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32-bit ELF binary

how to assemble and link:

nasm -f elf32 -o <filename>.o <filename>.asm
ld -m elf_i386 -o <filename> <filename>.o

template code (hello world):

section .text
global _start

rredpoppy

AWS EC2 Spot Instances for GitHub Self-hosted runners

Below CloudFormation stack which runs GitHub Self-hosted runners on EC2 Spot Instances managed by AutoScalingGroup. It automatically register new instances as self-hosted runners and removes them when Spot is interrupted.

How to use?

1. Download YML below into file
2. Create AWS CloudFormation stack
   • Provide values for parameters

• If you need to install smt in UserData fill stack parameter AdditionalUserData

rredpoppy

Advanced Functional Programming with Scala - Notes

Copyright © 2016-2017 Fantasyland Institute of Learning. All rights reserved.

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

rredpoppy

var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";

parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port;     // => "3000"
parser.pathname; // => "/pathname/"
parser.search;   // => "?search=test"
parser.hash;     // => "#hash"
parser.host;     // => "example.com:3000"

rredpoppy

curl http://www.linux-projects.org/listing/uv4l_repo/lrkey.asc | sudo apt-key add -
sudo vi /etc/apt/sources.list
cat /etc/apt/sources.list
deb http://mirrordirector.raspbian.org/raspbian/ wheezy main contrib non-free rpi
deb http://www.linux-projects.org/listing/uv4l_repo/raspbian/ wheezy main

sudo apt-get update
sudo apt-get install uv4l-webrtc
sudo apt-get install uv4l-raspicam-extras
sudo service uv4l_raspicam restart

rredpoppy

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors

rredpoppy

// Bootstrap wants jQuery global =(
window.jQuery = $ = require('jquery')
// Bootstrap doesn't have a "main" field / export anything =(
var bootstrap = require('bootstrap/dist/js/bootstrap')

// Get Bootstrap styles with cssify
var style = require('./node_modules/bootstrap/dist/css/bootstrap.css')

var popover = document.createElement('span')
popover.innerHTML = 'I have a popover'

rredpoppy

$sudo apt-get install libopencv-dev
$mkdir hellocv
$cd hellocv
$mkdir lib

#get opencv-2XX.jar and copy into hellocv/lib
#sudo dpkg -L libopencv-dev
$cp /usr/share/OpenCV/java/opencv-248.jar lib/

$sbt run

rredpoppy

[adrian@localhost ~]$ cat /tmp/alsa-info.txt.LwuI5O5q82 
upload=true&script=true&cardinfo=
!!################################
!!ALSA Information Script v 0.4.64
!!################################

!!Script ran on: Sat Mar  5 09:11:29 UTC 2016


!!Linux Distribution

rredpoppy

(ns braintree-clj.core                                                                                                                              
  (:import [com.braintreegateway BraintreeGateway Environment TransactionRequest Transaction$Type])                                                 
  (:require [clojure.string :as s]                                                                                                                  
            [hiccup.core :as hiccup]                                                                                                                
            [hiccup.page-helpers :as page-helper]                                                                                                   
            [noir.core :as noir]                                                                                                                    
            [noir.request :as noir-req]