Hacker News: loa_observer

New comment by loa_observer in "Show HN: Put Greenland on the Moon (interactive map for size compare)"

loa_observer — Thu, 08 Jan 2026 02:00:24 +0000

there is a counrty list settings in the right panel, which you can select any country and add it to map

Show HN: Put Greenland on the Moon (interactive map for size compare)

loa_observer — Wed, 07 Jan 2026 13:06:01 +0000

Just built a small tool and created some comparsion of country size vs. planets. Greenland seems larger than i thought.

The tool allows you to drag a counry to other planet to see the size there.

Comments URL: https://news.ycombinator.com/item?id=46525962

Points: 6

# Comments: 2

New comment by loa_observer in "Show HN: Interactive Map you can drag a country to Mars/Moon/Jupiter"

loa_observer — Mon, 05 Jan 2026 16:28:17 +0000

thanks for the ux feedback, will ship a better version soon. by the way, there is a fullscreen model which the drag-and-drop experience might feel better

Show HN: Interactive Map you can drag a country to Mars/Moon/Jupiter

loa_observer — Mon, 05 Jan 2026 15:22:45 +0000

I made a drag-and-drop playground: pick a country, drop it onto Mars/Moon/Jupiter, and see how large it looks there.

Demo: https://www.runcell.dev/tool/true-size-map

Open source: https://github.com/ObservedObserver/world-map-reality;

happy to take feedback / PRs.

Comments URL: https://news.ycombinator.com/item?id=46499812

Points: 2

# Comments: 2

Show HN: Git-aware File tree viewer for Jupyter [video]

loa_observer — Tue, 30 Dec 2025 20:05:12 +0000

Hi, I just build a morden git aware file tree viewer plugin for jupyter, it can display files in tree view with status color(gray for gitignored, yellow for modified, etc)

And also a global search and replace feature in it.

looking forward to jupyter users' feedback

Comments URL: https://news.ycombinator.com/item?id=46437380

Points: 1

# Comments: 0

New comment by loa_observer in "Show HN: Drag-and-drop playground to compare the true sizes of countries"

loa_observer — Tue, 23 Dec 2025 01:01:56 +0000

just updated a new version to seperate them, you can have a try :)

Show HN: Drag-and-drop playground to compare the true sizes of countries

loa_observer — Tue, 23 Dec 2025 00:26:01 +0000

I built a drag-and-drop map playground to compare the true sizes of countries and visualize Mercator distortion, just for fun and sharing. Open source + easy to replace the GeoJSON with your own data.

Demo: https://www.runcell.dev/tool/true-size-map

Source: https://github.com/ObservedObserver/world-map-reality

Comments URL: https://news.ycombinator.com/item?id=46360949

Points: 2

# Comments: 2

New comment by loa_observer in "Show HN: Picknplace.js, an alternative to drag-and-drop"

loa_observer — Tue, 16 Dec 2025 20:07:35 +0000

how does it work with more complex layout not just vertical list of items, like those drag-and-drop for visualization UI: https://github.com/Kanaries/graphic-walker

you can see that there are different areas of draggable and droppable, on different directions.

New comment by loa_observer in "SQLite JSON at full index speed using generated columns"

loa_observer — Fri, 12 Dec 2025 19:03:32 +0000

duckdb is super fast for analytic tasks, especially when u use it with visual eda tool like pygwalker. it allows u handles millions of data visuals and eda in seconds.

but i would say, comparing duckdb and sqlite is a little bit unfair, i would still use sqlite to build system in most of cases, but duckdb only for analytic. you can hardly make a smooth deployment if you apps contains duckdb on a lot of platform

New comment by loa_observer in "GPT-5.2"

loa_observer — Fri, 12 Dec 2025 18:58:54 +0000

does the model really improve? i tried several tasks today, and most of them failed, which are super easy ones.

maybe it's just because the gpt5.2 in cursor is super stupid?

Code agents does not handles Jupyter well, so I build a special AI agent for it

loa_observer — Wed, 10 Dec 2025 20:03:40 +0000

Article URL: https://www.youtube.com/watch?v=DNDVSAUAMsc

Comments URL: https://news.ycombinator.com/item?id=46222954

Points: 2

# Comments: 0

New comment by loa_observer in "Show HN: Wealthfolio 2.0- Open source investment tracker. Now Mobile and Docker"

loa_observer — Mon, 24 Nov 2025 00:51:56 +0000

it would be great if it can integrate a graphic walker compoennt for those tablaur data visualzation on-flight

https://github.com/Kanaries/graphic-walker

Ask HN: How should new programmers learn in the AI era?

loa_observer — Mon, 27 Oct 2025 06:47:19 +0000

My younger brother just started learning programming. When I was learning, I spent weeks building small demos and exercises — calculators, todo apps, little games — but now, most of those can be built in seconds with AI assistants.

I’m wondering: should new programmers still learn the same way we did — building everything by hand — or are there better ways to learn with AI tools around?

Have you seen examples of new developers who learned effectively with AI assistance? How did they structure their learning or projects?

I’d love to hear what worked for you, your students, or junior colleagues today.

Comments URL: https://news.ycombinator.com/item?id=45718057

Points: 9

# Comments: 14

Tool for Archiving Twitter and Instagram Posts

loa_observer — Thu, 09 Oct 2025 09:14:33 +0000

Article URL: https://xarchive.net

Comments URL: https://news.ycombinator.com/item?id=45525299

Points: 2

# Comments: 0

Show HN: AI Agent in Jupyter – Runcell

loa_observer — Thu, 28 Aug 2025 09:13:51 +0000

I build runcell, an AI Agent in Jupyter Lab. It can understand context (data, charts, code, etc) in your jupyterlab and write code for you.

Runcell has built-in tools that can edit or execute cells, read/write files, search web, etc.

Comparing with AI IDE like cursor, runcell focus on building context for code agent in jupyter environment, which means the agent can understand different types of information in jupyter notebook, access kernel state, edit/execute specific cells instead of handling jupyter as static ipynb file.

Comparing with jupyter ai, runcell is more like an agent instead of a chatbot. It have access to lots of tools to work and take actions by its own.

You can use runcell with simple "pip install runcell" to start.

Any comments and suggestions are welcome.

Comments URL: https://news.ycombinator.com/item?id=45050070

Points: 8

# Comments: 1

Claude Code vs. Cursor

loa_observer — Wed, 06 Aug 2025 13:40:43 +0000

Article URL: https://open-data-analytics.medium.com/claude-code-vs-cursor-the-battle-of-ai-coding-agents-in-2025-fea04c4490eb

Comments URL: https://news.ycombinator.com/item?id=44811883

Points: 2

# Comments: 0

Show HN: Multi-session Claude Code manager with async workflow

loa_observer — Wed, 09 Jul 2025 07:30:12 +0000

Article URL: https://github.com/ObservedObserver/async-code

Comments URL: https://news.ycombinator.com/item?id=44507201

Points: 4

# Comments: 0

Show HN: GUI for Claude Code – parallel tasks supported

loa_observer — Mon, 23 Jun 2025 17:10:08 +0000

Use Claude Code / CodeX CLI to perform multiple tasks in parallel with a Codex-style UI.

A code agent task management system that provides parallel execution of AI-powered coding tasks. Users can run multiple Claude Code agents simultaneously through a Codex-style web interface, with support for different agents for comparison and evaluation.

Comments URL: https://news.ycombinator.com/item?id=44357841

Points: 2

# Comments: 0