Skip to content

Instantly share code, notes, and snippets.

@alexvandesande
alexvandesande / Random generator
Last active December 23, 2022 09:10
A very simple random generator. A miner can influence the number by not publishing a block with an unwanted outcome, and forfeiting the 5 block reward.
contract random {
/* Generates a random number from 0 to 100 based on the last block hash */
function randomGen(uint seed) constant returns (uint randomNumber) {
return(uint(sha3(block.blockhash(block.number-1), seed ))%100);
}
/* generates a number from 0 to 2^n based on the last n blocks */
function multiBlockRandomGen(uint seed, uint size) constant returns (uint randomNumber) {
uint n = 0;
for (uint i = 0; i < size; i++){
<![if lt IE 9]><script type="text/javascript">
var s = document.createElement("script"); s.type = "text/javascript";s.src = "https://www.fundamine.com/fundamineannotate?fmrequestorurl="+window.location.href.split("?")[0];
document.getElementsByTagName("head")[0].appendChild(s);
</script><![endif]>
@AnderWeb
AnderWeb / Simple setup for item backgrounds pre - post lollipop
Last active January 12, 2024 18:04
Simple setup for item backgrounds pre/post lollipop
AppCompat-v7:21 provides a very useful way of dealing with pressed/focused/activated states maintaining backwards compatibility downto API-7, but there's a small issue (big for some) with the default selectableItemBackground: It uses some PNGs and/or default values for API<21.
The main reason is that android drawable resource definitions (prior API 21) CANNOT use theme attributes at all, so there's no way of making something like:
<shape android:shape="rectangle">
<solid android:color="?attr/colorControlHighlight" />
</shape>
For this, I've put this simple mockup on how to give your app better drawables that the appcompat defaults.
@xdamman
xdamman / install_ffmpeg_ubuntu.sh
Created July 2, 2014 21:03
Install latest ffmpeg on ubuntu 12.04 or 14.04
#!/bin/bash
# Bash script to install latest version of ffmpeg and its dependencies on Ubuntu 12.04 or 14.04
# Inspired from https://gist.github.com/faleev/3435377
# Remove any existing packages:
sudo apt-get -y remove ffmpeg x264 libav-tools libvpx-dev libx264-dev
# Get the dependencies (Ubuntu Server or headless users):
sudo apt-get update
@tristanfisher
tristanfisher / Ansible-Vault how-to.md
Last active August 27, 2025 16:19
A short tutorial on how to use Vault in your Ansible workflow. Ansible-vault allows you to more safely store sensitive information in a source code repository or on disk.

Working with ansible-vault


I've been using a lot of Ansible lately and while almost everything has been great, finding a clean way to implement ansible-vault wasn't immediately apparent.

What I decided on was the following: put your secret information into a vars file, reference that vars file from your task, and encrypt the whole vars file using ansible-vault encrypt.

Let's use an example: You're writing an Ansible role and want to encrypt the spoiler for the movie Aliens.

@MrDHat
MrDHat / random.py
Created March 1, 2014 19:38
Random Number Generator in Python
# imports for abstract classes
from abc import ABCMeta, abstractmethod
import time
''' ==============================================================================================
Seed Classes
==============================================================================================='''
class Seed(object):
"""Abstract class for seeds"""
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:0.4'
}
}
apply plugin: 'android'
@didip
didip / tornado-nginx-example.conf
Created January 30, 2011 05:19
Nginx config example for Tornado
worker_processes 2;
error_log /var/log/nginx/error.log;
pid /var/run/nginx.pid;
events {
worker_connections 1024;
use epoll;
}