chourobin

var QcValueConverter = {
  tensionFromQcValue: function(qcValue) {
    return (qcValue - 30.0) * 3.62 + 194.0;
  },

  qcValueFromTension: function(tension) {
    return (tension - 194.0) / 3.62 + 30.0;
  },

  frictionFromQcValue: function(qcValue) {

chourobin

NB: Originally courtesy of http://blog.taggesell.de/index.php?/archives/73-Managing-Amazon-EC2-SSH-login-and-protecting-your-instances.html

Managing Amazon EC2 - SSH login and protecting your instances

How to log into your freshly fired-up instances and how to secure ssh access
(works under Linux and Mac OS, under Windows with Cygwin)

First time you want to log into a newly started instance you appear to have the chicken-and-egg problem: how to log in when you do not know the root password? Luckily Amazon devised a comfortable way to circumvent this: your Key Pairs. these are not to be confused with the „Access Key IDs“ on the Access Identifier web page and they are neither the X509 certificates. These Key pairs are automatically generated the first time you log into the web console and you can only download its private part. Store it in your ~/.ssh directory. In case you missed the download or don't know where you've put it AND you don't have any instances running, just generate and download a new one. 

chourobin

//
//  FileFunctionLevelFormatter.h
//  Stylist
//
//  Created by Robin Chou on 10/23/14.
//  Copyright (c) 2014 Voila. All rights reserved.
//

#import "DDLog.h"

chourobin

# Uncrustify 0.60
newlines                                 = auto
input_tab_size                           = 4
output_tab_size                          = 4
string_escape_char                       = 92
string_escape_char2                      = 0
tok_split_gte                            = false
utf8_bom                                 = ignore
utf8_byte                                = false
utf8_force                               = false

chourobin

Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

• Scaling Twitter: Making Twitter 10000 Percent Faster
• Scaling Twitter
• Blaine Cook on Scaling Twitter - YouTube

chourobin

@implementation UITextView (RSExtras)


static BOOL stringCharacterIsAllowedAsPartOfLink(NSString *s) {

    /*[s length] is assumed to be 0 or 1. s may be nil.
     Totally not a strict check.*/

    if (s == nil || [s length] < 1)
        return NO;

chourobin

.modal-backdrop {
  background: #000;
	background: rgba(0,0,0,0.9);
	background: -webkit-radial-gradient(50% 50%, ellipse closest-corner, rgba(0,0,0,0.45) 1%, rgba(0,0,0,0.8) 100%);
	background: -moz-radial-gradient(50% 50%, ellipse closest-corner, rgba(0,0,0,0.45) 1%, rgba(0,0,0,0.8) 100%);
	background: -ms-radial-gradient(50% 50%, ellipse closest-corner, rgba(0,0,0,0.45) 1%, rgba(0,0,0,0.8) 100%);
	background: radial-gradient(50% 50%, ellipse closest-corner, rgba(0,0,0,0.45) 1%, rgba(0,0,0,0.8) 100%);
	filter: alpha(opacity = 80);
	opacity: 0;

chourobin

cd ~
sudo apt-get update
sudo apt-get install openjdk-7-jre -y

wget https://github.com/downloads/elasticsearch/elasticsearch/elasticsearch-0.19.11.tar.gz -O elasticsearch.tar.gz
tar -xf elasticsearch.tar.gz
rm elasticsearch.tar.gz
sudo mv elasticsearch-* elasticsearch
sudo mv elasticsearch /usr/local/share

chourobin

require 'clockwork'
require 'sidekiq'

# load all jobs from app/jobs directory
# no need to load rails env, we only care about classes 
# (#perform method is not invoked in this process)
Dir["app/jobs/*"].each {|f| load f } 

module Clockwork
  every(1.day, 'midnight.job', :at => '00:00'){

chourobin

RAILS_ENV=production rake db:setup
# produces the error below.....hmmm.....it's a no-worky
psql:/yourprojectpath/yourproject/db/structure.sql:29: ERROR:  could not open extension control file "/usr/share/postgresql/9.1/extension/hstore.control": No such file or directory

# hstore postgresql extension needs to be installed, so....
sudo apt-get install postgresql-contrib

# now your extension should be available to enable so log in with psql
psql -d yourproject_production -U yourdbuser -W