reach 4)*\n\n*Step 2: Find inorder successor*\nThe inorder successor of 4 is the minimum in its right subtree.\n- Go right to 6\n- Go left to 5 (minimum)\n\n*Step 3: Replace 4's value with 5, delete original 5*\n\nTotal: 2 (find node) + 2 (find successor) + O(1) = O(h)\n\nEven the most complex deletion case stays within O(h) because finding the successor requires at most traversing from the deleted node down to a leaf."},"type":"text"}],"titleIcon":"AlertCircle"}],"defaultTab":"search-example"},"type":"tabs"}],"titleType":"number","titleNumber":4},{"id":"comparing-alternatives","title":"Comparing to Alternative Data Structures","content":[{"data":{"content":"To appreciate the O(log n) performance of balanced BSTs, let's compare them to other data structures for the fundamental operations: search, insert, and delete."},"type":"text"},{"data":{"rows":[["Unsorted Array","O(n)","O(1)*","O(n)","No"],["Sorted Array","O(log n)","O(n)","O(n)","Yes"],["Unsorted Linked List","O(n)","O(1)","O(n)","No"],["Sorted Linked List","O(n)","O(n)","O(n)","Yes"],["Hash Table","O(1) avg","O(1) avg","O(1) avg","No"],["Balanced BST","O(log n)","O(log n)","O(log n)","Yes"]],"caption":"Time Complexity Comparison: Key Operations","headers":["Data Structure","Search","Insert","Delete","Maintains Order?"]},"type":"table"},{"data":{"icon":"Info","title":"The BST Sweet Spot","content":"*Insert for unsorted array is O(1) if appending, but O(n) if inserting at a specific position.","variant":"note"},"type":"callout"},{"data":{"left":[{"data":{"items":["**Dynamic data** — Frequent insertions and deletions","**Ordered operations** — Range queries, sorted traversal, find min/max","**Predictable performance** — Need guaranteed O(log n) worst case","**In-order access** — Walking through elements in sorted order","**Successor/predecessor** — Finding the next largest or smallest"],"title":{"icon":"CheckCircle","text":"When Balanced BSTs Excel","type":"icon","color":"primary","variant":"outline-circle"},"variant":"accent"},"type":"list"}],"right":[{"data":{"items":["**Hash tables** — When you only need key lookup (no ordering)","**Sorted arrays** — When data is static (no updates after initialization)","**Heaps** — When you only need min/max access, not arbitrary search","**B-trees** — When data lives on disk (better cache/disk performance)","**Unsorted arrays** — When insert order matters and no searching needed"],"title":{"icon":"XCircle","text":"When Other Structures Win","type":"icon","color":"destructive","variant":"outline-circle"},"variant":"accent"},"type":"list"}]},"type":"two-column"},{"data":{"content":"**The Unique Value Proposition**\n\nBalanced BSTs occupy a unique position in the data structure landscape: they're the only structure that provides:\n\n1. **O(log n)** for ALL of search, insert, and delete\n2. **Maintained sorting order** at all times\n3. **Dynamic resizing** without expensive rebuilds\n\nHash tables are faster for pure key lookup (O(1) average), but they can't answer \"what's the smallest key greater than X?\" efficiently. Sorted arrays can do binary search, but insertions cost O(n). Balanced BSTs give you the best of both worlds—at the cost of more complex implementation."},"type":"text"}],"titleType":"number","titleNumber":5},{"id":"balance-requirement","title":"The Balance Requirement: A Preview of What Can Go Wrong","content":[{"data":{"content":"Throughout this page, we've emphasized \"balanced\" BST. But what happens when a BST isn't balanced? The answer is sobering: performance can degrade from O(log n) all the way to O(n)—essentially becoming a linked list.