A Cubit or Bloc Is Just a Container Holding a Signal: How Much BLoC vs. Signals Do You Actually Need?

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The False Dilemma of Modern Flutter State Management Every couple of years, the Flutter community finds itself trapped in a recurring debate. On one side, you have developers who grew up on the classic BLoC pattern. They value structure. They want events to represent user intent, they want state transitions to pass through an observable pipeline, and they want concurrency tools like debounce and restartable handlers to prevent double-taps and race conditions. But classic BLoC came with an architectural tax: everything was built on asynchronous Dart Stream pipes.

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Preserve plus signs and ampersands in demo search URLs

Build search parameters from raw values with URLSearchParams so a plus sign or ampersand in the user's input survives the round trip. A prototype may work with a single word and fail with a team name such as C++ & design. Concatenating that value into a query string gives punctuation another job: an ampersand can separate parameters, and a plus sign in form-style query syntax can be decoded as a space. Rehearse a value that contains both characters. Use a URL object for the full address, then set the unencoded input value on its searchParams.

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ProgrammingDEV Community ·

Running AWS Strands Decider 2B Locally: A Complete Setup Guide for AI Routing & Multi-RAG Systems

🚀 Running AWS Strands Decider 2B Locally for Multi-RAG and Agentic AI Applications As GenAI applications become more sophisticated, one challenge continues to surface: How do we make reliable decisions before invoking an LLM? For example: Which datasource should answer this question? Should I query PLM, Jira, or Confluence? Do I have enough context to answer confidently? Should an AI agent invoke a tool or ask a clarification question?

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ProgrammingDEV Community ·

Retry Storms: How a 502 Fix Created a Thousand Duplicate Orders

Retry Storms: How a 502 Fix Created a Thousand Duplicate Orders In modern distributed systems, transient failures are inevitable. Timeouts, circuit breakers, and retries are standard defense mechanisms. But when idempotency—the guarantee that processing the same request multiple times has the same effect as processing it once—is skipped, retries turn into a destructive force. This isn’t a theoretical scenario. It’s a real incident that unfolded in a production e-commerce system, where a single upstream timeout cascaded into thousands of duplicate orders.

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ProgrammingDEV Community ·

Topic 13: Shortest Path Algorithms 🚀

Now we move deeper into graphs. The key interview question is: Given a graph, how do I find the minimum-cost path from one node to another? The correct algorithm depends mainly on edge weights. Memorize this table: Graph Algorithm Unweighted graph BFS Weights are only 0 and 1 0-1 BFS Non-negative weights Dijkstra Negative weights possible Bellman-Ford All-pairs shortest paths Floyd-Warshall DAG Topological-order shortest path Unweighted → BFS Non-negative weighted → Dijkstra Negative edges → Bellman-Ford You already saw this with BFS. Example: 0 --- 1 --- 2 | 3 Every edge has equal cost.

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