This is a proof-of-concept of a couple of concurrent data structures written in Ruby.
The implementations are heavily commented for those interested. There are benchmarks (with results) included below. The results are interesting, but, as always, take with a grain of salt.
AtomicLinkedQueue is a lock-free queue, built on atomic CAS operations.
| // layout file | |
| <body> | |
| <div class="container"> | |
| <%= flash_messages %> | |
| <%= yield %> | |
| </div><!-- /container --> | |
| </body> |
| require "net/http" | |
| def start_server | |
| # Remove the X to enable the parameters for tuning. | |
| # These are the default values as of Ruby 2.2.0. | |
| @child = spawn(<<-EOC.split.join(" ")) | |
| XRUBY_GC_HEAP_FREE_SLOTS=4096 | |
| XRUBY_GC_HEAP_INIT_SLOTS=10000 | |
| XRUBY_GC_HEAP_GROWTH_FACTOR=1.8 | |
| XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0 |
It's a common misconception that [William Shakespeare][1] and [Miguel de Cervantes][2] died on the same day in history - so much so that UNESCO named April 23 as [World Book Day because of this fact][3]. However because England hadn't yet adopted [Gregorian Calendar Reform][4] (and wouldn't until [1752][5]) their deaths are actually 10 days apart. Since Ruby's Time class implements a [proleptic Gregorian calendar][6] and has no concept of calendar reform then there's no way to express this. This is where DateTime steps in:
>> shakespeare = DateTime.iso8601('1616-04-23', Date::ENGLAND)
=> Tue, 23 Apr 1616 00:00:00 +0000
>> cervantes = DateTime.iso8601('1616-04-23', Date::ITALY)
=> Sat, 23 Apr 1616 00:00:00 +0000
| require 'socket' | |
| require 'openssl' | |
| require 'puma/server' | |
| require 'ds9' | |
| class Server < DS9::Server | |
| def initialize socket, app | |
| @app = app | |
| @read_streams = {} | |
| @write_streams = {} |
Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Moby VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).
docker run -it --rm --privileged --pid=host justincormack/nsenter1
more info: https://github.com/justincormack/nsenter1
| #! /usr/bin/env bash | |
| # Install any build dependencies needed for curl | |
| sudo apt-get build-dep curl | |
| # Get latest (as of Feb 25, 2016) libcurl | |
| mkdir ~/curl | |
| cd ~/curl | |
| wget http://curl.haxx.se/download/curl-7.47.0.tar.bz2 | |
| tar -xvjf curl-7.47.0.tar.bz2 |
Custom recipe to get OS X 10.11 El Capitan running from scratch, setup applications and developer environment. This is very similar (and currently mostly the same) as my 10.10 Yosemite setup recipe (as found on this gist https://gist.github.com/kevinelliott/0726211d17020a6abc1f). Note that I expect this to change significantly as I install El Capitan several times.
I use this gist to keep track of the important software and steps required to have a functioning system after a semi-annual fresh install. On average, I reinstall each computer from scratch every 6 months, and I do not perform upgrades between distros.
This keeps the system performing at top speeds, clean of trojans, spyware, and ensures that I maintain good organizational practices for my content and backups. I highly recommend this.
You are encouraged to fork this and modify it to your heart's content to match your own needs.
This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.
The script is here:
#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"
#Letsencrypt Ubuntu 14.04 Nginx Letsencrypt (https://letsencrypt.org) is an initative which aims to increase the use of encryption for websites. It basically allows people to apply for free certificates provided that they prove the they control the requested domain.
Note: As of 8th March 2016 letsencrypt is still in public beta.
##Installation To install the client, clone the repostiory from github.
git clone https://github.com/letsencrypt/letsencrypt.git