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@bokmann
bokmann / JRuby Awesome Performance
Last active August 31, 2023 07:32
brief summary of massive performance improvements with JRuby
# Thee will be more information here when I share the entire problem space I'm working on, but
# in short, this is preview material for my second talk in a series called "What Computer Scientists Know".
# The first talk is on recursion, and goes through several examples., leading up to a problem based
# on a simple puzzle that initial estimates based on performance of a previous puzzle would take years
# to solve on modern computers with the techniques shown in Ruby. That sets the stage for improving the
# performance of that problem with threading, concurrency, and related tuning.
#
# The second talk is on threading and concurrency, touching on algorithmic performance as well.
# Using some knowledge of the problem (board symmetry, illegal moves, etc), we reduce the problem space
# to about .5% of what we initially thought it was. Still, the initial single threaded solution took more
@macintux
macintux / erlang-resources.md
Last active December 15, 2025 22:31
Erlang online resources

This is not intended to be comprehensive or authoritative, just free online resources I've found valuable while learning more about Erlang.

Joe Armstrong's Swedish Institute of Computer Science homepage (Wayback Machine)

https://web.archive.org/web/20070429181654/http://www.sics.se/~joe/

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@kendellfab
kendellfab / goto-sublime
Created August 1, 2013 20:53
Add mouse click `goto definition` in sublime text 3.
Linux - create "Default (Linux).sublime-mousemap" in ~/.config/sublime-text-3/Packages/User
Mac - create "Default (OSX).sublime-mousemap" in ~/Library/Application Support/Sublime Text 3/Packages/User
Win - create "Default (Windows).sublime-mousemap" in %appdata%\Sublime Text 3\Packages\User
[
{
"button": "button1",
"count": 1,
"modifiers": ["ctrl"],
"press_command": "drag_select",
@rweald
rweald / simple-linear-regression.rb
Created August 29, 2012 19:13
Simple Linear Regression in Ruby
class SimpleLinearRegression
def initialize(xs, ys)
@xs, @ys = xs, ys
if @xs.length != @ys.length
raise "Unbalanced data. xs need to be same length as ys"
end
end
def y_intercept
mean(@ys) - (slope * mean(@xs))
@andkerosine
andkerosine / raskell.rb
Created August 15, 2012 05:56
Haskell-like list comprehensions in Ruby
$stack, $draws = [], {}
def method_missing *args
return if args[0][/^to_/]
$stack << args.map { |a| a or $stack.pop }
$draws[$stack.pop(2)[0][0]] = args[1] if args[0] == :<
end
class Array
def +@
@tokarev-yuriy
tokarev-yuriy / .gitignore
Created July 15, 2012 23:01
Bitrix gitignore
*.swp
*.swo
.idea
bitrix/components/bitrix/*
bitrix/php_interface/dbconn.php
bitrix/managed_cache/*
bitrix/stack_cache/*
bitrix/wizards/*
bitrix/themes/*
bitrix/gadgets/*
@mikhailov
mikhailov / 0. nginx_setup.sh
Last active August 29, 2025 05:48
NGINX+SPDY with Unicorn. True Zero-Downtime unless migrations. Best practices.
# Nginx+Unicorn best-practices congifuration guide. Heartbleed fixed.
# We use latest stable nginx with fresh **openssl**, **zlib** and **pcre** dependencies.
# Some extra handy modules to use: --with-http_stub_status_module --with-http_gzip_static_module
#
# Deployment structure
#
# SERVER:
# /etc/init.d/nginx (1. nginx)
# /home/app/public_html/app_production/current (Capistrano directory)
#
@piatra
piatra / app.js
Created June 27, 2012 12:14
xhr2 + nodejs + filereader = resumable uploads
var http = require('http')
, formidable = require('formidable')
, fs = require('fs')
, qs = require('querystring')
, util = require('util')
, uploads = {};
http.createServer(function(req, res){
if(req.method == 'GET') {
if(req.url != '/favicon.ico') {
@jorgenpt
jorgenpt / stream.sh
Created April 21, 2012 06:59
Commands to stream desktop to justin.tv on OS X
#!/bin/sh -xe
API_KEY="YOUR_API_KEY_GOES_HERE"
FPS="10"
VLC_PATH="/Applications/VLC.app/Contents/MacOS/VLC"
# I don't know how this'll behave on multimon, so you might want to hard-code.
# INRES='1440x900'
INRES=$(osascript -e 'tell application "Finder" to get bounds of window of desktop'|sed 's/, /x/g'|cut -f3- -dx)
OUTRES='1280x800'
# You can change this to record microphone or something else, from man soxformat (under coreaudio):
@steveclarke
steveclarke / capybara.md
Created April 10, 2012 17:32
RSpec Matchers

Capybara

save_and_open_page

Matchers

have_button(locator)