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Dan Phillips dphilla

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@kconner
kconner / macOS Internals.md
Last active November 6, 2025 09:43
macOS Internals

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

@andy-thomason
andy-thomason / Genomics_A_Programmers_Guide.md
Created May 14, 2019 13:32
Genomics a programmers introduction

Genomics - A programmer's guide.

Andy Thomason is a Senior Programmer at Genomics PLC. He has been witing graphics systems, games and compilers since the '70s and specialises in code performance.

https://www.genomicsplc.com

@jcasimir
jcasimir / hacking_for_fun_power_and_profit.markdown
Last active September 19, 2018 01:16

Hacking for Fun, Power, and Profit

Part 1: Understanding the Landscape

Agreeing to Terms

  • "Hacking" code = programming
  • "Hacking" hardware/etc = building things against their intent
  • "Hacking" in a traditional sense: people or computers/software
@mperham
mperham / frag.rb
Last active April 26, 2023 18:22
memory fragmentation on ruby 2.5.1
=begin
This script attempts to reproduce poor glibc allocator behavior within Ruby, leading
to extreme memory fragmentation and process RSS bloat.
glibc allocates memory using per-thread "arenas". These blocks can easily fragment when
some objects are free'd and others are long-lived.
Our script runs multiple threads, all allocating randomly sized "large" Strings between 4,000
and 40,000 bytes in size. This simulates Rails views with ERB creating large chunks of HTML
to output to the browser. Some of these strings are kept around and some are discarded.
@sulmanweb
sulmanweb / _document.json.jbuilder
Created May 13, 2018 08:04
Active Storage as Attachment in Rails API with base64 decoding
json.extract! document, :id, :documentable_type, :documentable_id, :created_at
json.url rails_blob_url(document.doc)
@JoshCheek
JoshCheek / program.c
Last active April 6, 2018 17:28
Memory allocation, NULL, dereferencing.
// After you think you understand this program, try writing it yourself until
// you can get it to work, the first time, without error ^_^
//
// ALSO: remember:
// $ gcc program.c # compile
// $ ./a.out # run
// We'll get `printf` from standard input/output's header file
#include <stdio.h>
@matthewzring
matthewzring / markdown-text-101.md
Last active December 5, 2025 09:13
A guide to Markdown on Discord.

Markdown Text 101

Want to inject some flavor into your everyday text chat? You're in luck! Discord uses Markdown, a simple plain text formatting system that'll help you make your sentences stand out. Here's how to do it! Just add a few characters before & after your desired text to change your text! I'll show you some examples...

What this guide covers:

@worace
worace / gis_workshop.org
Last active February 6, 2023 02:56
@josh-works
josh-works / on_learning.md
Last active September 3, 2018 20:14

On Learning

topics: {
      DEEP WORK:
        protect and cultivate (limited) attention,
        ear plugs,
        skeptical of music,
        examine your own process,
 downtime,
@wafiq
wafiq / rails-5-6-ubuntu-mina-puma-nginx.md
Last active November 27, 2023 02:43
How to deploy Rails 5/6 in Ubuntu VM using Mina deployment with Puma webserver and Nginx

Rails 5 and 6 Deployment with Ubuntu, Mina, Puma and Nginx

Based on this tutorial but simplified and inlined. Particularly removed any Rails and 3rd party services part, assumed you just need deployment to any Ubuntu machine.

Prerequisite

  1. A functional Rails app
  2. Hosted Git repository (Github, Bitbucket, Gitlab)
  3. Cloud hosting account (Digital Ocean, Vultr, Linode, Lightsail)
  4. Local SSH account