Rook

Move 1.2.0: ✓ Auto-updates ✓ Code block bugs fixed ✓ Slash menu expanded ✓ Editor polish The game continues.. userook.app

@kaaaash____ I have an idea

Be honest, if I give you this laptop, what will you use it for?

@Taniyatweets_ Notes?

i am a Vibe Coder, scare me with one word

@Sakshi50038 Rook! userook.app for taking coding notes !

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@dev_olayinka And if you need a place to take your notes, check us out! 🧡✏️

If you're a developer without taking notes, trust me you're just wasting your time. It will save you a lot of stress

@thesayannayak Hi 🧡

X is cool. But it's 100x better when you connect with people who code. If you're into tech, Al, or programming, drop "Hi" ❤️

@CodeWithAmann We are and we just launched !!! 🚀🧡 userook.app

What is the best note-taking system for developers?

@mrterrycarson Thank you!

@userookapp Congrats on the launch! Always cool to see new tools coming out for devs. Good luck with it!

if you're a developer you should know that userook.app is launching tomorrow!

@gudanglifehack DSA cheatsheets here! github.com/maryamtb/rook/…

✅ Coding Interview Cheatsheet 💻🚀 Ace your next tech interview with these must-know topics & tips: 🔹 1. DSA Basics - Arrays, Strings - Linked Lists - Stacks & Queues - Trees & Graphs - HashMaps & Sets 🔹 2. Key Algorithms - Searching: Binary Search - Sorting: Quick, Merge, Bubble - Recursion & Backtracking - Sliding Window & Two Pointers - Greedy Algorithms - Divide & Conquer - Dynamic Programming 🔹 3. System Design (for mid/senior) - Basics of Load Balancing, Caching, APIs - High-Level Design (scalable architecture) - Practice with real-world examples (URL shortener, Chat App) 🔹 4. Behavioral Questions - Tell me about yourself - Strengths/Weaknesses - A challenge you faced - STAR method (Situation, Task, Action, Result) 🔹 5. Interview Tips - Think out loud - Optimize after writing brute-force - Test edge cases - Write clean, readable code - Ask clarifying questions 🔹 6. Practice Platforms - LeetCode - HackerRank - Codeforces - InterviewBit - GeeksforGeeks 🔹 7. Common Asked Topics by Companies - FAANG: Trees, Graphs, DP - Startups: Arrays, Hashing, Greedy - Product Companies: System Design, OOP 💬 Tap ❤️ for more!

@Alacritic_Super Hey! Interested in contributing to our DSA pattern cheatsheets? github.com/maryamtb/rook/…

This Cheatsheet will help you to solve most of the DSA problems in the coding interviews: ◄ Array / String Inputs 1. Is the array sorted? → Use Binary Search, Two Pointers, or Prefix Sums 2. Optimization problems (Max/Min/Subarray)? → Think Sliding Window, Dynamic Programming, or Greedy 3. Looking for duplicates / counts / frequencies? → Use HashMap, HashSet, or Counting Array 4. Need substrings or fixed-size subarrays? → Apply Sliding Window with Two Pointers 5. Frequent min/max in window? → Use Monotonic Queue, Deque, or Heap 6. Generating subsets, permutations, combinations? → Use Backtracking 7. Matching / parsing characters? → Use Stack, especially for Balanced Parentheses, Infix/Postfix ◄ Graph Inputs 1. Shortest path in unweighted graph? → Use Breadth-First Search (BFS) 2. Weighted shortest path? → Use Dijkstra, Bellman-Ford, or A\ 3. Connected components / cycle detection? → Use DFS, Union-Find (DSU) 4. Topological ordering? → Use Kahn’s Algorithm or DFS + visited set 5. Optimization like MST? → Use Kruskal or Prim’s Algorithm ◄ Tree Inputs (Often Binary Trees) 1. Traversals? → Use Inorder, Preorder, Postorder, or Level-order (BFS) 2. Balanced checks or diameter calculations? → Use Postorder + height calculations 3. Lowest Common Ancestor? → Use Recursive DFS or Parent Map + Ancestor Set ◄ Linked List Inputs 1. Detecting cycles? → Use Slow and Fast Pointers (Floyd’s Algorithm) 2. Reversals / partial changes? → Use pointer juggling: prev, curr, next 3. Intersection or middle node? → Use Two Pointers ◄ Dynamic Programming Use-Cases 1. Optimal choices / Overlapping subproblems? → Use DP with Memoization (Top Down) or Tabulation (Bottom Up) 2. Subset or knapsack problems? → Use 1D/2D DP Arrays 3. String matching or edits? → Use DP Matrix (e.g., Edit Distance, LCS) ◄ Range Queries / Updates 1. Many sum queries, no updates? → Use Prefix Sums 2. Many sum queries + updates? → Use Segment Tree or Fenwick Tree (Binary Indexed Tree) ◄ Bit Manipulation 1. Set-based subsets or XOR logic? → Use Bit Masks or XOR 2. Need to check even/odd, set/unset bits? → Use `&`, `|`, `^`, `>>`, `<<` operators ◄ When Recursion is Banned or Stack Overflow Risk → Convert to Iterative using Stack ◄ Top K / Least K Elements → Use Heap → For exact K-th value, use Quick Select ◄ Special Techniques Sliding Window → For subarray with fixed or dynamic size Monotonic Stack → Next Greater / Smaller Element Greedy → Only when local optimum leads to global optimum Trie → For prefix-based string problems Follow and comment if this helped you! #PKV_Interview #DSA #Career

@Surendar__05 java

Be honest devs,Which programming language did you start your coding journey with?

imagine if your notes looked like this

@GithubProjects Rook: a notes app for developers (mac OS) github.com/maryamtb/rook

|￣￣￣￣￣￣￣￣￣￣￣￣￣| | Share your GitHub profile. | |＿＿＿＿＿＿＿＿＿＿＿＿＿| \ (•◡•) / \ / —— | | |_ |_

@isha_singh06 Take notes

What’s your main goal for today? 👇 💻 Build 📚 Learn 💼 Work 😴 Survive”

@thoniahilary Using Rook for notes userook.app

What makes you a good programmer, in one sentence

😂😭

@Sarthak4Alpha Good list, we have cheatsheets here github.com/maryamtb/rook/…

You’re not bad at DSA, you just haven’t practiced the basics (LeetCode) • 1 — Two Sum • 20 — Valid Parentheses • 53 — Maximum Subarray • 121 — Best Time to Buy and Sell Stock • 125 — Valid Palindrome • 141 — Linked List Cycle • 206 — Reverse Linked List • 169 — Majority Element • 217 — Contains Duplicate • 242 — Valid Anagram • 268 — Missing Number • 283 — Move Zeroes • 704 — Binary Search Master these… and you’ve already covered 70% of beginner DSA patterns.

@heydikshant Taking coding notes

Good Morning 🌄 What are you working on today??

@YashHustle_22 clean notes

When coding your app, what do you optimize for? * speed to ship * clean code