This story was originally published on HackerNoon at: https://hackernoon.com/55-blog-posts-to-learn-about-data-structures-and-algorithms.
Learn everything you need to know about Data Structures And Algorithms via these 55 free HackerNoon blog posts.
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This story was written by: @learn. Learn more about this writer by checking @learn's about page, and for more stories, please visit hackernoon.com.

This story was originally published on HackerNoon at: https://hackernoon.com/how-to-build-a-reactive-spa-by-using-php-twig-and-javascript-via-stimulus-part-two.
Symfony Reactive SPA without writing a single line of React or Vue. Mercure Hub. Turbo Streams.
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This story was written by: @mattleads. Learn more about this writer by checking @mattleads's about page, and for more stories, please visit hackernoon.com.

If we were using React, this is where we would typically reach for a heavy library like react-beautiful-dnd, set up a complex Redux store or context provider to manage the optimistic state, and write custom WebSocket connection logic to handle real-time events.

This story was originally published on HackerNoon at: https://hackernoon.com/build-a-tiny-grep-clone-while-rust-teaches-you-who-owns-what.
In this post, we are going to learn about the problem Rust is solving, Rust's ownership, borrowing concept and build a mini grep clone in Rust.
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This story was written by: @sheerluck. Learn more about this writer by checking @sheerluck's about page, and for more stories, please visit hackernoon.com.

In this post, we are going to learn about the problem Rust is solving, Rust's ownership, borrowing concept and build a mini grep clone in Rust.

This story was originally published on HackerNoon at: https://hackernoon.com/deterministic-routing-the-hidden-key-to-low-latency.
Aligning your routing layer with your data topology can slash tail latency, boost throughput, and save real money.
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This story was written by: @ritvikpandya. Learn more about this writer by checking @ritvikpandya's about page, and for more stories, please visit hackernoon.com.

Random routing scatters requests, kills cache locality, and inflates tail latency in high-throughput systems. We fixed it using a clean two-layer deterministic routing strategy: Layer 1 (Ingress): Istio consistentHash on primary key → same entity always lands on the same app pod Layer 2 (App → DB): CockroachDB client handles leaseholder routing with zone configs and follower reads Production results (>1600 TPS): • 29% P95 latency reduction • 2.1× throughput on same infrastructure • 42% faster failover recovery • $1.2M annualized cost savings Core insight: Many latency problems aren’t tuning issues — they’re routing problems. Align routing with data locality and keep the layers separate.

This story was originally published on HackerNoon at: https://hackernoon.com/the-classic-computer-vision-trick-behind-smooth-image-blending.
Learn how to create seamless image collages using Laplacian Pyramid Blending with this Python tutorial.
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This story was written by: @farzon. Learn more about this writer by checking @farzon's about page, and for more stories, please visit hackernoon.com.

This post explains Laplacian Pyramid Blending, a classic computer vision technique that blends images by separating fine details from broad color strokes. By using Gaussian Pyramids to blur and Laplacian Pyramids to isolate edges, you can create buttery-smooth transitions.

This story was originally published on HackerNoon at: https://hackernoon.com/7-essential-ip-geolocation-api-features-every-developer-needs.
Learn the 7 essential features of production-ready IP geolocation APIs, from accuracy and ASN data to privacy detection and real-time performance.
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Modern IP geolocation APIs are critical infrastructure, powering fraud prevention, personalization, and routing decisions. The best solutions go beyond location data, offering high accuracy, real-time updates, ASN intelligence, privacy detection, and confidence scoring. Performance, scalability, and developer experience ensure reliable integration, making geolocation a trusted signal across applications.

This story was originally published on HackerNoon at: https://hackernoon.com/what-if-the-next-killer-device-isnt-a-phone-but-a-memory-upgrade.
Modern technology breaks short-term memory. A new class of AI wearables could help people preserve thoughts before they disappear.
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This story was written by: @lexi9omega. Learn more about this writer by checking @lexi9omega's about page, and for more stories, please visit hackernoon.com.

Modern technology breaks short-term memory. A new class of AI wearables could help people preserve thoughts before they disappear.

This story was originally published on HackerNoon at: https://hackernoon.com/how-asyncsequence-makes-swift-ai-apps-feel-instant.
Learn how AsyncSequence helps Swift 6 developers build real-time AI chat interfaces with safe, smooth token streaming in SwiftUI.
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This story was written by: @programmingcentral. Learn more about this writer by checking @programmingcentral's about page, and for more stories, please visit hackernoon.com.

Learn how AsyncSequence helps Swift 6 developers build real-time AI chat interfaces with safe, smooth token streaming in SwiftUI.