simonhaenisch

# boot arch linux (e. g. from usb drive)
# have a wired internet connection before boot or use wifi-menu to connect to your wifi
# https://wiki.archlinux.org/index.php/USB_flash_installation_media#In_macOS

# change keyboard layout
loadkeys de-latin1

# install arch linux ARM for RPi 1/2/3 (download to SD card, if USB stick is too small)
# https://archlinuxarm.org/platforms/armv6/raspberry-pi
# https://archlinuxarm.org/platforms/armv7/broadcom/raspberry-pi-2

simonhaenisch

Nginx Configuration Boilerplate

This is my boilerplate for a Nginx config with SSL. I like the idea of modular includes, so I created a /etc/nginx/includes directory for files that get included into the main config file /etc/nginx/nginx.conf. I moved mime.types and fastcgi.conf to that includes folder. I use a common-location-rules.conf file for location rules that are shared between all sites hosted on the server. Relative paths in include directives are relative to the config prefix path (path to the nginx.conf file, by default /etc/nginx/).

The following files are from h5bp/server-configs-nginx:

• includes/mime.types: here the correct MIME type for javascript (application/javascript instead of text/javascript) is set among others. Using this file is important because the gzip_types rule is set accordingly in gzip.conf.
• **[includes/expires.conf](htt

simonhaenisch

Raspberry Pi: OwnCloud-Synced Slideshows with Frame Buffer

• Install Arch Linux on the Raspberry Pi as explained in https://gist.github.com/simonhaenisch/d086156a5828c0037acd46b48279388f without alsa and shairport
• Create an owncloud user rpi and share folders to be synced (without edit permissions)
• Install owncloud-client: pacman -S owncloud-client
• Install fonts package: pacman -S ttf-dejavu
• Install Frame Buffer Image Viewer: pacman -S fbida
• Install Cron: pacman -S cronie and enable auto-start: systemctl enable cronie
• Create a folder /var/cloud to be synced to

simonhaenisch

import sublime, sublime_plugin

class IncrementSelectionCommand(sublime_plugin.TextCommand):
    # increments each selected number by one
    def run(self, edit):
        for region in self.view.sel():
            value = int(self.view.substr(region))
            self.view.replace(edit, region, str(value + 1))

class DecrementSelectionCommand(sublime_plugin.TextCommand):

simonhaenisch

// example matrix
Mat img = Mat::zeros(256, 128, CV_32FC3);

// get the pointer (cast to data type of Mat)
float *pImgData = (float *)img.data;

// loop through rows, columns and channels
for (int row = 0; row < img.rows; ++row)
{
    for (int column = 0; column < img.cols; ++column)

simonhaenisch

#!/usr/bin/env python
import sys, os
'''
Usage: python rename-files.py [directory] [extension] [new name base]
Example: python rename-files.py . .png frame-
'''

try:
    directory   = sys.argv[1]
    extension   = sys.argv[2]

simonhaenisch

#! /bin/bash

# mv e.g. /dir/00[1|2|3]/file.ext -> /dir/file-[1...3].ext

idx=1         # start index for new file-names (use 0 or zero-based index)
ext=".ext"    # file extension (can be a wildcard)
from="/dir/*" # where to look for files
to="."        # target of mv command, e.g. "dir/"

for file in $from/*$ext; do

simonhaenisch

#! /bin/bash

file="path/to/file.txt"

# encrypt
openssl enc -aes-256-cbc -e -in "$file" -out "${file}_encrypted" -pass pass:<password>

# decrypt
openssl enc -aes-256-cbc -d -in "$file" -out "${file}_decrypted" -pass pass:<password>

simonhaenisch

// npm install node-sass

var fs = require('fs'),
    sass = require('node-sass');
    
// specify in-/output files
var inFile  = '/path/to/main.scss',
    outFile = '/path/to/main.css';

sass.render(

simonhaenisch

[
    {
        "keys": ["f8"],
        "command": "repl_open",
        "args": {
            "cmd": ["python", "-u", "$file_basename"],
            "cwd": "$file_path",
            "encoding": "utf8",
            "extend_env": {"PYTHONIOENCODING": "utf-8"},
            "external_id": "python",