---
title: "Rahul Kumar (@rahul-713) | Hashnode"
description: "Engineer crafting AI and data science solutions. Read the latest articles by Rahul Kumar on Hashnode."
url: "https://hashnode.com/@rahul-713"
---

@rahul-713

# Rahul Kumar

@rahul-713 · New Delhi , India · Joined December 2024

Engineer crafting AI and data science solutions.

### [The Dynamic Path – Mastering Dynamic Programming, One Thought at a Time](https://data-structures-and-algorithms-notes.hashnode.dev/the-dynamic-path-mastering-dynamic-programming-one-thought-at-a-time?utm_source=hashnode&utm_medium=feed)

Master dynamic programming using recursion, memoization, and optimization. Simplify complex problems with structured thinking

6 min read · [data-structures-and-algorithms-notes.hashnode.dev](https://data-structures-and-algorithms-notes.hashnode.dev/the-dynamic-path-mastering-dynamic-programming-one-thought-at-a-time?utm_source=hashnode&utm_medium=feed)

[Nov 4, 2025](https://hashnode.com/posts/the-dynamic-path-mastering-dynamic-programming-one-thought-at-a-time/6909f1db2b6dabdf723dac29)

### [String Algorithms](https://data-structures-and-algorithms-notes.hashnode.dev/string-algorithms?utm_source=hashnode&utm_medium=feed)

Explore KMP, Rabin-Karp, Boyer-Moore, Z, Aho-Corasick, Manacher's, Huffman Encoding, and Trie with code examples

19 min read · [data-structures-and-algorithms-notes.hashnode.dev](https://data-structures-and-algorithms-notes.hashnode.dev/string-algorithms?utm_source=hashnode&utm_medium=feed)

[Nov 3, 2025](https://hashnode.com/posts/string-algorithms/6908a078f18dc6ac099109ad)

### [Searching and Sorting Algorithms](https://data-structures-and-algorithms-notes.hashnode.dev/searching-and-sorting-algorithms?utm_source=hashnode&utm_medium=feed)

Learn binary search, merge sort, quick sort, and more with time complexities and code examples

18 min read · [data-structures-and-algorithms-notes.hashnode.dev](https://data-structures-and-algorithms-notes.hashnode.dev/searching-and-sorting-algorithms?utm_source=hashnode&utm_medium=feed)

[Nov 2, 2025](https://hashnode.com/posts/searching-and-sorting-algorithms/69074ed20c19f35935a3a24a)

### [Understanding Root Mean Squared Logarithmic Error ( RMSLE )](https://data-science-notes.hashnode.dev/understanding-root-mean-squared-logarithmic-error-rmsle?utm_source=hashnode&utm_medium=feed)

Explaination A. What is RMSLE? RMSLE is an evaluation metric used for regression problems. It measures the ratio-based difference between predicted and actual values rather than absolute differences. RMSLE is especially useful when: You care more ab...

2 min read · [data-science-notes.hashnode.dev](https://data-science-notes.hashnode.dev/understanding-root-mean-squared-logarithmic-error-rmsle?utm_source=hashnode&utm_medium=feed)

[May 7, 2025](https://hashnode.com/posts/understanding-root-mean-squared-logarithmic-error-rmsle/681b2cc6c10ba567444e4810)

### [🧠 Zero to Hero : Text Vectorization](https://data-science-notes.hashnode.dev/zero-to-hero-text-vectorization?utm_source=hashnode&utm_medium=feed)

📌 What is Text Vectorization? In NLP, machines can’t understand text directly — they understand numbers. Text vectorization is the process of converting textual data into numerical vectors so that we can feed them into machine learning or deep learn...

8 min read · [data-science-notes.hashnode.dev](https://data-science-notes.hashnode.dev/zero-to-hero-text-vectorization?utm_source=hashnode&utm_medium=feed)

[Apr 13, 2025](https://hashnode.com/posts/zero-to-hero-text-vectorization/67fba25fc89db5ecb9deb56c)