Firefighter builds offline iPhone predator caller app using ChatGPT and Codex

A firefighter and hunter with no formal app-development experience used AI tools ChatGPT and Codex to build an iPhone app called PREDATOR. The app is designed to play predator calls offline through a Bluetooth speaker, eliminating the ad interruptions common in existing alternatives. The developer shaped product decisions around real hunting scenarios rather than ad-supported models. The app is currently moving toward field testing with coyote hunters to identify issues before a wider release. The project highlights how AI-assisted development is enabling non-programmers to independently build and ship functional mobile applications.

San Francisco Onion Futures Company

Article URL: https://onionfutures.com/ Comments URL: https://news.ycombinator.com/item?id=49763296 Points: 12 # Comments: 3

Trump Extends H-1B Visa Restrictions and $100,000 Fee Proposal by One Year

The Trump administration has extended its restrictions on the H-1B visa programme by another year, along with a proposed $100,000 fee for employers seeking to hire skilled foreign workers. The H-1B visa allows US companies to recruit tech professionals and other skilled workers from abroad for temporary employment periods. The extension signals the administration's continued scrutiny of foreign worker programmes. The move is expected to impact industries, particularly the technology sector, that rely heavily on international talent through this visa route.

Nithari Case Acquittee Surinder Koli Found Dead in Haridwar After Living Under Alias

Surinder Koli, acquitted in the infamous Nithari serial killings case, was found hanging in Haridwar. After his release from prison, Koli had assumed the alias 'Sada Ram' to hide his past and had recently started a small tea stall. Police are treating the death as a suspected suicide, though a local social activist has raised concerns about possible foul play and harassment. His family has not been able to establish a clear reason behind his death.

Saudi Arabia issues first Riyadh air raid alerts amid Houthi attack escalation

Saudi Arabia issued air raid alerts for its capital Riyadh, marking the first such warnings since Houthi forces escalated their attacks on the kingdom. Residents in the city reported hearing explosions during the alert period. Authorities subsequently issued an all-clear signal, indicating the immediate threat had passed. The incident reflects the ongoing tensions between Saudi Arabia and Yemen's Houthi movement, which has intensified its offensive operations in recent times.

Data Replication Explained: Single-Leader, Multi-Leader, and Leaderless Strategies

Data replication creates a live, continuously updated copy of a database, unlike backups which capture only a point-in-time snapshot. Replication serves key purposes including high availability, read scaling, and reducing latency through geographical distribution of data. The most common approach is Single-Leader Replication, where one node handles all writes and followers sync from it, balancing simplicity with read scalability. Multi-Leader Replication allows multiple nodes to accept writes, but introduces complex data conflicts that must be resolved through strategies like Last Write Wins or CRDTs. Leaderless Replication, popularized by Amazon's 2007 Dynamo paper and used in systems like Apache Cassandra, allows writes to any node but comes with its own consistency trade-offs.

Oil is high, but Xi may have spared Trump more

Trump on China’s press: ‘We’re repressive also’

Russia votes in occupied Ukraine; Kyiv says illegal

Suicide car bomb at Pakistan police compound kills 31, wounds 80

A suicide car bombing struck a police compound in Pakistan on Friday, killing at least 31 people and injuring around 80 others. The attacker drove an explosives-laden vehicle into the facility while officers and their families were gathered at a mosque inside for prayers. Most of the casualties were police personnel, though the full extent of civilian losses was not immediately clear. Several of the wounded were reported to be in critical condition, with authorities warning the death toll could rise further.

Developer Shares Approach to Solving CS50P Problem Set 0's Making Faces

A developer has published a blog post on DEV Community detailing their approach to solving 'Making Faces', the third problem in CS50P's Problem Set 0. The post is part of an ongoing series called 'Cracking CS50P: A DevAdvocate's Python Guide', aimed at helping learners think through Python problems. The author focuses on guiding readers through problem-solving strategies rather than providing direct answers. A key takeaway from the post is a reminder that Python's string replace method works only on strings, not on numbers or floats. The author also references their previous article on the 'Playback Speed' problem and directs readers to a companion YouTube channel for further learning.

PixelCrew

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Rahul, Priyanka Slam Delhi Police Over Teen Girl's Gangrape and Murder

Congress leaders Rahul Gandhi and Priyanka Gandhi Vadra have spoken out strongly following the gangrape and murder of a teenage girl in Delhi. The siblings described the capital as a dangerous place for women and demanded accountability from authorities. Their criticism was directed at both the Delhi Police and Union Home Minister Amit Shah, whom they accused of negligence. They also condemned the broader pattern of sexual violence against minors in recent times.

