billywhizz

#!/bin/bash
git clone https://github.com/just-js/lo.git
cd lo/
make lo
export LO_HOME=$(pwd)
./lo build binding bestlines
cd ..
lo/lo build runtime test-dlopen
./test-dlopen 

billywhizz

#include <stdio.h>
#include <sys/inotify.h>
#include <sys/time.h>

#include <sys/epoll.h>
#include <errno.h>

#include <linux/memfd.h>
#include <sys/mman.h>
#include <sys/syscall.h>

billywhizz

GOAMD64=v2 go build foo.go

billywhizz

☁️ How I got off the cloud and migrated everything from AWS to a VPS in Hetzner

This is an opinionated handbook on how I migrated all my Rails apps off the cloud and into VPS.

This is how I manage real production loads for my Rails apps. It assumes:

• Rails 7+
• Ruby 3+
• PostgreSQL
• Ubuntu Server 24.04
• Capistrano, Puma, Nginx

billywhizz

WITH RECURSIVE transitive_dependencies AS (
    SELECT package_id AS dependency_id, package_id AS root_id
    FROM dependencies
    WHERE kind = 'runtime'
  UNION ALL
    SELECT d.package_id, td.root_id
    FROM dependencies d
    JOIN transitive_dependencies td ON td.dependency_id = d.package_id AND td.dependency_id <> td.root_id  -- Avoid self-joins
    WHERE d.kind = 'runtime'
),

billywhizz

<%@ language="Javascript" %>

<script language="javascript" runat="server" src='json2.js'></script>
<script language="javascript" runat="server" src='stringExtensions.js'></script>
<script language="javascript" runat="server" src='contentNego.js'></script>
<script language="javascript" runat="server">

(function() {

    // In an ASP scenario, this fn gets "exported"

billywhizz

$ cd /dev/shm/
$ git clone git@github.com:denoland/pm-benchmark.git
$ cd pm-benchmark/
$ mkdir testbed
$ cp -R fixture/* testbed/
$ cd testbed/
$ sync
$ sudo sh -c "echo 3 > /proc/sys/vm/drop_caches"
[sudo] password for andrew: 

billywhizz

// will be called via bun-parallel-setup.ts

let i = 0;

Bun.serve({
  port: process.env.PORT || 8000,
  development: false,

  // Share the same port across multiple processes
  // This is the important part!

billywhizz

THE PROBLEM

🌲 Invert a binary tree! 🌲

Except with 3 catches:

1. It must invert the keys ("bit-reversal permutation")
2. It must be a dependency-free, pure recursive function
3. It must have type Bit -> Tree -> Tree (i.e., a direct recursion with max 1 bit state)

billywhizz

hi, i'm daniel. i'm a 15-year-old with some programming experience and i do a little bug hunting in my free time. here's the insane story of how I found a single bug that affected over half of all Fortune 500 companies:

say hello to zendesk

If you've spent some time online, you’ve probably come across Zendesk.

Zendesk is a customer service tool used by some of the world’s top companies. It’s easy to set up: you link it to your company’s support email (like support@company.com), and Zendesk starts managing incoming emails and creating tickets. You can handle these tickets yourself or have a support team do it for you. Zendesk is a billion-dollar company, trusted by big names like Cloudflare.

Personally, I’ve always found it surprising that these massive companies, worth billions, rely on third-party tools like Zendesk instead of building their own in-house ticketing systems.

your weakest link