Volkswagen Unveils EV Concept Claiming Nearly 900-Mile Range

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Volkswagen has revealed a new electric vehicle concept called the Mission Efficiency, which reportedly offers a range of nearly 900 miles on a single charge. The concept was announced and shared alongside official photos and specifications. The vehicle represents a significant leap in claimed EV range compared to current production electric cars. Further technical details are available via Motor1's coverage of the concept.

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Verifying an audit log involves three distinct checks that are often conflated

Checking an audit log can mean three separate things: whether an application accepts a signed bundle, whether its entries form a consistent chain, and whether an independent verifier can confirm the publisher's signature. A QA test of a gateway showed an earlier 12-entry signed copy was accepted, while a tampered two-entry copy was rejected at the first entry. An independent analysis confirmed the hash chain and digest were internally consistent, but could not verify the signature because the exact signing message format was not available. The author also notes that a later export returned an unvalidated tiny response, so the older file should not be called the final ledger. The piece recommends labeling each verification claim by what it does and does not establish, and publishing a versioned specification for serialization, signing, and export completeness.

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ProgrammingDEV Community ·

pdf.js render resolves silently on oversized pages, leaving a transparent canvas

A developer found that pdf.js render() can resolve successfully on a very large PDF page while the canvas it draws to is actually empty. Testing on desktop Chromium with pdfjs-dist 4.4.168 showed the failure begins once the canvas exceeds about 268 million pixels in area, with no thrown error or console message. Reading back pixels or calling toDataURL() revealed the blank output, since a canvas over the browser's limit still returns a valid context. The author suggests a post-render alpha check on a single pixel to catch the failure, while noting it only fits pages with a default white background. The tests covered only one blank vector page and one browser on one machine, so results may differ elsewhere.

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ProgrammingDEV Community ·

Why MDX Blogs Throw EvalError on Cloudflare Workers and How to Fix It

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ProgrammingDEV Community ·

Three Kubernetes NetworkPolicy Baseline Mistakes That Break Namespace Isolation

A default-deny NetworkPolicy changes how Kubernetes pods communicate by blocking traffic unless explicitly allowed. The article notes that policies are additive and allow-only, and that enforcement depends on the CNI plugin rather than the API object itself. A common failure occurs when a default-deny egress policy is applied without a DNS exception, causing pods to fail name resolution. Other pitfalls include DNS setups like NodeLocal DNSCache, which may need extra rules for hostNetwork pods or link-local addresses. The author also points to other platform dependencies that often break in the same way when they are not explicitly allowed.

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