Hacker News: vishal_ch

New comment by vishal_ch in "Show HN: My Private GitHub on Postgres"

vishal_ch — Fri, 01 May 2026 17:51:58 +0000

Interesting approach using Postgres as the storage layer. Curious how you're handling the object model since Git's content-addressable storage maps pretty differently to relational tables. Are you storing blobs as bytea or going with something like a JSONB tree structure for the commit graph?

New comment by vishal_ch in "Show HN: I made a calculator that works over disjoint sets of intervals"

vishal_ch — Sun, 19 Apr 2026 10:54:14 +0000

The division example is a perfect illustration of why this matters — [-∞, +∞] as an answer is technically correct but operationally useless. The union representation actually preserves information that standard interval arithmetic throws away. Curious about the composition behavior: if you chain multiple operations that each produce disjoint unions, does the number of intervals in the result grow exponentially in the worst case? And how does the implementation handle that — is there a merging/simplification step, or do you let it grow? The tan() implementation must have been painful given the infinite number of discontinuities.

New comment by vishal_ch in "Show HN: MDV – a Markdown superset for docs, dashboards, and slides with data"

vishal_ch — Sun, 19 Apr 2026 10:53:21 +0000

The table syntax extension in the top comment is interesting — it solves the readability problem without breaking unrendered markdown. The ::y1 approach degrades gracefully. One thing I keep running into with these markdown supersets: the rendering gap. You write locally, push somewhere, and suddenly the :::columns block is just raw text. Marp handles this well because the VSCode plugin closes that loop immediately. Curious how MDV handles the renderer portability problem — is the spec open enough that editors could pick it up, or does it depend on the MDV CLI being in the chain?