Dsa Js

***Senior Engineering Review: Neel-shetty/dsa-js*** ### 1. Code Quality & Patterns * The core pattern observed is highly efficient **Dynamic Programming**, specifically **memoized recursion** (top-down approach). * Implementations, like `fib` and `gridTraveller`, correctly utilize hash maps (`memo` objects) to convert exponential runtime to efficient polynomial time complexity. * Base cases and key generation (e.g., `m + ',' + n` in `gridTraveller`) are logically sound and standard for algorithmic programming. ### 2. Language-Specific Observations * The code effectively uses modern JavaScript features, including `const` declarations and **ES6 default parameters** (`memo={}`) for clean recursive state initialization. * Key generation via string concatenation for object keys is idiomatic JavaScript for handling composite inputs in a hash table context. * Performance could slightly benefit from using `Map` instead of a plain `{}` object for `memo` if the keys were non-string types, though here the current usage is acceptable. ### 3. Code Structure * The directory structure is appropriate, grouping related algorithms under the `dp/` folder, which is good **separation of concerns** for DSA content. * Functions are self-contained and focused solely on solving the specific recursive problem, exhibiting high functional cohesion. * A minor structural issue is the inclusion of debugging output (`console.log`) directly within the calculation function body in `dpFib.js`. ### 4. Specific Improvements * **Remove the internal debugging** `console.log` statement from `dpFib.js` to promote function purity and clean module execution. * For completeness, consider implementing **iterative tabulation solutions** alongside the recursive memoized versions for a complete DP comparison. * Standardize input validation; for example, ensure inputs to `fib` and `gridTraveller` are non-negative integers before starting computation. *** ### Impactful Insights Summary * Implements **efficient memoization** patterns, effectively solving classic Dynamic Programming problems. * Leverages **ES6 default parameters** and `const` declarations, demonstrating modern JavaScript usage standards. * The project exhibits strong algorithmic organization, neatly separating concepts into the `dp/` module structure. * **Remove the debugging side effect** (`console.log`) from `dpFib.js` to maintain functional clarity and purity. * Consider adding corresponding **tabulation (bottom-up)** solutions to diversify the DP examples.