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@giannisp
giannisp / gist:ebaca117ac9e44231421f04e7796d5ca
Last active July 14, 2024 18:27
Upgrade PostgreSQL 9.6.5 to 10.0 using Homebrew (macOS)
After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."
Database files have to be updated before starting the server, here are the steps that had to be followed:
# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
brew unlink postgresql
brew install [email protected]
brew unlink [email protected]
brew link postgresql
@yatsu
yatsu / rbenv-ruby187-macos.sh
Last active July 13, 2023 19:36
Install ruby-1.8.7 with rbenv on macOS Catalina (10.15)
#!/bin/sh
# 1) Install Xcode 11
# 2) Install command line tools: `xcode-select --install`
# 3) Install HomeBrew
# 4) brew tap cartr/qt4 && brew install cartr/qt4/[email protected] subversion rbenv
# 5) Setup rbenv
# 6) Run this command
PKG_CONFIG_PATH="$(brew --prefix cartr/qt4/[email protected])/lib/pkgconfig" \

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.


Effective Engineer - Notes

What's an Effective Engineer?

@yoavniran
yoavniran / ultimate-ut-cheat-sheet.md
Last active July 16, 2025 06:32
The Ultimate Unit Testing Cheat-sheet For Mocha, Chai, Sinon, and Jest
@gijs
gijs / Vagrantfile
Created September 9, 2014 10:13
CoreOS Vagrantfile
# -*- mode: ruby -*-
# # vi: set ft=ruby :
require 'fileutils'
CLOUD_CONFIG_PATH = File.join(File.dirname(__FILE__), "user-data")
CONFIG = File.join(File.dirname(__FILE__), "config.rb")
# Defaults for config options defined in CONFIG
$num_instances = 1
@rodleviton
rodleviton / imagemagick-install-steps
Created May 26, 2014 07:37
Installing Image Magick on Ubuntu 14.04
sudo -i
cd
apt-get install build-essential checkinstall && apt-get build-dep imagemagick -y
wget http://www.imagemagick.org/download/ImageMagick-6.8.7-7.tar.gz
tar xzvf ImageMagick-6.8.9-1.tar.gz
cd ImageMagick-6.8.9-1/
./configure --prefix=/opt/imagemagick-6.8 && make
checkinstall
@meh
meh / lol.exs
Created December 16, 2013 17:29
defmodule Fun do
def arity(fun) do
case :erlang.fun_info(fun, :arity) do
{ :arity, arity } ->
arity
end
end
def adapt!(fun, 0) do
fn -> fun.([]) end
@mobilemind
mobilemind / git-tag-delete-local-and-remote.sh
Last active July 9, 2025 10:55
how to delete a git tag locally and remote
# delete local tag '12345'
git tag -d 12345
# delete remote tag '12345' (eg, GitHub version too)
git push origin :refs/tags/12345
# alternative approach
git push --delete origin tagName
git tag -d tagName
@MohamedAlaa
MohamedAlaa / tmux-cheatsheet.markdown
Last active July 25, 2025 19:32
tmux shortcuts & cheatsheet

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname