rkh

# http://yehudakatz.com/2010/02/21/ruby-is-not-a-callable-oriented-language/

module DoAsYouPlease
  Object.send :include, self
  def method_missing(name, *args, &block)
    self.class.const_get(name).call(*args, &block)
  end
end

Foo = proc { 42 }

dhh

# autoload concerns
module YourApp
  class Application < Rails::Application
    config.autoload_paths += %W(
      #{config.root}/app/controllers/concerns
      #{config.root}/app/models/concerns
    )
  end
end

nicholasjhenry

## PayRoll gem

# lib/pay_roll.rb
module PayRoll
  class << self
    attr_accessor :employee_directory
      def config
        yield self
      end
    end

tomstuart

>> IF = -> b { b }
=> #<Proc:0x007fb4e4049cc8 (lambda)>

>> LEFT = -> p { p[-> x { -> y { x } } ] }
=> #<Proc:0x007fb4e403d680 (lambda)>

>> RIGHT = -> p { p[-> x { -> y { y } } ] }
=> #<Proc:0x007fb4e4028ff0 (lambda)>

>> IS_EMPTY = LEFT

christophermanning

Created by Christopher Manning

Summary

Nodes are linked to nodes in neighboring cells. The cell's color is a function of its area.

The white lines are the Delaunay triangulation and the purple cells are the Voronoi diagram.

Controls

krisleech

hide do          
          _     _     _            
    /\  /(_) __| | __| | ___ _ __  
   / /_/ / |/ _` |/ _` |/ _ \ '_ \ 
  / __  /| | (_| | (_| |  __/ | | |
  \/ /_/ |_|\__,_|\__,_|\___|_| |_|
end

JanKoszewski

Chapter 1:

Summary

• nerds are unpopular in high school, not because they don't want to be, but because they care more about being smart and pursuing higher intellectual goals than being popular.

What Stood Out

• school is equivalently a prison, or at the tamest, a holding center for young kids
• teenagers/children are cruel by nature

mshafrir

{
    "AL": "Alabama",
    "AK": "Alaska",
    "AS": "American Samoa",
    "AZ": "Arizona",
    "AR": "Arkansas",
    "CA": "California",
    "CO": "Colorado",
    "CT": "Connecticut",
    "DE": "Delaware",

kellyredding

require 'net/imap'

# Net::IMAP raises a parse error exception when fetching attributes it doesn't
# recognize.  Here I patch an instance of Net::IMAP's `msg_att` method to
# recognize the Gmail IMAP extended attributes

# Refer to:
# * https://developers.google.com/google-apps/gmail/imap_extensions#access_to_gmail_labels_x-gm-labels
# * http://blog.wojt.eu/post/13496746332/retrieving-gmail-thread-ids-with-ruby

jboner

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