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Elixir Primer

Core Concepts

• Functional language built on Erlang VM (BEAM)
• Immutable data - values never change
• Pattern matching as primary control flow
• Process-oriented concurrency (not OS threads)

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Import-Module posh-git
Import-Module PSFzf

# Set initial directory
cd "$HOME\workspace\repos\UI"

# Git aliases
Set-Alias -Name g -Value git
Remove-Item alias:gc -Force -ErrorAction SilentlyContinue
function gs { git status $args }

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XScreenSaver: Simplified Guide

What Is XScreenSaver?

XScreenSaver is a collection of screen savers for X Window System. Each "module" is a standalone program that renders graphics to a window created by the XScreenSaver daemon.

Basic Approach

1. Any program can be a screensaver if it can draw on a window it didn't create
2. You must use C (not C++) because other languages typically can't draw to external windows
3. XScreenSaver provides utility functions to make development easier

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#NoEnv
SendMode Input
SetWorkingDir %A_ScriptDir%

padding := 20

; half screens
^#h::WinMove, A, , padding, padding, (A_ScreenWidth/2)-(padding*1.5), A_ScreenHeight-(padding*2)
^#j::WinMove, A, , padding, (A_ScreenHeight/2)+padding, A_ScreenWidth-(padding*2), (A_ScreenHeight/2)-(padding*2)
^#k::WinMove, A, , padding, padding, A_ScreenWidth-(padding*2), (A_ScreenHeight/2)-(padding*2)

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; AHK v2 script
SetWorkingDir(A_ScriptDir)

; https://github.com/Ciantic/VirtualDesktopAccessor
VDA_PATH := A_ScriptDir . "\VirtualDesktopAccessor.dll"
hVirtualDesktopAccessor := DllCall("LoadLibrary", "Str", VDA_PATH, "Ptr")

GoToDesktopNumberProc := DllCall("GetProcAddress", "Ptr", hVirtualDesktopAccessor, "AStr", "GoToDesktopNumber", "Ptr")

GoToDesktopNumber(num) {

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#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/extensions/shape.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int main() {

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#!/usr/bin/env python3

from flask import Flask, request, redirect, url_for
from markupsafe import escape
import re
import json
import atexit
from urllib.parse import urlparse

app = Flask(__name__)

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PostgreSQL is Enough

• Simplify: move code into database functions
• Just Use Postgres for Everything
• Just use Postgres
• PostgreSQL is the worlds’ best database
• Postgres is eating the database world
• Hacker News discussion

Background and Cron Jobs

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# simple bind mount - directly maps host directory to container
# pro: simple, direct
# con: less docker-native management
volumes:
  - /opt/medusa/postgres:/var/lib/postgresql/data

# named volume with bind properties - docker managed but host-accessible
# pro: docker volume features (named reference, metadata, drivers)
# con: more verbose, possibly overengineered for simple needs
volumes:

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owned