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JavaScript
JavaScript
Aug 27, 2025 · Frontend Development

Turn Any Site Dark with One CSS Line: How Filter Invert & Hue‑Rotate Work

This article shows how a single CSS rule using the filter property with invert(1) and hue‑rotate(180deg) can instantly give any website a decent dark‑mode appearance, explains the underlying colour transformations, and provides simple fixes for media elements that get unintentionally inverted.

CSSDark ModeWeb Design
0 likes · 5 min read
Turn Any Site Dark with One CSS Line: How Filter Invert & Hue‑Rotate Work
21CTO
21CTO
Jul 10, 2024 · Information Security

Did a Hacker Breach OpenAI’s Internal AI Discussions? Implications for Security

A New York Times report reveals that a hacker accessed OpenAI's internal messaging system, exposing employee discussions on AI advancements and sparking concerns about foreign espionage, internal security practices, and the broader national‑security implications of AI technology.

AI researchAI securityOpenAI
0 likes · 4 min read
Did a Hacker Breach OpenAI’s Internal AI Discussions? Implications for Security
21CTO
21CTO
May 16, 2023 · Fundamentals

Top 7 Beautiful Terminal Fonts to Boost Code Readability

Discover a curated list of seven attractive terminal fonts that enhance visual appeal, improve readability, reduce eye strain, and provide a more enjoyable coding experience for programmers, system administrators, and Linux enthusiasts alike.

CascadiaFira CodeInconsolata
0 likes · 5 min read
Top 7 Beautiful Terminal Fonts to Boost Code Readability
21CTO
21CTO
Jul 28, 2022 · Backend Development

Why Meta Chose Rust, Hack, Python, and C++ as Its Core Backend Languages

Meta has officially added Rust, Hack, Python, and C++ as its preferred backend languages, outlining strict criteria such as core library support, security, operational risk, expertise, and developer experience, while also noting community‑supported languages and its long‑term commitment to Rust amid broader VR ambitions.

Backend DevelopmentC++Meta
0 likes · 6 min read
Why Meta Chose Rust, Hack, Python, and C++ as Its Core Backend Languages
Laravel Tech Community
Laravel Tech Community
Feb 27, 2021 · Backend Development

HHVM 4.98 Release: New Features, Major Changes, and Upcoming Deprecations

HHVM 4.98 has been officially released, ending support for version 4.92 while continuing maintenance for 4.93‑4.97 and LTS releases, introducing minor typechecker improvements, new error detection for conflicting constants, and outlining future deprecations such as the inst_meth function and stricter string concatenation rules.

Backend DevelopmentRuntime ConfigurationTypechecker
0 likes · 3 min read
HHVM 4.98 Release: New Features, Major Changes, and Upcoming Deprecations
21CTO
21CTO
Sep 15, 2018 · Backend Development

Why HHVM Is Dropping PHP Support and What It Means for Developers

Facebook's HHVM team announced that version 3.30 will be the last to support PHP, outlining a timeline for dropping PHP, recommending migration to Hack or PHP 7, and detailing 2018‑19 open‑source plans to ease the transition and improve tooling.

BackendPHPRuntime
0 likes · 4 min read
Why HHVM Is Dropping PHP Support and What It Means for Developers
21CTO
21CTO
Sep 22, 2017 · Backend Development

Why Facebook’s HHVM Is Shifting from PHP 7 to Hack: The Backend Evolution

Facebook’s HHVM team announced that, due to major compatibility issues between PHP 7 and PHP 5, they will gradually abandon PHP support in favor of the Hack language, aiming for better performance, type safety, and a dedicated ecosystem while phasing out PHP 5 compatibility.

PHPhackhhvm
0 likes · 4 min read
Why Facebook’s HHVM Is Shifting from PHP 7 to Hack: The Backend Evolution
Qunar Tech Salon
Qunar Tech Salon
May 13, 2015 · R&D Management

Facebook's Engineering Culture and R&D Management Practices

The talk explains Facebook's early engineering culture—emphasizing rapid "Hack" iterations, a decentralized organization that avoids dependencies, open code‑base ownership, data‑driven debate, and the strategic hiring of strong engineers—to illustrate how these practices drive high‑speed product development.

DecentralizationEngineering CultureFacebook
0 likes · 17 min read
Facebook's Engineering Culture and R&D Management Practices
Baidu Tech Salon
Baidu Tech Salon
Mar 19, 2014 · Backend Development

Understanding HHVM: Facebook's High-Performance PHP Virtual Machine and Its JIT Optimization

HHVM, Facebook’s high‑performance PHP virtual machine, uses a type‑driven tracelet JIT and custom bytecode to achieve up to nine‑fold speed gains, making runtime optimization the only practical solution for Facebook’s massive codebase while requiring careful compatibility testing, memory management, and Hack language support.

Backend DevelopmentFacebookJIT
0 likes · 18 min read
Understanding HHVM: Facebook's High-Performance PHP Virtual Machine and Its JIT Optimization