Jon N joenas

## introrx.md

      
              7 files
            
          
              2516 forks
            
          
              468 comments
            
          
              21904 stars
            
          
                staltz
                / introrx.md
            
            
              Last active
              May 6, 2024 01:44
            
              
                The introduction to Reactive Programming you've been missing
              
          
    The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.


## script-template.sh
#!/usr/bin/env bash

set -Eeuo pipefail
trap cleanup SIGINT SIGTERM ERR EXIT

script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)

usage() {
  cat <<EOF
Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p param_value arg1 [arg2...]

## docker-nfs-volumes.md

      
              1 file
            
          
              20 forks
            
          
              4 comments
            
          
              67 stars
            
          
                ruanbekker
                / docker-nfs-volumes.md
            
            
              Created
              December 10, 2017 10:43
            
              
                NFS Volumes with Docker Swarm
              
          
    Create NFS Volumes:

Creating the NFS Volume:
$ docker volume create --driver local \
  --opt type=nfs \
  --opt o=addr=192.168.1.115,uid=1000,gid=1000,rw \
  --opt device=:/mnt/volumes/mysql-test \
  mysql-test-1

  
## list-deps.cr
unless ARGV.size > 0
  puts "  Missing executable file argument"
  puts "  Usage (in a Dockerfile)"
  puts "  RUN crystal run ./path/to/list-deps.cr -- ./bin/executable"
  exit 1
end

executable = File.expand_path(ARGV[0])

unless File.exists?(executable)

## gist:6234664
Let’s Get Started

Our box is freshly hatched, virgin pixels at the prompt. I favor Ubuntu; if you use another version of linux, your commands may vary. Five minutes to go:

passwd

Change the root password to something long and complex. You won’t need to remember it, just store it somewhere secure - this password will only be needed if you lose the ability to log in over ssh or lose your sudo password.

apt-get update
apt-get upgrade

## gist:3590737

      
              1 file
            
          
              16 forks
            
          
              30 comments
            
          
              104 stars
            
          
                cpjolicoeur
                / gist:3590737
            
            
              Created
              September 1, 2012 23:15
            
              
                Ordering a query result set by an arbitrary list in PostgreSQL
              
          
    I'm hunting for the best solution on how to handle keeping large sets of DB records "sorted" in a performant manner.
Problem Description

Most of us have work on projects at some point where we have needed to have ordered lists of objects.  Whether it be a to-do list sorted by priority, or a list of documents that a user can sort in whatever order they want.
A traditional approach for this on a Rails project is to use something like the acts_as_list gem, or something similar.  These systems typically add some sort of "postion" or "sort order" column to each record, which is then used when querying out the records in a traditional order by position SQL query.
This approach seems to work fine for smaller datasets, but can be hard to manage on large data sets with hundreds (or thousands) of records needing to be sorted. Changing the sort position of even a single object will require updating every single record in the database that is in the same sort group. This requires potentially thousands of wri

  
## msys_hetzner-etc_network_interfaces
# /etc/network/interfaces
#
auto lo
iface lo inet loopback

# device: eth0
iface eth0 inet manual

# IPv4 bridge
# (connect ONLY your firewall/router KVM instance here, this is the WAN device!)

## ios-8-web-app.html
<!doctype html>

<!-- http://taylor.fausak.me/2015/01/27/ios-8-web-apps/ -->

<html>
  <head>
    <title>iOS 8 web app</title>

    <!-- CONFIGURATION -->

## rpi-hdmi.sh
#!/bin/sh

# Enable and disable HDMI output on the Raspberry Pi

is_off ()
{
	vcgencmd display_power | grep "display_power=0" >/dev/null
}

case $1 in

## sinatra_dokku.md

      
              1 file
            
          
              2 forks
            
          
              2 comments
            
          
              15 stars
            
          
                underhilllabs
                / sinatra_dokku.md
            
            
              Last active
              December 7, 2023 16:19
            
              
                Setting up a Sinatra app on Dokku
              
          
    There are a few additional steps I noticed to setting up a Sinatra app to work on Dokku. (These are probably also required for deploying an app to Heroku.)
original app.rb
require 'sinatra'

get '/' do
  "Your Sinatra app is not quite Dokku-fied!"
end
	#!/usr/bin/env bash

	set -Eeuo pipefail
	trap cleanup SIGINT SIGTERM ERR EXIT

	script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)

	usage() {
	cat <<EOF
	Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p param_value arg1 [arg2...]
	unless ARGV.size > 0
	puts " Missing executable file argument"
	puts " Usage (in a Dockerfile)"
	puts " RUN crystal run ./path/to/list-deps.cr -- ./bin/executable"
	exit 1
	end

	executable = File.expand_path(ARGV[0])

	unless File.exists?(executable)
	Let’s Get Started

	Our box is freshly hatched, virgin pixels at the prompt. I favor Ubuntu; if you use another version of linux, your commands may vary. Five minutes to go:

	passwd

	Change the root password to something long and complex. You won’t need to remember it, just store it somewhere secure - this password will only be needed if you lose the ability to log in over ssh or lose your sudo password.

	apt-get update
	apt-get upgrade
	# /etc/network/interfaces
	#
	auto lo
	iface lo inet loopback

	# device: eth0
	iface eth0 inet manual

	# IPv4 bridge
	# (connect ONLY your firewall/router KVM instance here, this is the WAN device!)
	<!doctype html>

	<!-- http://taylor.fausak.me/2015/01/27/ios-8-web-apps/ -->

	<html>
	<head>
	<title>iOS 8 web app</title>

	<!-- CONFIGURATION -->
	#!/bin/sh

	# Enable and disable HDMI output on the Raspberry Pi

	is_off ()
	{
	vcgencmd display_power \| grep "display_power=0" >/dev/null
	}

	case $1 in