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Canceling Fetch Requests in JavaScript with AbortController

The AbortController in JavaScript allows for canceling fetch requests by creating an AbortController with a signal passed into the fetch call.
The signal object, built on top of EventTarget, holds its state internally and dispatches an 'abort' event when controller.abort() is called.
Using AbortController and signal, you can cancel fetch requests effectively, with the fetch promise getting rejected on abort and a 'AbortError' DOMException thrown.
Creating new controllers for retry logic ensures a clean state for each request and simplifies cancel behavior in your code.
Implementing canceling on demand allows for efficiently managing fetch requests, preventing wasted network activity and displaying stale data.
In frontend frameworks like React or Vue, canceling fetches on unmount helps prevent errors and ensures UI consistency.
Using setTimeout with AbortController provides a way to set timeouts for fetch requests and handle fallback behaviors.
AbortController can be used beyond fetch, enabling the cancelation of timers, loops, and other long-running logic by checking the signal.
By utilizing AbortController and signals, you can make asynchronous processes more responsive to changes in your application, improving overall user experience.
The mechanics of AbortController revolve around creating controllers with signals to stop processes immediately, making it a simple and effective tool for managing asynchronous operations.

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Dev

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Apple Ordered to Allow Crypto Payments & NFT Links in iOS Apps After Court Ruling

Apple has been ordered to allow external payment options, including crypto payments and NFT links, on iOS apps after a court ruling.
Developers can now link to external NFT marketplaces and crypto wallets, and Apple cannot charge a 30% fee for off-app purchases.
Apple updated its App Store guidelines post the ruling to allow apps to direct users to crypto-based payment platforms and external links to NFT collections.
The ruling is seen as a significant opportunity for developers in the crypto and NFT ecosystem, opening up possibilities for mobile-first NFT platforms, P2E games, crypto wallets, Web3 marketplaces, and more.

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Medium

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Not a Coding Contest Genius? You Can Still Make It in Tech

Competitive programming skills are not mandatory for having a successful career in tech.
There are various high-paying and impactful tech roles where solving complex algorithmic problems is not a prerequisite.
You can excel in tech by focusing on building real projects, developing practical skills, and gaining experience through internships or freelance opportunities.
Tech careers offer diverse paths, including product development, automation, team management, interface design, and AI applications, so you can choose a direction that aligns with your interests and strengths.

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Hackernoon

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Flipster Launches APR Supercharge With Up To 122% Yield On USDT—Setting a New Competitive Benchmark

Flipster launches APR Supercharge, offering up to 122% yield on USDT deposits from June 1 to June 14, 2025.
Users can earn a base APR of 20% on new net deposits, with the potential to unlock an additional 80% APR boost by maintaining a daily trading volume and depositing via specific networks.
Rewards are stackable with Flipster's existing Earn Campaign, allowing users to potentially earn a combined APR of up to 122%, distributed daily in USDT.
The campaign aims to provide a user-first trading experience, offering zero-fee trading, up to 100x leverage, and opportunities to trade across 350+ cryptocurrencies.

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Javacodegeeks

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Introduction to Apache Kylin

Apache Kylin is an open-source distributed analytics engine that offers fast OLAP queries on large-scale datasets stored in systems like Apache Hive or HDFS.
Key features of Apache Kylin include pre-computed cubes, standard SQL support, massive scalability, multi-engine compatibility, security integration, and RESTful APIs.
Apache Kylin precomputes OLAP cubes offline, stores them for fast retrieval, and integrates with BI tools like Tableau and Power BI.
Its architecture includes components like Web UI, Metadata Store, Query Engine, Cube Engine, Storage Layer, and REST Server.
Installation using Docker simplifies local setup, enabling users to quickly create projects, data models, and OLAP cubes in the Kylin Web UI.
Querying Apache Kylin can be done through its Web UI, BI tools via drivers, or REST API for data automation, facilitating fast analytical insights.
Apache Kylin is suitable for enterprise BI dashboards, marketing analytics, sales reporting, customer behavior analysis, and telecom data analysis.
By precomputing cubes, Kylin boosts query speed, making it ideal for interactive dashboards and real-time analytics on big data platforms.
With its fast analytics capabilities, Apache Kylin serves as a valuable tool for businesses looking to bridge the gap between massive datasets and BI needs.
Overall, Apache Kylin offers a compelling option for enhancing analytical workloads and enabling real-time business intelligence on big data architectures.

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Livescience

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Golden Dome: Everything to know about Trump's $25 billion missile defense plan

President Trump announced a $25 billion missile defense system, named Golden Dome, to protect the U.S. from various missile threats.
The initiative aims to provide close to 100% protection within the next three years, costing a projected $175 billion.
Multiple countries developing advanced missiles pose a challenge to current U.S. missile defense systems.
Golden Dome would require a global array of sensors and interceptors to detect and track missile threats.
Intercepting hypersonic missiles involves detecting, tracking, and destroying the threats using advanced sensor and defense systems.
Achieving near 100% protection is unlikely, with deterrence being a more crucial goal against expensive missile threats.
The three-year timeframe for Golden Dome's deployment is ambitious due to the complexity of integrating new defense technologies.
President Trump's funding request for Golden Dome represents 2.5% of the total defense budget, making it financially achievable.
Golden Dome, compared to Iron Dome, will cover a wider region and employ directed energy weapons for missile defense, like high-energy lasers.
The plan for Golden Dome will involve a layered defense approach against ballistic, cruise, and hypersonic missiles, with potential future advancements in technology.

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Scand

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Top Rust Development Companies You Should Know

Rust, ranked as the 14th most-used programming language globally in 2024, has gained popularity due to its ability to address common coding issues like crashes, memory problems, and security vulnerabilities.
The language is favored by tech giants such as Amazon, Microsoft, and Dropbox, and is highly regarded by developers for its speed and safety, finding applications in diverse sectors such as blockchain, finance, web development, IoT, game development, and AI/ML.
Rust stands out for its ability to detect flaws before execution, handle concurrency effectively, integrate with other languages seamlessly, and deliver high performance and security.
When hiring a Rust development company, factors like past projects, communication, post-project support, and team size play crucial roles in ensuring successful project outcomes.
In 2025, the top Rust development companies include SCAND, SoluLab, Yalantis, Serokell, Sigma Software Group, Peiko, Roonyx, Keenethics, Out Of The Box Systems, and Softstack, each offering expertise in various domains like blockchain, IoT, AI, and more.
These firms excel in delivering secure, high-performance Rust solutions tailored to specific industry needs while ensuring timely delivery and innovative approaches.
Rust, compared to languages like C++, Python, and Go, provides a balance of speed, safety, and control, making it a preferred choice for projects requiring high performance and security.
Rust is particularly well-suited for blockchain development due to its memory safety and speed, and can be used for web and mobile development, especially in creating WebAssembly-based web applications.
While Rust developers may come at a higher cost due to the language's complexity and demand, the return on investment is often favorable for performance-critical applications.
Overall, Rust's rise in popularity and its unique features make it a compelling choice for companies looking to develop robust, secure, and high-performance software solutions.

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Medium

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Build with WakeUp Labs on Optimism: OP as Venture Studio

Funded by Optimism Collective and executed by WakeUp Labs to support projects within the Optimism ecosystem.
WakeUp Labs aims to remove barriers and boost adoption in DeFi, gaming, and infrastructure on Optimism.
The project consists of five milestones that can overlap, ensuring smooth progression.
Key performance indicators will evaluate the success of projects supported by the program.

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Dev

253

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Beyond the Listing: How Exchanges Support Tokens Post-Launch

Listing a token on a centralized exchange (CEX) is just the beginning of a more strategic phase in the cryptocurrency industry.
Leading exchanges like OKX, Gate.io, MEXC, Bybit, and WhiteBIT provide post-listing support and project enablement from a product and developer's standpoint.
Exchanges have different listing requirements, onboarding processes, and regional influencer strategies, with varying approaches to support tokens post-launch.
Understanding these mechanisms is crucial for token teams to drive adoption, maintain engagement, and support healthy trading activity after listing.

