February 10, 2019With TypeScript 2.1, mapped types were added to the language in December 2016. As of TypeScript 2.8, mapped types have gained the ability to add or remove a particular modifier from a property. Previously, it was only possible to add modifiers to properties, but not remove them. #The ? Property Modifier You can make any property of an object type optional by adding a ? after the p
The clean architecture is the opposite of spaghetti code, where everything is interlaced and there are no single elements that can be easily detached from the rest and replaced without the whole system collapsing. The main point of the clean architecture is to make clear "what is where and why", and this should be your first concern while you design and implement a software system, whatever archit
date-fns provides the most comprehensive yet simple and consistent toolset for manipulating JavaScript dates in a browser & Node.js.
Amazon (PowerPoint, slide #15): 100 ms of latency resulted in 1% less sales. Google (video): 500 ms caused a 20% drop in traffic. Walmart (slide #46): a 100 ms improvement brought up to 1% incremental revenue. Mozilla: Shaving 2.2 seconds off page load time increased downloads by 15.4%. Yahoo: 400 ms resulted in a 5 to 9% drop in traffic. Cheating latency instant.page uses just-in-time preloading
SWC is an extensible Rust-based platform for the next generation of fast developer tools. It's used by tools like Next.js, Parcel, and Deno, as well as companies like Vercel, ByteDance, Tencent, Shopify, and more. SWC can be used for both compilation and bundling. For compilation, it takes JavaScript / TypeScript files using modern JavaScript features and outputs valid code that is supported by al
Building Software Systems at Google and Lessons Learned Jeff Dean jeff@google.com Plan for Today • Evolution of various systems at Google –computing hardware –core search systems –infrastructure software • Techniques for building large-scale systems –decomposition into services –design patterns for performance & reliability –Joint work with many, many people • # docs: tens of millions to tens of b
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