\n\n**Consider inserting 1, 2, 3, 4, 5 into an empty BST:**"},"type":"text"},{"data":{"fileName":"degenerate_bst.txt","languages":[{"code":"After inserting 1: After inserting 2: After inserting 3, 4, 5:\n \n 1 1 1\n \\ \\\n 2 2\n \\\n 3\n \\\n 4\n \\\n 5\n\nHeight: 0 Height: 1 Height: 4\n\nThis is a \"degenerate\" or \"skewed\" BST. It's technically valid\n(left < root < right holds at every node), but its height equals\nn-1 instead of log(n). Operations now cost O(n)!","label":"Visualization","value":"text"}],"showLineNumbers":false},"type":"code"},{"data":{"icon":"AlertCircle","title":"The Danger of Degenerate BSTs","content":"Inserting already-sorted data into a naive BST produces the worst possible structure. With n = 1,000,000 nodes in sorted order, accessing the last element requires 999,999 comparisons instead of ~20. This is a 50,000x performance hit!","variant":"error"},"type":"callout"},{"data":{"content":"**Why This Matters Practically**\n\nIn real-world scenarios, data is often partially or fully sorted:\n- Database primary keys (auto-incrementing IDs)\n- Timestamps of events\n- Alphabetically ordered names\n- Sequential file processing\n\nWithout balance guarantees, a BST can silently degrade from a high-performance data structure into an expensive linked list. This is why self-balancing tree variants (AVL trees, Red-Black trees) exist—they automatically maintain balance during insertions and deletions.\n\nWe'll explore the worst case and its implications in depth in the next page. For now, the key takeaway is:\n\n> **The O(log n) guarantee of BSTs requires balance. Without balance, the guarantee evaporates.**"},"type":"text"}],"titleType":"number","titleNumber":6},{"id":"summary","title":"Summary: The Best-Case Promise","content":[{"data":{"content":"We've established the theoretical foundation for understanding BST performance at its best. Let's consolidate the key insights:"},"type":"text"},{"data":{"type":"ordered","items":["**Balance is precisely defined** — A balanced BST has height h ≈ log₂(n), achieved when nodes are distributed to minimize the longest root-to-leaf path.","**All BST operations cost O(h)** — Search, insert, and delete all traverse at most one root-to-leaf path, making height the determining factor in performance.","**Balanced means O(log n)** — When h = O(log n), all operations achieve logarithmic time complexity.","**Logarithms grow incredibly slowly** — A billion nodes require only ~30 comparisons. This scalability is the essence of efficient algorithm design.","**BSTs uniquely combine dynamic updates with ordered access** — Unlike hash tables (no order) or sorted arrays (expensive updates), BSTs provide the best of both.","**Balance is not automatic** — Standard BST insertion can produce degenerate trees. Maintaining O(log n) requires either careful insertion order or self-balancing mechanisms."],"title":{"icon":"CheckCircle","text":"Key Takeaways","type":"icon","color":"primary","variant":"outline-circle"},"variant":"accent"},"type":"list"},{"data":{"content":"**What's Next:**\n\nThis page covered the best case—when everything goes right. But any rigorous complexity analysis must also examine the worst case. In the next page, we'll explore what happens when a BST becomes degenerate, understanding exactly how and why O(log n) can collapse to O(n). This understanding is crucial for knowing when BSTs can be trusted and when alternative structures are needed."},"type":"text"},{"data":{"icon":"CheckCircle","title":"Page Complete","content":"You now understand the best-case performance of Binary Search Trees: when balanced, they achieve O(log n) for all fundamental operations by maintaining a height proportional to the logarithm of the node count. Next, we'll examine the dark side: what happens when balance is lost and performance degrades to O(n).","variant":"success"},"type":"callout"}],"titleType":"number","titleNumber":7}],"isLocked":false},{"id":"seed_a3eebb1cb26c3f6378d215d49dc7ce77","title":"Worst Case — Degenerate