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13)Explain controlled vs uncontrolled components with useRef and useState.Controlled Components: A controlled component is one where the form data is handled by React state. The input value is linked to a state variable using useState, and whenever the user types, we update the state using onChange. This means React is in full control of the…
Becoming a parent is an expensive experience, and with rising costs and tariffs, it certainly isn’t getting cheaper. One way to help curb the insane amount of spending you’re on the hook for? Finding great deals on the gear you need, and Amazon Prime Day is a perfect opportunity. There’s plenty of baby gear you’re…
⸻ 🧠 Real-Time Comment Ranking with Kafka and Sentiment Analysis How AI can automatically push the good vibes to the top and hide the hate ⸻ ✨ Introduction Every social media platform wants to create positive interactions — but let’s be honest, not every comment section delivers that. From toxic debates to troll attacks, negative…
The waning hours of Amazon Prime Day—or Prime Big Deal Days—are the star of the show right now, but maybe you want to go shopping somewhere else. Whatever your reasoning, fear not! Plenty of other stores, big and small, are hosting sales alongside Amazon through the end of today. Everything below is hand-tested by WIRED,…
第 10 课：Freqtrade交易对选择与测试 ⏱ 课时：1.5 小时 🎯 学习目标：学会选择合适的交易对 📚 难度：⭐⭐ 回测实战 📖 课程概览 不同的交易对有不同的特性。选择合适的交易对对策略表现有巨大影响。本课将教你如何评估交易对的流动性、波动率，以及如何构建多交易对组合来分散风险。 10.1 主流币 vs 山寨币 交易对分类 1. 主流币（Blue Chips） 定义：市值前 10-20 的加密货币 代表币种： BTC/USDT（比特币）- 市值第一 ETH/USDT（以太坊）- 市值第二 BNB/USDT（币安币）- 交易所代币 XRP/USDT（瑞波币） SOL/USDT（Solana） ADA/USDT（Cardano） 特点： ✅ 流动性好（成交量大） ✅ 波动相对稳定 ✅ 价差小（滑点低） ✅ 不易被操纵 ✅ 信息透明 ⚠️ 收益相对较低 风险评级：🟢 低风险 2. 中盘币（Mid-Caps） 定义：市值排名 20-100 代表币种：…
Eufy Security Indoor Cam S350 for $80 ($60 off): This indoor camera is a powerhouse, featuring pan/tilt, a dual-lens 4K system with 8x zoom, and onboard AI. Blink Mini 2 for $20 ($20 off): The tiny Blink Mini 2 is already budget-friendly, but at half price, it’s a genuine steal. Ring Indoor Cam for $25…
We’re excited to introduce SecureBit.chat, a next-generation peer-to-peer communication platform designed for maximum privacy and performance. Unlike traditional messengers, SecureBit.chat is serverless, using WebRTC to connect users directly with military-grade encryption. Here’s what makes it unique: Adaptive WebRTC Calls: Optimized audio/video quality based on network conditions. Advanced Cryptography: ECDH + DTLS + SAS, full ASN.1…
The best laptop deal of this big week of deals can’t be found on Amazon. Not on Best Buy or Walmart either. Instead, at Dell.com, you’ll find the Dell 14 Plus (6/10, WIRED Reviewed) selling for just $650. For a Windows device, that price thoroughly categorizes it as a “budget laptop,” but the specs are…
I. The Strategic Imperative: Architectural Debt and Regulatory Constraints When engineering teams discuss infrastructure migration, the conversation often starts and often terminates with cost reduction. However, a significant architectural decision requires a synthesis of financial prudence, regulatory adherence, and operational excellence. The transition of our Kubernetes staging environment from DigitalOcean to Hetzner was not merely…
It’s Prime Day times, and one of my favorite sonic surprises of 2025 is getting a sweet discount. The Sony Bravia Theater System 6 is one of the best soundbar setups I’ve tested this year, offering a unique mix of components that serve up some of the most thrilling and musical surround sound you can…