Delhi exec Yuvraj Manchanda murdered by ex-colleagues, two arrested

Yuvraj Singh Manchanda, a Delhi-based executive, was allegedly murdered by his former colleagues Anya Vats and Sanyam Sachdeva, both of whom have been arrested. Investigators are probing a financial dispute estimated between Rs 5 lakh and Rs 25 lakh as a possible motive behind the killing. The case has drawn attention due to the complex and contradictory accounts surrounding how and when the body was disposed of. Authorities are working to piece together the sequence of events, which reportedly involved the body being kept, dumped, drowned, and later cremated.

CS50P Playback Speed Problem Teaches Python String Methods for Beginners

A developer advocate is documenting their journey through Harvard's CS50P Python course in an ongoing blog series. The second article covers the 'Playback Speed' problem from Problem Set 0, focusing on Python string manipulation methods. Key methods discussed include .lower(), .upper(), .title(), and .strip(), each serving a distinct role in formatting user input. The author also shares a personal mistake made while solving the problem, highlighting a common misunderstanding about the expected output format. The series aims to help beginners learn Python by walking through real CS50P problem-solving experiences step by step.

Study Finds GPT Models Transform Rather Than Eliminate Gender Bias

A new research paper published on arXiv examines how large language models like GPT handle gender discrimination. The study introduces the concept of 'harm laundering,' suggesting these models repackage biased outputs in less obvious ways rather than removing the underlying bias. Researchers argue that safety measures in GPT models may give a false sense of neutrality while discriminatory patterns persist in transformed forms. The findings raise concerns about the effectiveness of current AI alignment and content moderation approaches in addressing systemic gender bias.

CS50P Beginner Shares Lesson Learned From 'Indoor Voice' Problem Set

A developer-advocate aspirant enrolled in Harvard's CS50P (Python) course recently documented their experience solving the first problem in Problem Set 0, titled 'Indoor Voice.' The task required converting any user input to lowercase using Python's built-in .lower() string method, regardless of how it was typed. The author admitted to initially misreading the instructions and submitting incorrect code before catching the error. In the writeup, they also introduced related Python string methods — .strip(), .upper(), and .title() — to help beginners understand basic input handling. The post is aimed at newcomers to Python who may encounter similar pitfalls in early CS50 exercises.

Why AI Projects Need a Behavior Contract Before Any Code Is Written

Software engineer Derek Wang argues that AI-driven projects require a foundational 'constitution' — a strategy charter that defines the system's identity, boundaries, and human-AI collaboration rules before any work begins. Unlike code conventions, which govern the artifact, this behavior contract shapes how the AI checks, verifies, and handles mistakes. Wang outlines ten model-agnostic rules for his own projects, covering principles such as reading before writing, making minimal edits, and replacing tools after repeated failures. He warns that without such a charter loaded upfront, an AI model is effectively improvising without guardrails, and no downstream prompting can compensate. The approach treats the constitution not as documentation but as a binding contract every participant — human or AI — must internalize at the start.

NASA APOD Highlights Zodiacal Light in September 2026 Featured Image

NASA's Astronomy Picture of the Day (APOD) featured an image related to zodiacal light on September 19, 2026. APOD is a long-running NASA program that showcases a different astronomical image or photograph each day. Each featured image is accompanied by an explanation written by a professional astronomer. The September 19 entry, titled 'A Zodiacal Night,' focused on night sky observation and included an annotation of the phenomenon. Zodiacal light is a faint glow caused by sunlight reflecting off interplanetary dust particles in the solar system.

Koi Editor Uses Handwritten Lexers for Faster Syntax Highlighting and Folding

Koi Editor takes a direct approach to syntax highlighting by using small, language-specific handwritten lexers instead of declarative grammar systems or syntax trees used by editors like Sublime Text and Zed. Each lexer is purpose-built code that decides how text should be styled and folded without a generic engine in between. This design also enables syntax-aware folding, allowing code blocks to remain foldable even when indentation alone cannot determine structure. In performance benchmarks, Koi was able to apply syntax highlighting to files with millions of lines, while Sublime Text and Zed reportedly became unusable at much smaller scales. The developer attributes this efficiency to the lexers doing minimal work per token, tracking only token type, carry-forward state, and fold level.