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Ask HN: What did you learn last month? (July 2026)
12 points by bhu1st 17 hours ago | 7 comments

What did you learn recently? What concept finally "clicked" for you?

ChiperSoft 12 hours ago | parent | next [-]

While reading the Jelly-UI source I learned that you can use slot tags to effectively punch holes in the shadowdom on a web component. The elements passed in as component children can be assigned to a slot[1] within the component's shadowdom, and the external styles on them continue untouched.

1. https://github.com/jelly-org/ui/blob/main/src/components/res...

al_borland 16 hours ago | parent | prev | next [-]

I used Python webview to make some little desktop utilities.

Most modern frameworks feel like they have so much bloat and overhead. I wanted to make some simple things is a simple way, and it seemed like a good solution for that.

maerF0x0 16 hours ago | parent | prev | next [-]

I've been working on the course https://www.coursera.org/specializations/machine-learning-in... . No news to anyone on here, but new to me.

alok-g 16 hours ago | parent | prev | next [-]

Quantum Mechanics (ongoing), Sturm-Lioville theory, Special Relativity (ongoing), Tensors (going towards General Relativity)

What finally clicked: Hermitian matrix, self-adjoint operators, quantum operators for energy and momentum, the Metric (for modeling spacetime curvature), etc.

bawis 6 hours ago | parent [-]

What's the story of the Hermitian matrix and self adjoint operators?

WheelsAtLarge 17 hours ago | parent | prev | next [-]

Current AI can hack servers better than most hackers.

PrinceNaroliya 13 hours ago | parent | prev [-]

I have been learning langchain or langgraph for making good Agentic AI workflows.