Electric cars poised to overtake petrol sales in the UK, new data indicates

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New sales figures suggest battery-electric vehicles are close to outselling petrol cars in the United Kingdom. The data was highlighted in a report published by Electrek in early November 2026. The article attributes the shift to continued growth in EV registrations over recent months. The source material provided here is limited to the link and discussion metadata, so specific figures and quotes are not included in this summary.

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Five chmod Permission Traps That Catch Developers Out

Standard tutorials recommend chmod 755 and 644 without explaining the permissions they grant. On directories, the read, write and execute bits behave differently: read lists names, write creates or deletes entries, and execute allows traversal, so a directory set to 666 is readable but unusable. The author also highlights confusion around chmod's = and + operators, the capital X flag for applying execute only where appropriate, and how umask is applied. Misplaced digits can unintentionally set setuid or setgid bits, while redirected file creation can yield overly permissive modes such as 644 for SSH keys. The article recommends install -m 600 for sensitive files and suggests a chmod calculator for verifying modes.

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ProgrammingDEV Community ·

Loop order alone makes a 4096x4096 grid sum 13x slower due to CPU cache misses

A DEV Community author compared two functions that sum the same 4096 by 4096 grid, differing only in whether the outer loop walks rows or columns. Row-order summing took about 11 ms on an Apple M3 laptop, while column-order summing took about 146 ms, roughly 13 times slower. The explanation is that the CPU loads memory in fixed-size cache lines, so reading neighboring elements in a row reuses cached data, while jumping between rows in a column forces a memory fetch on nearly every read. The gap appears once the grid exceeds the cache size, and the author notes that a Float64Array shows the same pattern, indicating the cause is memory layout rather than JavaScript arrays. Suggested fixes include keeping the row loop outermost and accumulating column totals in a separate array, which matched the results of the column-order method at about 12 ms.

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ProgrammingDEV Community ·

A job offer on LinkedIn came with malware in a Git hook. It's the "Contagious Interview" playbook

A recruiter messaged me on LinkedIn about building the website for a blockchain basketball game. Then they sent a documentation pack as a .tar.gz file. The plan was simple: review the docs, sign the NDA, then we'd schedule a call. The docs were real enough to read. The archive also held a Git hook that would have downloaded a script and run it on my Mac the first time I checked out a branch.

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ProgrammingDEV Community ·

Apple's HALO Humanoid Hits 91% Task Success Using Qwen Model

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