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Dev

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What I Learned About Post-Listing Support from Major Exchanges

Getting listed on an exchange is just the beginning as post-listing support plays a crucial role in a token's lifecycle.
Major exchanges like Gate.io, OKX, MEXC, Bybit, and WhiteBIT provide different levels of post-listing support.
Gate.io focuses on visibility and light-touch support, OKX on co-marketing and partnerships, MEXC on narrative building, WhiteBIT on full ecosystem support, and Bybit on structured campaigns.
Choosing the right exchange for post-listing support, considering regional KOL partnerships, can significantly impact a token's success in the crypto landscape.

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Dev

233

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Why Crypto Integration Is No Longer Optional for Traditional Banks

The collaboration between traditional banks and crypto exchanges has shifted from theoretical to practical in recent years.
Integration with crypto platforms has become a strategic move for banks looking to stay competitive in the digital financial landscape.
Notable partnerships between traditional financial institutions and crypto platforms are emerging globally, showcasing the trend of collaboration.
Crypto integration for banks includes secure custody, embedded trading, fiat on/off ramps, and tokenization of assets, offering new revenue streams and positioning as technology leaders.

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Sdtimes

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How to upskill software engineering teams in the age of AI

40% of software engineering managers expect AI to drastically change the skills needed for successful software engineering within three years.
Adoption of AI tools like AI code assistants is transforming how organizations develop technical talent.
The skills-experience paradox hinders junior engineers who work with AI tools that may bypass key concepts they need to master.
Structured learning pathways combining fundamental skills with AI tool integration are crucial for software engineering leaders.
Formal learning, social learning through communities, and on-the-job learning are key approaches to upskilling software engineering teams.
Shift focus from productivity metrics to learning outcomes for effective use of AI tools in software engineering.
Emphasize AI tools as learning aids to accelerate learning and deepen understanding of software engineering principles.
AI proficiency divide exists between developers who leverage AI tools effectively and those who struggle to integrate them.
Evolve skills assessment to evaluate both fundamental technical competencies and higher-level thinking skills.
Continuous learning frameworks connecting technical assessments to personalized development paths are crucial for talent development.

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Medium

⚡ “Scripting for DevOps Engineers: Tools, Levels & Roadmap to Success”

Scripting is crucial for automation in DevOps, enabling tasks automation, cloud infrastructure management, and CI/CD workflow optimization.
Key scripting languages for DevOps engineers include Shell Scripting (Bash & PowerShell) for basic tasks automation, and languages like Python, Go, Terraform, and Ansible for advanced automation and cloud provisioning.
DevOps engineers should focus on learning fundamental scripting with Bash and Python, progressing to managing Kubernetes clusters, optimizing CI/CD workflows, and building scalable systems in cloud-native architectures.
For Azure DevOps, essentials include PowerShell, Bash, YAML, Python, Go, Terraform, Docker, Kubernetes, and Git for automation, pipeline configurations, managing Kubernetes, and version control in CI/CD.

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Medium

156

Data Migration in a Product-Based Environment Using Java & Python in Azure DevOps

ETL-Based Migration involves Extract, Transform, Load using Apache Kafka, Spark, or custom Java/Python scripts.
Database Replication & Sync can be achieved for PostgreSQL, MySQL, Azure SQL using Flyway, Liquibase, or Python ORM.
Data Pipeline Automation can be done through Azure Data Factory or Python-based ETL jobs integrated with Azure DevOps.
Cloud Storage Transfer includes moving blobs and structured datasets via Azure Storage SDK using Java/Python.

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Medium

350

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Building Offline-First Mobile Apps: When Internet isn’t Guaranteed

Cogntix focuses on building offline-first mobile apps to ensure seamless user experience regardless of internet connectivity.
Local data storage with smart syncing is implemented to prevent data loss and allow users to continue tasks without network dependency.
Caching mechanisms are utilized to improve app performance, reduce load times, and enhance efficiency, particularly in low-connectivity areas.
Background task systems are in place to handle offline actions, ensuring tasks are remembered, retried, and completed once connectivity is restored for uninterrupted workflows.

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