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JS/TS not a functional language: technical analysis

https://sudonull.com/js-ts-not-a-functional-language-technical-analysis

Why JavaScript and TypeScript Are Not Functional Languages? Breaking Down 4 Technical Reasons: mutability, recursion, lazy collections, error handling. Consequences for development.

JS Closures: Lexical Environment and Examples

https://sudonull.com/js-closures-lexical-environment-and-examples

Breakdown of Closures in JavaScript: from Lambda Calculus to Loops, Events, and Optimization. Code Examples for Middle/Senior. Master the State Encapsulation Mechanism.

gnata: JSONata on Go with AI for $400

https://sudonull.com/gnata-jsonata-on-go-with-ai-for-400

Engineer Reco ported JSONata to Go with Cursor: 1000x speedup, $500k savings. Process details, tests, shadow deployment. For Go developers.

Node.js 2026 Courses: Top for Backend

https://sudonull.com/node-js-2026-courses-top-for-backend

Choose a Node.js course for start in 2026: comparison Skillbox, Yandex Practicum, Netology. Salaries, AI skills, employment. Start API development from scratch — read the review.

URL as the source of state Next.js App Router

https://sudonull.com/url-as-the-source-of-state-next-js-app-router

How to make URL the single source of truth in Next.js App Router. Server components, searchParams, client synchronization. Code examples for middle/senior.

From other projects

JSM Beauty: Korean pop-up with glass skin in New York

https://ymaho.com/jsm-beauty-korean-pop-up-with-glass-skin-in-new-york

The Korean pop-up JSM Beauty in New York ended with AI diagnostics and master classes. Learn how K-beauty is conquering the USA. Read more.

J&J's OTTAVA Robot: Trials and a Shift in the Surgery Market

https://ymaho.com/j-j-s-ottava-robot-trials-and-a-shift-in-the-surgery-market

J&J tested the OTTAVA robot with table-integrated arms for bariatric surgery. The system works in cramped operating rooms, reducing hospital costs. Learn how this will change the market.

J&J Ottava robot: first clinical trials successfully completed

https://ymaho.com/j-j-ottava-robot-first-clinical-trials-successfully-completed

J&J's surgical robot Ottava has passed first clinical trials in bariatric surgery. Learn about the advantages of the innovative system and its impact on the robotic surgery market.

From the web

Nullish coalescing operator (??) - JavaScript | MDN

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing

Aug 26, 2025 · The nullish coalescing (??) operator is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined, and otherwise returns its left-hand side …

JavaScript Tutorial - W3Schools

https://www.w3schools.com/Js/

W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.

JavaScript Logical Operators - W3Schools

https://www.w3schools.com/Js/js_logical.asp

W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.

JavaScript | MDN

https://developer.mozilla.org/en-US/docs/Web/JavaScript

May 22, 2026 · JavaScript (JS) is a lightweight interpreted (or just-in-time compiled) programming language with first-class functions. While it is most well-known as the scripting language for Web …

The Modern JavaScript Tutorial

https://javascript.info/

2 days ago · Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more.

Free Javascript challenges online | JSchallenger

https://www.jschallenger.com/

Free Javascript challenges. Learn Javascript online by solving coding exercises. Javascript for all levels. Solve Javascript tasks from beginner to advanced levels.

Node.js — Run JavaScript Everywhere

https://nodejs.org/

Node.js® is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.

JavaScript Tutorial

https://www.javascripttutorial.net/

JavaScript Tutorial provides you with many practical tutorials that help you learn JavaScript from scratch quickly and effectively.

How the Question Mark (?) Operator Works in JavaScript

https://www.freecodecamp.org/news/how-the-question-mark-works-in-javascript/

Feb 3, 2021 · By Nishant Kumar The conditional or question mark operator, represented by a ?, is one of the most powerful features in JavaScript. The ? operator is used in conditional statements, and when …

When should I use ?? (nullish coalescing) vs || (logical OR)?

https://stackoverflow.com/questions/61480993/when-should-i-use-nullish-coalescing-vs-logical-or

While the ?? operator isn't available in current LTS versions of Node (v10 and v12), you can use it with some versions of TypeScript or Node: The ?? operator was added to TypeScript 3.7 back in …

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