Developer guide explains how to build an IATA-compliant boarding pass barcode in JavaScript

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A detailed technical tutorial published on DEV Community walks developers through generating a valid IATA Bar Coded Boarding Pass (BCBP) payload using JavaScript, following the strict field layout defined by IATA Resolution 792. The guide covers encoding mandatory and conditional sections with precise character widths, correct padding rules, and nested hexadecimal size fields required for scanner compatibility. It also demonstrates signing the security section using the WebCrypto API so that any altered field can be detected later. The generator supports rendering the payload as four barcode symbologies — PDF417, Aztec Code, QR Code, and Data Matrix — entirely in the browser using the bwip-js library with no build step required. The project includes a self-checking parser that reads back the page's own output to verify conformance.

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Publora Lists on Claude Connector Directory After Month-Long Build and Portal Glitches

The team behind Publora successfully submitted their product to Anthropic's official Claude connectors directory, with the submission form itself taking only about fifteen minutes to complete. However, the process was preceded by roughly six weeks of preparation, including reviewing thirteen pages of documentation, testing the server against fifteen requirements, and manually running eighteen tools in production. After hitting publish, the portal immediately showed a 'live' status, but the public listing page returned a 'connector does not exist' error for several hours before resolving on its own. The team also encountered several other discrepancies, including the portal incorrectly flagging the server as requiring no authentication, four mismatches between the official documentation and the actual submission form, and all eighteen tools being flagged as missing titles despite having them. The author shared these issues publicly to help other developers avoid the same time-consuming pitfalls when submitting their own connectors.

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ProgrammingDEV Community ·

Polars 2.0 parses 1M dates 25x faster than lru_cache in Mac mini benchmark

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ProgrammingDEV Community ·

hi3d-cli Lets Developers Generate 3D Models From Terminal Using AI API

A new open-source command-line tool called hi3d-cli enables developers to generate textured 3D models directly from the terminal without manual downloads from web dashboards. The zero-dependency tool connects to the Hi3D API and supports multiple output formats including GLB, OBJ, STL, FBX, and USDZ, covering use cases from web apps to 3D printing. Setup takes under a minute via npx, with an interactive wizard storing API credentials locally. The tool also integrates with Claude Code as an agent skill, allowing automated 3D asset generation within existing development workflows. The package is available on both GitHub and NPM under the handle hi3d-cli.

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ProgrammingDEV Community ·

How Free-List, Slab, and Buddy Allocators Solve Memory Management Challenges

A developer tutorial series exploring OS memory allocation explains how page-based memory management introduces new challenges around efficiency and overhead. Modern 64-bit CPUs read data in 8-byte chunks, making memory alignment critical for performance, though page-aligned memory from the OS helps address this. A key problem arises with small allocations, where metadata overhead can exceed 600% of the actual memory requested. The Linux kernel addresses this with Slab Allocators, which use a single control structure to manage hundreds of fixed-size slots. The article introduces three main allocator strategies — Slab, Buddy, and Free-List — each suited to different use cases, and demonstrates a basic Free-List implementation using linked lists and pointer arithmetic in C.

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