dbrady

# What is existence?

class Be
  def initialize
  end

  def matches?(actual)
    defined? actual
  end

dbrady

dbrady@robomonkey:~/lmp/market (sprint)$ ruby -e 'require "rubygems"; require "trollop"; puts Trollop.class'
Module
dbrady@robomonkey:~/lmp/market (sprint)$ ruby -e 'require "rubygems"; require "nokogiri"; puts Nokogiri.class'
Module
dbrady@robomonkey:~/lmp/market (sprint)$ cd
dbrady@robomonkey:~ $ ruby -e 'require "rubygems"; require "trollop"; puts Trollop.class'
Module
dbrady@robomonkey:~ $ ruby -e 'require "rubygems"; require "nokogiri"; puts Nokogiri.class'
./nokogiri.rb:4: uninitialized constant Nokogiri (NameError)
        from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require'

dbrady

require 'rubygems'
require 'nokogiri'

doc = Nokogiri::HTML.parse(<<-eohtml)
    <table>
      <tr><td>9</td><td>MRobinson</td></tr>
      <tr><td>10</td><td>RGoldblatt</td></tr>
      <tr><td>11</td><td>JBrancato</td></tr>
      <tr><td>XX</td><td><table><tr><td>Poo</td></tr></table></td></tr>
    </table>

dbrady

>> class String
>>   alias :/ :split
>>   end
=> nil
>> "foo"///
=> ["f", "o", "o"]

dbrady

$ cat bin/localhost 
#!/bin/sh
open http://localhost/$*

dbrady

    # This takes about 2s for a 53Mb file.
    bytes = audio_file.read_into(audio_buffer)

    # This takes less than a second, BUT the data is interleaved
    # (left, right, left, right, left, right, etc)
    self.audio_data = audio_buffer.unpack('s*')
    
    # Less than a second.
    self.left_channel = NArray.float(2, audio_data.size)
    self.right_channel = NArray.float(2, audio_data.size)

dbrady

describe "Server" do
  describe "methods" do

    let(:put) { "put foobar beans 5\nhowdy" }

    it "should be valid for a valid put method" do
      # before all
      @pid = spawn("bin/server")
      # before each
      @sock = TCPSocket.new "127.0.0.1", 3000

dbrady

# One pattern I use so much I need to make an editor macro for it:

class Foo
  attr_accessor :x, :y, :z, :w

  # --> macro on above line should produce:
  def initialize(x, y, z, w)
    @x, @y, @z, @w = x, y, z, w
  end
  # --> end macro

dbrady

# Coders from from C often like this style:
log status == OK ? "OK" : "PROBLEM"
log "All done."

# But since if returns a value in ruby, you can spell it out:
log if status == OK
  "OK"
else
  "PROBLEM"
end

dbrady

// Consider the humble object:
var dave = {
  name: "Dave",
  age: 39,
  color: "green"
};

// If I add to this and forget to add another trailing comma, it's a
// syntax error:
var dave = {