Tree, O(n)","order":1,"content":null,"isLocked":true},{"id":"seed_e57dd103b628c319476da856ce434876","title":"Average Case Considerations","order":2,"content":null,"isLocked":true},{"id":"seed_dac14b59040b920d7f393806adc880a1","title":"Why Balance Matters So Much","order":3,"content":null,"isLocked":true}]}},"dataUpdateCount":1,"dataUpdatedAt":1792292153616,"error":null,"errorUpdateCount":0,"errorUpdatedAt":0,"fetchFailureCount":0,"fetchFailureReason":null,"fetchMeta":null,"isInvalidated":false,"status":"success","fetchStatus":"idle"},"queryKey":[["learningContent","getModule"],{"input":{"slug":"bst-time-complexity-analysis"},"type":"query"}],"queryHash":"[[\"learningContent\",\"getModule\"],{\"input\":{\"slug\":\"bst-time-complexity-analysis\"},\"type\":\"query\"}]"},{"dehydratedAt":1792292153657,"state":{"data":{"json":null},"dataUpdateCount":1,"dataUpdatedAt":1792292153617,"error":null,"errorUpdateCount":0,"errorUpdatedAt":0,"fetchFailureCount":0,"fetchFailureReason":null,"fetchMeta":null,"isInvalidated":false,"status":"success","fetchStatus":"idle"},"queryKey":[["learningContent","getProgress"],{"input":{"moduleId":"seed_873e78f52b81b0381b531cccbc15de71"},"type":"query"}],"queryHash":"[[\"learningContent\",\"getProgress\"],{\"input\":{\"moduleId\":\"seed_873e78f52b81b0381b531cccbc15de71\"},\"type\":\"query\"}]"},{"dehydratedAt":1792292153657,"state":{"data":{"json":null},"dataUpdateCount":1,"dataUpdatedAt":1792292153617,"error":null,"errorUpdateCount":0,"errorUpdatedAt":0,"fetchFailureCount":0,"fetchFailureReason":null,"fetchMeta":null,"isInvalidated":false,"status":"success","fetchStatus":"idle"},"queryKey":[["feedback","get"],{"input":{"contentType":"LEARNING_PAGE","contentId":"seed_e57dd103b628c319476da856ce434876"},"type":"query"}],"queryHash":"[[\"feedback\",\"get\"],{\"input\":{\"contentId\":\"seed_e57dd103b628c319476da856ce434876\",\"contentType\":\"LEARNING_PAGE\"},\"type\":\"query\"}]"},{"dehydratedAt":1792292153657,"state":{"data":{"json":null},"dataUpdateCount":1,"dataUpdatedAt":1792292153617,"error":null,"errorUpdateCount":0,"errorUpdatedAt":0,"fetchFailureCount":0,"fetchFailureReason":null,"fetchMeta":null,"isInvalidated":false,"status":"success","fetchStatus":"idle"},"queryKey":[["feedback","getUserLike"],{"input":{"contentType":"LEARNING_PAGE","contentId":"seed_e57dd103b628c319476da856ce434876"},"type":"query"}],"queryHash":"[[\"feedback\",\"getUserLike\"],{\"input\":{\"contentId\":\"seed_e57dd103b628c319476da856ce434876\",\"contentType\":\"LEARNING_PAGE\"},\"type\":\"query\"}]"},{"dehydratedAt":1792292153657,"state":{"data":{"json":[]},"dataUpdateCount":1,"dataUpdatedAt":1792292153617,"error":null,"errorUpdateCount":0,"errorUpdatedAt":0,"fetchFailureCount":0,"fetchFailureReason":null,"fetchMeta":null,"isInvalidated":false,"status":"success","fetchStatus":"idle"},"queryKey":[["highlights","getHighlights"],{"input":{"contentType":"LEARNING_PAGE","contentId":"seed_e57dd103b628c319476da856ce434876"},"type":"query"}],"queryHash":"[[\"highlights\",\"getHighlights\"],{\"input\":{\"contentId\":\"seed_e57dd103b628c319476da856ce434876\",\"contentType\":\"LEARNING_PAGE\"},\"type\":\"query\"}]"},{"dehydratedAt":1792292153657,"state":{"data":"$undefined","dataUpdateCount":0,"dataUpdatedAt":0,"error":null,"errorUpdateCount":0,"errorUpdatedAt":0,"fetchFailureCount":0,"fetchFailureReason":null,"fetchMeta":null,"isInvalidated":false,"status":"pending","fetchStatus":"fetching"},"queryKey":[["highlights","getPopularHighlights"],{"input":{"contentType":"LEARNING_PAGE","contentId":"seed_e57dd103b628c319476da856ce434876","minCount":2},"type":"query"}],"queryHash":"[[\"highlights\",\"getPopularHighlights\"],{\"input\":{\"contentId\":\"seed_e57dd103b628c319476da856ce434876\",\"contentType\":\"LEARNING_PAGE\",\"minCount\":2},\"type\":\"query\"}]","promise":"$@74"}]},"children":"$L75"}]