O-I

One of the many reasons I love working with Ruby is it has a rich vocabulary that allows you to accomplish your goals with a minimal amount of code. If there isn't a method that does exactly what you want, it's usually possible to build an elegant solution yourself.

Let's take the example of simulating the rolling of a die.

We can represent a die as an array of its faces.

die = [*?⚀..?⚅]
# => ["⚀", "⚁", "⚂", "⚃", "⚄", "⚅"]

boopathi

Settings

1. Create a project in XCode with the default settings
   • iOS > Application > Single View Application
   • Language: Swift
2. Under project General settings, add ReactKit to Linked Framework and Libraries
   • + > Add Other... and choose /path/to/react-native/ReactKit/ReactKit.xcodeproj
3. Now ReactKit would have been imported. Link it by choosing it from the list.
   • + > lib.ReactKit.a
4. Under project Build Settings,

bradp

echo "Creating an SSH key for you..."
ssh-keygen -t rsa

echo "Please add this public key to Github \n"
echo "https://github.com/account/ssh \n"
read -p "Press [Enter] key after this..."

echo "Installing xcode-stuff"
xcode-select --install

jaygooby

If you import live data into Google Docs spreadsheets using the importdata function and you want to force a refresh at a certain interval, but you also want to ensure that some cache-busting goes on, append a querystring that's the epoch time value that the refresh occurs, so for a sheet that should grab new data every hour you could force an update like this:

importData("http://example.com/data.csv?" & hour(googleclock()) & ")")

But the url requested looks like this: http://example.com/data.csv?11 if the refresh happened at 11am. The next day at 11, the url will be the same, so there's a chance you may get cached data. To get around this, use an epoch time-based refresh. The formula:

=((date(year(googleclock()),month(googleclock()),day(googleclock())) & " " & time(hour(googleclock()), 0, 0)) - DATE( 1970;1;1))*86400

gives you the epoch timestamp for the time at the current hour. If you wanted the timest

justinweiss

# Call scopes directly from your URL params:
#
#     @products = Product.filter(params.slice(:status, :location, :starts_with))
module Filterable
  extend ActiveSupport::Concern

  module ClassMethods
    
    # Call the class methods with names based on the keys in <tt>filtering_params</tt>
    # with their associated values. For example, "{ status: 'delayed' }" would call 

JeanMertz

#!/bin/bash
#
# This file is managed by Chef, using the <%= node.name %> cookbook.
# Editing this file by hand is highly discouraged!
#

# Copyright (c) 2014 Jean Mertz <jean@mertz.fm>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal

bittner

#!/bin/bash

# This script will migrate schema and data from a SQLite3 database to PostgreSQL.
# Schema translation based on http://stackoverflow.com/a/4581921/1303625.
# Some column types are not handled (e.g blobs).
# 
# See also:
# - http://stackoverflow.com/questions/4581727/convert-sqlite-sql-dump-file-to-postgresql
# - https://gist.github.com/bittner/7368128

matthutchinson

#!/usr/bin/env ruby
# Pass in the name of the site you wich to create a cert for

domain_name =  ARGV[0]

if domain_name == nil
  puts "Y U No give me a domain name?"
else
  system "openssl genrsa -out #{domain_name}.key 1024"
  system "openssl req -new -key #{domain_name}.key -out #{domain_name}.csr -subj '/C=US/ST=NJ/L=Monroe/O=MyCompany/OU=IT/CN=#{domain_name}'"

czarneckid

Zero downtime deploys with unicorn + nginx + runit + rvm + chef

Below are the actual files we use in one of our latest production applications at Agora Games to achieve zero downtime deploys with unicorn. You've probably already read the GitHub blog post on Unicorn and would like to try zero downtime deploys for your application. I hope these files and notes help. I am happy to update these files or these notes if there are comments/questions. YMMV (of course).

Other application notes:

• Our application uses MongoDB, so we don't have database migrations to worry about as with MySQL or postgresql. That does not mean that we won't have to worry about issues with the database with indexes being built in MongoDB or what have you.
• We use capistrano for deployment.

Salient points for each file:

jamesmoriarty

namespace :deploy do
  namespace :sidekiq do
    desc 'Replace upstart config for sidekiq-workers'
    task :upstart_config do
      data = %Q{
        start on runlevel [2345]
        stop on runlevel [!2345]
        respawn

        exec su - #{user} -c 'cd #{release_path}; export RAILS_ENV=#{stage};  bundle exec sidekiq -q default,1 -c 4 -pid #{release_path}/tmp/pids/sidekiq.pid >> #{release_path}/log/sidekiq.log 2>&1'