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@justinweiss
justinweiss / settings.rb
Created May 27, 2014 16:54
Simple settings for Rails
require 'yaml'
require 'erb'
require 'ostruct'
class Settings < OpenStruct
# Settings.new(:google_analytics)
def initialize(config_file_base_name)
super(YAML.load(ERB.new(File.read(Rails.root.join("config", "#{config_file_base_name}.yml"))).result)[Rails.env])
end
@simX
simX / hidpi.txt
Created July 28, 2012 04:58
Enable HiDPI mode in Mountain Lion w/o Quartz Debug
sudo defaults write /Library/Preferences/com.apple.windowserver DisplayResolutionEnabled -bool YES;
sudo defaults delete /Library/Preferences/com.apple.windowserver DisplayResolutionDisabled;
// by the way, you need to logout and log back in for this to take effect. Or at least that's what
// Quartz Debug says. Who knows, maybe it's lying?
// P.S. Go to [Apple menu --> System Preferences --> Displays --> Display --> Scaled] after logging
// back in, and you'll see a bunch of "HiDPI" resolutions in the list to choose from.
@jboner
jboner / latency.txt
Last active April 25, 2024 01:18
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@dnagir
dnagir / rspec-syntax-cheat-sheet.rb
Created November 5, 2010 09:29
RSpec 2 syntax cheat sheet by example
# RSpec 2.0 syntax Cheet Sheet by http://ApproachE.com
# defining spec within a module will automatically pick Player::MovieList as a 'subject' (see below)
module Player
describe MovieList, "with optional description" do
it "is pending example, so that you can write ones quickly"
it "is already working example that we want to suspend from failing temporarily" do
pending("working on another feature that temporarily breaks this one")