--- title: "#hashtables articles | Hashnode" description: "Explore 24 articles tagged #hashtables on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/hashtables" --- Tag # #hashtables 24 posts · 2 followers [Vidit Vats](https://hashnode.com/@vidit2000) · [Jul 15](https://hashnode.com/posts/lc-1-two-sum-problem/6a577d47bd06dda76099471f) ### [LC-1 Two Sum Problem](https://dsa-decoded.hashnode.dev/lc-1-two-sum-problem?utm_source=hashnode&utm_medium=feed) Problem Statement 2 min read · [dsa-decoded.hashnode.dev](https://dsa-decoded.hashnode.dev/lc-1-two-sum-problem?utm_source=hashnode&utm_medium=feed) [Madhura Anand](https://hashnode.com/@madhura-anand) · [Jul 25, 2025](https://hashnode.com/posts/inside-python-dictionaries-a-deep-dive-into-hashing-and-collision-handling/6882e47da77bab3709f2988c) ### [Inside Python Dictionaries: A Deep Dive into Hashing and Collision Handling](https://madhura.hashnode.dev/inside-python-dictionaries-a-deep-dive-into-hashing-and-collision-handling?utm_source=hashnode&utm_medium=feed) Open up any Python program, and chances are — you'll see a dictionary at work. It might be mapping names to emails, product IDs to prices, or coordinates to sensor readings. On the surface, it's just a bunch of key–value pairs. But under the hood? A ... 6 min read · [madhura.hashnode.dev](https://madhura.hashnode.dev/inside-python-dictionaries-a-deep-dive-into-hashing-and-collision-handling?utm_source=hashnode&utm_medium=feed) [Anni Huang](https://hashnode.com/@HuangAnni) · [Jun 22, 2025](https://hashnode.com/posts/leetcode-daily-challenge-3085-minimum-deletions-to-make-string-k-special/68578820b1c1212302ce77e5) ### [LeetCode Daily Challenge-3085. Minimum Deletions to Make String K-Special](https://huanganni.hashnode.dev/leetcode-daily-challenge-3085-minimum-deletions-to-make-string-k-special?utm_source=hashnode&utm_medium=feed) Greedy Algorithms Can Miss Global Optimums: Why Always Targeting the Maximum Isn't Always Optimal 5 min read · [huanganni.hashnode.dev](https://huanganni.hashnode.dev/leetcode-daily-challenge-3085-minimum-deletions-to-make-string-k-special?utm_source=hashnode&utm_medium=feed) [kasumbi phil](https://hashnode.com/@kasumbi) · [Jun 10, 2025](https://hashnode.com/posts/today-i-learned-hash-tables-collisions-resizing-and-a-duplicate-finder-in-python/68488d0f9f28f95bd035bd64) ### [🔍 Today I Learned Hash Tables — Collisions, Resizing, and a Duplicate Finder in Python](https://kasumbidatastructures.hashnode.dev/today-i-learned-hash-tables-collisions-resizing-and-a-duplicate-finder-in-python?utm_source=hashnode&utm_medium=feed) 📘 What are Hash Tables? A hash table (also known as a dictionary or map) stores data in key-value pairs. It's like a super-fast lookup table. Example: student\_scores = { "Alice": 90, "Bob": 85, "Charlie": 78 } Keys ("Alice") are hashed... 2 min read · [kasumbidatastructures.hashnode.dev](https://kasumbidatastructures.hashnode.dev/today-i-learned-hash-tables-collisions-resizing-and-a-duplicate-finder-in-python?utm_source=hashnode&utm_medium=feed) [Sanchit Jain](https://hashnode.com/@En1gma) · [May 24, 2025](https://hashnode.com/posts/inside-hash-tables/683242be435b82ed845a8ff9) ### [Inside Hash Tables](https://sanchitjain.hashnode.dev/inside-hash-tables?utm_source=hashnode&utm_medium=feed) Hash tables are a fundamental data structure used widely in computer science for their efficiency in storing and retrieving data. They offer average-case constant time complexity for operations like insertion, deletion, and lookup, making them ideal ... 7 min read · [sanchitjain.hashnode.dev](https://sanchitjain.hashnode.dev/inside-hash-tables?utm_source=hashnode&utm_medium=feed) [Nitin Singh](https://hashnode.com/@ns717) · [May 12, 2025](https://hashnode.com/posts/hash-tables-fast-lookups-with-key-value-mapping/68223e352fcee9a162cff3d4) ### [🧱 Hash Tables](https://ns717.hashnode.dev/hash-tables-fast-lookups-with-key-value-mapping?utm_source=hashnode&utm_medium=feed) Fast Lookups with Key-Value Mapping 5 min read · [ns717.hashnode.dev](https://ns717.hashnode.dev/hash-tables-fast-lookups-with-key-value-mapping?utm_source=hashnode&utm_medium=feed) [khushaalan](https://hashnode.com/@khushaalan) · [Feb 12, 2025](https://hashnode.com/posts/two-sum/67abe694a091178dcbf5b4c8) ### [Two Sum](https://khushaalan.hashnode.dev/two-sum?utm_source=hashnode&utm_medium=feed) Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You may assume that each input would have exactly one solution, and you may not use the same element twice. You can return the a... 1 min read · [khushaalan.hashnode.dev](https://khushaalan.hashnode.dev/two-sum?utm_source=hashnode&utm_medium=feed) [Arka Infotech](https://hashnode.com/@arkainfotech) · [Jan 10, 2025](https://hashnode.com/posts/hashing-in-data-structures-techniques-and-algorithms/67810b55bf9e0d939fba523a) ### [Hashing in Data Structures: Techniques and Algorithms](https://blogs.arkainfotech.in/hashing-in-data-structures-techniques-and-algorithms?utm_source=hashnode&utm_medium=feed) Discover the power of hashing, its techniques, and algorithms to optimize data retrieval in data structures like hash tables, sets, and maps 6 min read · [blogs.arkainfotech.in](https://blogs.arkainfotech.in/hashing-in-data-structures-techniques-and-algorithms?utm_source=hashnode&utm_medium=feed) [Ahamad Basha NS](https://hashnode.com/@AhamadNSAB) · [Dec 13, 2024](https://hashnode.com/posts/hash-tables-a-deep-dive-into-c/675c888187ef85d890185e78) ### [Hash Tables: A Deep Dive into C#](https://intro-to-c-net-core.hashnode.dev/hash-tables-a-deep-dive-into-c?utm_source=hashnode&utm_medium=feed) Imagine you have a big toy box. You want to store your toys in an organized way, so you decide to put similar toys together. For example, all your cars go in one section, all your dolls in another, and all your blocks in a third. That's kind of how a... 4 min read · [intro-to-c-net-core.hashnode.dev](https://intro-to-c-net-core.hashnode.dev/hash-tables-a-deep-dive-into-c?utm_source=hashnode&utm_medium=feed) [Vishad Patel](https://hashnode.com/@vishadtech09) · [Aug 4, 2024](https://hashnode.com/posts/leetcode-two-sum-problem-explained-a-simple-guide/66af0d499617d4a77251f5ce) ### [Leetcode Two Sum Problem Explained: A Simple Guide](https://vishad.hashnode.dev/leetcode-two-sum-problem-explained-a-simple-guide?utm_source=hashnode&utm_medium=feed) Leetcode - Two Sum 4 min read · [vishad.hashnode.dev](https://vishad.hashnode.dev/leetcode-two-sum-problem-explained-a-simple-guide?utm_source=hashnode&utm_medium=feed)