Thua200
10.2K posts
@thua200
Blockchain &AI Researcher
Alex Xu's System Design Interview is the most recommended book in tech hiring. Volume 1: $39.99 on Amazon. Volume 2: $40.00 on Amazon. Both together: $79.99. Thousands of engineers have bought them. Millions have been told to buy them. Every tech interview prep list on the internet includes these two books. In December 2024, one engineer at AWS read both volumes cover to cover. His name is Gaurav Kumar. CS grad from USC. Day job at Amazon Web Services. He goes by liquidslr on GitHub. He took notes on every single chapter. Organized them by topic. Linked every section to the original research papers from Amazon, Google, and Discord. Then he pushed the whole thing to GitHub for free. Then he built a free website to read them on. He named it Pagefy. Every chapter. Every diagram concept. Every system. Free. Forever. Here is what is inside: → Chapter 1: Scale From Zero To Millions Of Users → Chapter 2: Back-of-the-Envelope Estimation → Chapter 3: A Framework For System Design Interviews → Chapter 4: Design A Rate Limiter → Chapter 5: Design Consistent Hashing → Chapter 6: Design A Key-Value Store → Chapter 7: Design A Unique ID Generator In Distributed Systems → Chapter 8: Design A URL Shortener → Chapter 9: Design A Web Crawler → Chapter 10: Design A Notification System → Chapter 11: Design A News Feed System → Chapter 12: Design A Chat System → Chapter 13: Design A Search Autocomplete System → Chapter 14: Design YouTube → Chapter 15: Design Google Drive → Chapter 16: Proximity Service And that is Volume 1. Volume 2 continues: → Nearby Friends → Google Maps → Distributed Message Queue → Metrics Monitoring and Alerting System → Ad Click Event Aggregation → Hotel Reservation System → Distributed Email Service → S3-like Object Storage → Real-Time Gaming Leaderboard → Payment System → Digital Wallet → Stock Exchange Here is why this matters: Every FAANG company asks system design questions. Google. Amazon. Meta. Microsoft. Apple. Netflix. Uber. Airbnb. Stripe. The median software engineer at these companies makes $226,000. Senior makes $312,000. Staff makes $457,000. The interview that stands between you and that salary is system design. The book that everyone says to read costs $79.99. The official video course on ByteByteGo costs $499 for lifetime or $189 a year. Hello Interview charges $279 lifetime. Educative charges $59 a month. These notes cover the same 28 chapters as the books. For $0. Not a summary. Not a cheatsheet. Structured notes with diagrams, key concepts, and source papers for every chapter of both volumes. Browse them as a website at pagefy.io. Search any topic. Jump to any chapter at 1 AM the night before the interview. 5,555 stars. 1,059 forks. One AWS engineer on his own time. One honest flag: there is no LICENSE file on the repo. These are study notes summarizing a copyrighted book. If you can afford $79.99, buy the books. Alex Xu deserves the royalty. These notes are for the night before, when you already read the book and forgot half of it. One engineer. Two books. Twenty eight chapters. Free on GitHub. The book teaches you the answers. This repo helps you remember them.
什么叫做诛心？ 作家苏芩说： "想要杀死一个人，不必用刀子， 只需日日挑他的错处， 人，永远是需要认同感的。 如果没有了被认同感， 就没有了向上的动力， 人最关心的，就是那些， 能给他带来心理满足感的人。" 人是感情动物， 对于内心感情的需求， 每个人都有着强烈的渴望， 所以毁掉一个人最快的方式， 就是不停的攻击他的内心， 扼S他的每一种情感需求。 贬低，会让一个人失去自信， 否定，会让一个人变得自卑， 诋毁，会让一个人百口莫辩， 指责，会让一个人心生愧疚， 孤立，会让一个人一蹶不振。 一个人如果没有了精气神， 也就没有了向上的动力， 这样的人灵魂空虚，浑浑噩噩， 如同行尸走肉一般的活着， 因为精神上的折磨， 才是摧毁一个人最狠的方式。 每个人都渴望爱与被爱， 渴望得到别人的认可和赞美， 小的时候，听到老师夸奖自己， 心里就像吃了糖一样的甜蜜， 成家之后得到爱人的鼓励， 内心就会感到幸福无比， 工作中听到领导的肯定， 立马干劲十足，信心百倍。 什么叫做S人诛心， 与其用刀子S掉肉体， 不如去揭露，谴责，诋毁， 折磨其内心，打压其信心， 诋毁其人品，摧毁其自尊。 这种来自于心灵上的折磨， 远比肉体上的伤害， 更加歹毒，狠辣， 让人痛不欲生，生不如S。 那些喜欢， 诋毁别人，打压别人，指责别人， 总是打消别人积极性的人， 真的是非常可恨， 所以我们一定不要成为这样的人。 良言一句三冬暖， 恶语伤人六月寒， 我们要严以律己，宽以待人， 用一颗发现美的眼睛， 多去看到别人的优点， 而不要刻意放大别人的缺点， 我们要学会赞美，学会鼓励， 而不是给别人泼冷水，拉后腿。 同样如果遇到喜欢打压别人， 遇到喜欢指责别人的人， 我们就要远离他们， 不要让他们消耗我们的能量， 绝不接受任何人的道德绑架。 多和同频的人打交道， 远离爱生事端的小人， 不伤人，但一定要有不被伤的气场， 不扎人，但身上一定要有刺， 坚守自己的立场和原则， 这样才能更好的保护自己。
中国软件著作权申请材料 生成器 Skills meta.appinn.net/t/topic/85159
