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David M. Johnson dmjio

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@rxaviers
rxaviers / gist:7360908
Last active March 5, 2026 11:16
Complete list of github markdown emoji markup

People

:bowtie: :bowtie: 😄 :smile: 😆 :laughing:
😊 :blush: 😃 :smiley: ☺️ :relaxed:
😏 :smirk: 😍 :heart_eyes: 😘 :kissing_heart:
😚 :kissing_closed_eyes: 😳 :flushed: 😌 :relieved:
😆 :satisfied: 😁 :grin: 😉 :wink:
😜 :stuck_out_tongue_winking_eye: 😝 :stuck_out_tongue_closed_eyes: 😀 :grinning:
😗 :kissing: 😙 :kissing_smiling_eyes: 😛 :stuck_out_tongue:
@robertpainsi
robertpainsi / commit-message-guidelines.md
Last active March 4, 2026 11:36
Commit message guidelines

Commit Message Guidelines

Short (72 chars or less) summary

More detailed explanatory text. Wrap it to 72 characters. The blank
line separating the summary from the body is critical (unless you omit
the body entirely).

Write your commit message in the imperative: "Fix bug" and not "Fixed
bug" or "Fixes bug." This convention matches up with commit messages
@vasanthk
vasanthk / System Design.md
Last active March 3, 2026 17:40
System Design Cheatsheet

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

  1. Clarify and agree on the scope of the system
  • User cases (description of sequences of events that, taken together, lead to a system doing something useful)
    • Who is going to use it?
    • How are they going to use it?
@Kartones
Kartones / postgres-cheatsheet.md
Last active March 3, 2026 08:07
PostgreSQL command line cheatsheet

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

  • -E: will describe the underlaying queries of the \ commands (cool for learning!)
  • -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)
@tsiege
tsiege / The Technical Interview Cheat Sheet.md
Last active March 3, 2026 02:55
This is my technical interview cheat sheet. Feel free to fork it or do whatever you want with it. PLEASE let me know if there are any errors or if anything crucial is missing. I will add more links soon.

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






\

@bkaradzic
bkaradzic / orthodoxc++.md
Last active February 25, 2026 12:28
Orthodox C++

Orthodox C++

This article has been updated and is available here.

@jimbojsb
jimbojsb / gist:1630790
Created January 18, 2012 03:52
Code highlighting for Keynote presentations

Step 0:

Get Homebrew installed on your mac if you don't already have it

Step 1:

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

Step 2:

@wsargent
wsargent / docker_cheat.md
Last active February 16, 2026 02:22
Docker cheat sheet
@AndrasKovacs
AndrasKovacs / ZeroCostGC.md
Last active January 13, 2026 20:27
Garbage collection with zero-cost at non-GC time

Garbage collection with zero cost at non-GC time

Every once in a while I investigate low-level backend options for PL-s, although so far I haven't actually written any such backend for my projects. Recently I've been looking at precise garbage collection in popular backends, and I've been (like on previous occasions) annoyed by limitations and compromises.

I was compelled to think about a system which accommodates precise relocating GC as much as possible. In one extreme configuration, described in this note, there

Bug Report: VComp Child Parent Reference Not Updated During Diff

Summary

When a parent component and its child component both re-render (e.g., both have subscriptions that fire simultaneously), event delegation permanently breaks. Events stop firing because the VTree's VComp.child reference points to a stale child VTree that doesn't match the actual DOM.

Reproduction Scenario

  1. Create a parent component with a subscription (e.g., M.subs = [someSubscription])
  2. Nest a child component that also has its own subscription