--- title: "Sreekar Reddy (@esreekarreddy) | Hashnode" description: "AI engineer in making. Explaining tech like you're 5. Read the latest articles by Sreekar Reddy on Hashnode." url: "https://hashnode.com/@esreekarreddy" --- @esreekarreddy # Sreekar Reddy @esreekarreddy Β· Sydney, Australia Β· Joined December 2025 AI engineer in making. Explaining tech like you're 5. [Website](https://www.sreekarreddy.com/) ### [πŸ—ΊοΈ Maps Explained Like You're 5](https://esreekarreddy.hashnode.dev/maps-eli5-mp0dabl8?utm_source=hashnode&utm_medium=feed) Key-value pairs for lookup Day 136 of 149 πŸ‘‰ Full deep-dive with code examples The Phone Book Analogy Remember phone books? Find "Smith" β†’ Flip directly to S section Look up the name β†’ Get the phone number You don't scan from the beginning! Maps w... 2 min read Β· [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/maps-eli5-mp0dabl8?utm_source=hashnode&utm_medium=feed) [May 10](https://hashnode.com/posts/maps-eli5-mp0dabl8/6a010bed90bb86a8fd8a8291) ### [🎯 Sets Explained Like You're 5](https://esreekarreddy.hashnode.dev/sets-eli5-moyxsbor?utm_source=hashnode&utm_medium=feed) Collections with no duplicates Day 135 of 149 πŸ‘‰ Full deep-dive with code examples The Guest List Analogy You're making a party guest list: Add "Alice" β†’ Alice is on the list Add "Bob" β†’ Bob is on the list Add "Alice" again β†’ Nothing happens! She's... 2 min read Β· [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/sets-eli5-moyxsbor?utm_source=hashnode&utm_medium=feed) [May 9](https://hashnode.com/posts/sets-eli5-moyxsbor/69ffba09f08d1851bf741fd8) ### [πŸ”€ Tries Explained Like You're 5](https://esreekarreddy.hashnode.dev/tries-eli5-moxilx6t?utm_source=hashnode&utm_medium=feed) Trees for storing strings efficiently Day 134 of 149 πŸ‘‰ Full deep-dive with code examples The Autocomplete Analogy When you type on your phone: Type "hel" β†’ Suggestions: "hello", "help", "helicopter" Type "help" β†’ Suggestions: "help", "helpful", "h... 2 min read Β· [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/tries-eli5-moxilx6t?utm_source=hashnode&utm_medium=feed) [May 8](https://hashnode.com/posts/tries-eli5-moxilx6t/69fe6a42219461ea8fac291c) ### [🌲 Binary Trees Explained Like You're 5](https://esreekarreddy.hashnode.dev/binary-trees-eli5-mow3btd5?utm_source=hashnode&utm_medium=feed) Each node has at most two children Day 133 of 149 πŸ‘‰ Full deep-dive with code examples The Family Tree Analogy Imagine a family tree where each person can have at most two children. The top person is the root, with branches going down. A binary tree... 2 min read Β· [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/binary-trees-eli5-mow3btd5?utm_source=hashnode&utm_medium=feed) [May 7](https://hashnode.com/posts/binary-trees-eli5-mow3btd5/69fd19ce052539c64142a765) ### [β™Ώ Web Accessibility Explained Like You're 5](https://esreekarreddy.hashnode.dev/web-accessibility-eli5-mounmjof?utm_source=hashnode&utm_medium=feed) Making websites usable for everyone Day 132 of 149 πŸ‘‰ Full deep-dive with code examples The Curb Cut Analogy Curb cuts (ramps in sidewalks) were designed for wheelchairs, but help everyone: Parents with strollers People with luggage Delivery worker... 2 min read Β· [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/web-accessibility-eli5-mounmjof?utm_source=hashnode&utm_medium=feed) [May 6](https://hashnode.com/posts/web-accessibility-eli5-mounmjof/69fbc696b44382c594aa73ad)