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@majackson
majackson / migrations.md
Last active May 24, 2024 12:10
Django migrations without downtime

Django Migrations without Downtime

The following instructions describe a set of processes allowing you to run Django database migrations against a production database without having to bring the web service down.

Note that in the below instructions, migrations are all run manually at explicit points, and are not an automatic part of the deployment process.

Adding Fields or Tables

Adding a (nullable) field or a new table

  1. Make the model or column addition in your code.
@klange
klange / _.md
Last active May 23, 2024 13:45
It's a résumé, as a readable and compilable C source file. Since Hacker News got here, this has been updated to be most of my actual résumé. This isn't a serious document, just a concept to annoy people who talk about recruiting and the formats they accept résumés in. It's also relatively representative of my coding style.

Since this is on Hacker News and reddit...

  • No, I don't distribute my résumé like this. A friend of mine made a joke about me being the kind of person who would do this, so I did (the link on that page was added later). My actual résumé is a good bit crazier.
  • I apologize for the use of _t in my types. I spend a lot of time at a level where I can do that; "reserved for system libraries? I am the system libraries".
  • Since people kept complaining, I've fixed the assignments of string literals to non-const char *s.
  • My use of type * name, however, is entirely intentional.
  • If you're using an older compiler, you might have trouble with the anonymous unions and the designated initializers - I think gcc 4.4 requires some extra braces to get them working together. Anything reasonably recent should work fine. Clang and gcc (newer than 4.4, at le
@vsajip
vsajip / pyvenvex.py
Last active May 18, 2024 23:13
A script which demonstrates how to extend Python 3.3's EnvBuilder, by installing setuptools and pip in created venvs. This functionality is not provided as an integral part of Python 3.3 because, while setuptools and pip are very popular, they are third-party packages.The script needs Python 3.3 or later; invoke it using"python pyvenvex.py -h"fo…
#
# Copyright (C) 2013-2020 Vinay Sajip. New BSD License.
#
import os
import os.path
from subprocess import Popen, PIPE
import sys
from threading import Thread
from urllib.parse import urlparse
from urllib.request import urlretrieve
@olets
olets / zsh-plugin-manager-plugin-installation-procedures.md
Last active May 18, 2024 21:40
zsh plugin manager cross-reference

Instructions for installing zsh plugins, for a variety of plugin managers

  • antibody: Add <owner>/<repo> to your plugins file. If you use static loading update the sh.

  • Antigen: Add antigen bundle <owner>/<repo> to your .zshrc.

  • Oh-My-Zsh:

    • Clone to OMZ's plugins' directory:
@davialexandre
davialexandre / gruvbox_dark.json
Created June 23, 2019 18:09
Gruvbox Dark color scheme for the new Windows Terminal
{
"background" : "#282828",
"black" : "#282828",
"blue" : "#458588",
"brightBlack" : "#928374",
"brightBlue" : "#83A598",
"brightCyan" : "#8EC07C",
"brightGreen" : "#B8BB26",
"brightPurple" : "#D3869B",
"brightRed" : "#FB4934",
@appeltel
appeltel / pubsub.py
Last active May 5, 2024 09:40
asyncio pubsub example
import asyncio
import random
class Hub():
def __init__(self):
self.subscriptions = set()
def publish(self, message):

Electron is tricky to get set up on Windows Subsystem for Linux, but it can work!

Four things needed overall:

  1. you need WSL2, not WSL1
  2. you need node, of course, and that part isn't so bad
  3. you need to apt install several dependencies
  4. you need an X Server so it can display the electron GUI over in Windows-land

Setup instructions, in order:

@robin-a-meade
robin-a-meade / unofficial-bash-strict-mode.md
Last active March 24, 2024 17:21
Unofficial bash strict mode

Unofficial Bash Strict Mode

Sometimes a programming language has a "strict mode" to restrict unsafe constructs. E.g., Perl has use strict, Javascript has "use strict", and Visual Basic has Option Strict. But what about bash? Well, bash doesn't have a strict mode as such, but it does have an unofficial strict mode:

set -euo pipefail

set -e

#!/usr/bin/env python
import multiprocessing
import random
import time
class Logger:
def __init__(self, num_lines, last_output_per_process, terminal_lock):
self.num_lines = num_lines
@kachayev
kachayev / concurrency-in-go.md
Last active March 11, 2024 11:27
Channels Are Not Enough or Why Pipelining Is Not That Easy