🔥 🌟 Master Date Math in JavaScript 📅 | 🛠️ Calculate Days Between Dates with Ease! ⏱️

Daily Issue #117 | Subscribe to DS | Daily Sandbox Pro

Hello Developers!

Discover how Flask makes building Python-backed web apps simple with Raymond Camden’s blog example. Learn to create smart object builders that simplify life for both clients and developers. Explore the evolving role of the “Design Engineer” and its significance in 2025.

Get a sneak peek into CSS features like sibling-count() and sibling-index(), and check out the winning projects from Google’s Chrome Built-in AI Challenge. Find out why simplicity in learning models improves neural networks and sharpen your skills with The Ultimate Guide to Git Multitasking.

Streamline your projects with tools like OpenMCT, NASA's framework for visualizing telemetry data, and Appium, an open-source automation tool for mobile, desktop, and IoT platforms. Build high-performance web applications with Overture, and secure them using OTPAUTH for one-time password generation across multiple environments.

Dive in and keep coding!

• Simple Blog Example in Flask - Raymond Camden is exploring Flask to build Python-backed web apps and finds its simplicity impressive, reminiscent of his first experience with Express.

• Make Life Easier for your Developer Client’s with Smart Object Builders - We often focus on simplifying life for clients, but what about the developers who work with your code? They deserve simplicity too.

• 2025: The Rise of the “Design Engineer”? - The emergence of this title has been brewing for years. Once dubbed 'Rockstar Web Designer' or 'Unicorn,' the field has evolved. But what exactly is a “Design Engineer” and how prominent will it become in 2025?

• How to Wait for the sibling-count() and sibling-index() Functions - CSS features like sibling-count() and sibling-index() take time to develop, going through discussions, testing, and prototypes. Developers just have to wait patiently for their release.

• Winners of the Built-in AI Challenge - Last October, Google launched the Chrome Built-in AI Challenge, inviting participants to create web apps or Chrome Extensions using Chrome AI APIs with Gemini Nano. Over 8,600 people submitted more than 650 projects, and winners were selected based on functionality, purpose, content, user experience, and technical execution.

• Learning Made Simple: Why Complex Plans Fail - Salvatore Raieli explores how simplicity in model design and training enhances generalization and the grokking phenomenon in neural networks.

• The Ultimate Guide to Git Multitasking - Master the art of choosing the perfect strategy to streamline your workflow.

More news here →

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Learn more about our production ready RAG tooling here.

Find the Difference between Two Dates in Days (in vanilla JS)

The dateDifferenceInDays function calculates the absolute number of days between two dates by converting their difference in milliseconds to days.

const dateDifferenceInDays = (date1, date2) => 
  Math.abs(Math.floor((date2 - date1) / (1000 * 60 * 60 * 24)));

const date1 = new Date('2023-01-01');
const date2 = new Date('2023-01-10');
console.log(dateDifferenceInDays(date1, date2)); // Output: 9

const date3 = new Date('2023-12-25');
const date4 = new Date('2024-01-01');
console.log(dateDifferenceInDays(date3, date4)); // Output: 7

How it works:

1. Subtract Dates: Subtract date1 from date2 to get the difference in milliseconds.

2. Convert to Days: Divide by 1000 * 60 * 60 * 24 to convert milliseconds to days.

3. Absolute Value: Use Math.abs to ensure the result is positive, regardless of date order.

4. Round Down: Use Math.floor to avoid partial days.

More code snippets here →

• lms - A user-friendly learning system designed to organize and structure your content seamlessly, making it easier to deliver effective learning experiences.

• openmct - A next-gen, open-source mission control framework developed by NASA's Ames Research Center for visualizing and analyzing telemetry data. Used in spacecraft missions and rover operations, it’s a powerful tool for planning, operating, and analyzing any system producing telemetry data, adaptable for both desktop and mobile devices.

• overture - a powerful JS library for building really slick web applications, with performance at, or surpassing, native apps.

• otpauth - One Time Password (HOTP/TOTP) library for Node.js, Deno, Bun and browsers.

• appium - An open-source, cross-platform automation framework built on the W3C WebDriver protocol. Appium enables automation for mobile, desktop, and IoT platforms, offering modularity, extensibility, and support for multiple programming languages. Its robust ecosystem provides tools and software for diverse automation needs.

More code libs here →

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