myronmarston

require 'erb'
require 'benchmark'

TEMPLATE = "<b><%= name %></b> in <%= city %>, <%= state_id %>"
LOCALS = { :name => 'Wes', :city => 'Seattle', :state_id => 'WA' }

def render_with_plain_erb
  local_variables = Struct.new(*LOCALS.keys).new(*LOCALS.values)
  ERB.new(TEMPLATE).result(local_variables.instance_eval { binding })
end

myronmarston

ruby-1.8.7-p299 ➜  code  ruby webmock_patron_body_stubbing_test.rb 
Loaded suite webmock_patron_body_stubbing_test
Started
...F
Finished in 0.024057 seconds.

  1) Failure:
test_patron(BodyStubbingTest) [webmock_patron_body_stubbing_test.rb:44]:
<"response for foo body"> expected but was
<"response for nil body">.

myronmarston

require 'rubygems'
require 'rspec'

shared_examples_for :a_foo do |supported_features|
  it 'responds to #to_s' do
    subject.should respond_to(:to_s)
  end

  it 'responds to #bar' do
    subject.should respond_to(:bar)

myronmarston

ruby-1.8.6-p399 ➜ rvm use 1.8.6

info: Using ruby 1.8.6 p399
ruby-1.8.6-p399 ➜ ruby rspec_constant_spec.rb
.

Finished in 0.00083 seconds
1 example, 0 failures
ruby-1.8.6-p399 ➜ rvm use 1.8.7

myronmarston

require 'benchmark'

n1, n2 = 100, 1000
Benchmark.benchmark do |b|
  b.report("<<") do
    hash = Hash.new { |h, k| h[k] = [] }
    n1.times do |i|
      n2.times do |i2|
        hash[i] << i2
      end

myronmarston

require 'parka'

# The DSL used in the gemsets block will cause Parka to dynamically generate a bunch of rake tasks:
#   rake parka:ar_238:install         => generates a Gemfile using the ar_238 gemset, and runs `bundle install` against it
#   rake parka:ar_238:update          => runs a `bundle update` against the ar_238 gemset
#   rake parka:ar_238:update GEM=foo  => runs a `bundle update foo` against the ar_238 gemset
#   rake parka:all:install            => generates a Gemfile for all gemsets, and runs `bundle install` against each
#
#   rake parka:ar_238:spec            => run the spec task using the current ruby interpreter and the ar_238 gemset
#   rake parka:ar_235:spec            => run the spec task using the current ruby interpreter and the ar_238 gemset

myronmarston

➜  code  rvm use 1.8.7                    

info: Using ruby 1.8.7 p302
ruby-1.8.7-p302 ➜  code  rvm gemset create rspec_187_error

info: Gemset 'rspec_187_error' created.
ruby-1.8.7-p302 ➜  code  rvm gemset use rspec_187_error   

info: Now using gemset 'rspec_187_error'
ruby-1.8.7-p302@rspec_187_error ➜  code  gem install rspec --pre --no-rdoc --no-ri

myronmarston

>> Routes.user_path(7)
=> "/users/7"
>> Routes.user_url(7)
=> "http://www.some-domain.com/users/7"

myronmarston

$ ruby private_class_method.rb 
7
private_class_method.rb:13: private method `bar' called for Foo:Class (NoMethodError)

myronmarston

require 'benchmark'

class MyStruct < Struct.new(:a); end

class MyStructHolder
  def get_via_instance_variable
    @my_struct ||= MyStruct.new(self)
  end

  @@hash = Hash.new do |hash, key|