--- title: "#eli5 articles | Hashnode" description: "Explore 133 articles tagged #eli5 on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/eli5" --- Tag # #eli5 133 posts ยท 0 followers [Sreekar Reddy](https://hashnode.com/@esreekarreddy) ยท [May 10](https://hashnode.com/posts/maps-eli5-mp0dabl8/6a010bed90bb86a8fd8a8291) ### [๐Ÿ—บ๏ธ 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 ๐Ÿ‘‰ Full deep-dive with code examples The Phone Book Analogy Remember phone books? Find "Smith" โ†’ Flip directly to S section Look up the name โ†’ Get the phone number You don't scan from the beginning! Maps w... 2 min read ยท [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/maps-eli5-mp0dabl8?utm_source=hashnode&utm_medium=feed) [Sreekar Reddy](https://hashnode.com/@esreekarreddy) ยท [May 9](https://hashnode.com/posts/sets-eli5-moyxsbor/69ffba09f08d1851bf741fd8) ### [๐ŸŽฏ 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 ๐Ÿ‘‰ Full deep-dive with code examples The Guest List Analogy You're making a party guest list: Add "Alice" โ†’ Alice is on the list Add "Bob" โ†’ Bob is on the list Add "Alice" again โ†’ Nothing happens! She's... 2 min read ยท [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/sets-eli5-moyxsbor?utm_source=hashnode&utm_medium=feed) [Sreekar Reddy](https://hashnode.com/@esreekarreddy) ยท [May 8](https://hashnode.com/posts/tries-eli5-moxilx6t/69fe6a42219461ea8fac291c) ### [๐Ÿ”ค 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 ๐Ÿ‘‰ Full deep-dive with code examples The Autocomplete Analogy When you type on your phone: Type "hel" โ†’ Suggestions: "hello", "help", "helicopter" Type "help" โ†’ Suggestions: "help", "helpful", "h... 2 min read ยท [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/tries-eli5-moxilx6t?utm_source=hashnode&utm_medium=feed) [Sreekar Reddy](https://hashnode.com/@esreekarreddy) ยท [May 7](https://hashnode.com/posts/binary-trees-eli5-mow3btd5/69fd19ce052539c64142a765) ### [๐ŸŒฒ 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 ๐Ÿ‘‰ 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 ยท [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/binary-trees-eli5-mow3btd5?utm_source=hashnode&utm_medium=feed) [Sreekar Reddy](https://hashnode.com/@esreekarreddy) ยท [May 6](https://hashnode.com/posts/web-accessibility-eli5-mounmjof/69fbc696b44382c594aa73ad) ### [โ™ฟ 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 ๐Ÿ‘‰ 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 ยท [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/web-accessibility-eli5-mounmjof?utm_source=hashnode&utm_medium=feed) [Sreekar Reddy](https://hashnode.com/@esreekarreddy) ยท [May 5](https://hashnode.com/posts/web-components-eli5-mot8atqa/69fa75d70d09bfb8cc7001a7) ### [๐Ÿงฉ Web Components Explained Like You're 5](https://esreekarreddy.hashnode.dev/web-components-eli5-mot8atqa?utm_source=hashnode&utm_medium=feed) Reusable custom HTML elements Day 131 of 149 ๐Ÿ‘‰ Full deep-dive with code examples The LEGO Brick Analogy LEGO bricks are reusable building blocks: Each brick works independently Combine them to build anything Same brick works in any LEGO set Web C... 2 min read ยท [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/web-components-eli5-mot8atqa?utm_source=hashnode&utm_medium=feed) [Sreekar Reddy](https://hashnode.com/@esreekarreddy) ยท [May 4](https://hashnode.com/posts/progressive-web-apps-eli5-morsvhqx/69f9246f01c1d675cacb1105) ### [๐Ÿ“ฑ Progressive Web Apps Explained Like You're 5](https://esreekarreddy.hashnode.dev/progressive-web-apps-eli5-morsvhqx?utm_source=hashnode&utm_medium=feed) Websites that feel like apps Day 130 of 149 ๐Ÿ‘‰ Full deep-dive with code examples The Best of Both Worlds Analogy You want pizza: Restaurant: Great experience, but you have to go there Delivery: Comes to you, but takes time each order Home oven with... 2 min read ยท [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/progressive-web-apps-eli5-morsvhqx?utm_source=hashnode&utm_medium=feed) [Sreekar Reddy](https://hashnode.com/@esreekarreddy) ยท [May 3](https://hashnode.com/posts/ssr-csr-eli5-moqcyory/69f7cfd9139877d0e04e4f5f) ### [๐Ÿ–ฅ๏ธ SSR vs CSR Explained Like You're 5](https://esreekarreddy.hashnode.dev/ssr-csr-eli5-moqcyory?utm_source=hashnode&utm_medium=feed) Where your page gets rendered Day 129 of 149 ๐Ÿ‘‰ Full deep-dive with code examples The Restaurant Analogy Two types of restaurants: Full-service restaurant (SSR): Kitchen prepares complete meal Served ready to eat You just enjoy it Build-your-own t... 2 min read ยท [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/ssr-csr-eli5-moqcyory?utm_source=hashnode&utm_medium=feed) [Sreekar Reddy](https://hashnode.com/@esreekarreddy) ยท [May 2](https://hashnode.com/posts/rest-api-eli5-mooxj8uk/69f67e6c060ecd3e92dedc67) ### [๐Ÿ“ฎ REST API Explained Like You're 5](https://esreekarreddy.hashnode.dev/rest-api-eli5-mooxj8uk?utm_source=hashnode&utm_medium=feed) Web services using HTTP verbs Day 128 of 149 ๐Ÿ‘‰ Full deep-dive with code examples The Library Analogy A library with standard commands: GET a book - Receive book POST a book - Donate new book PUT a book - Replace with updated version DELETE a book ... 1 min read ยท [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/rest-api-eli5-mooxj8uk?utm_source=hashnode&utm_medium=feed) [Sreekar Reddy](https://hashnode.com/@esreekarreddy) ยท [May 1](https://hashnode.com/posts/database-migrations-eli5-monidin6/69f52ec44362847ec8f78928) ### [๐Ÿš› Database Migrations Explained Like You're 5](https://esreekarreddy.hashnode.dev/database-migrations-eli5-monidin6?utm_source=hashnode&utm_medium=feed) Version control for database schema Day 127 of 149 ๐Ÿ‘‰ Full deep-dive with code examples The Recipe Card Analogy Your grandma's recipe evolves: Version 1: Original recipe Version 2: Add a pinch of salt Version 3: Use brown sugar instead of white Eac... 2 min read ยท [esreekarreddy.hashnode.dev](https://esreekarreddy.hashnode.dev/database-migrations-eli5-monidin6?utm_source=hashnode&utm_medium=feed)