bachue

require 'v8'

v8 = V8::Context.new
r = v8.eval 'a = {"b": 310399688698392577}'
r[b].to_i # => 310399688698392576 (expected: 310399688698392577)

bachue

require 'tsort'
require 'pp'

Node = Struct.new :value, :before, :after

class Collection < Array
  include TSort

  alias :tsort_each_node :each
  def tsort_each_child(current, &block)

bachue

def Object.superclasses
  superclasses = superclass.superclasses if superclass.respond_to?(:superclasses)
  superclasses ||= []
  superclasses.unshift self
end

bachue

class A
  class << self
    def add(ele)
      @array ||= []
      @array << ele
    end

    def array
      @array ||= []
    end

bachue

jobs_per_process = 100
process_count = 10

User.find_in_batches(:batch_size => jobs_per_process * process_count, :conditions => "name like '%00'") do |group|
  batches = group.in_groups(process_count)
  batches.each do |batch|
    Process.fork do
      ActiveRecord::Base.establish_connection
      batch.reject { |user| user.nil? }.
        each {|user| puts user.name }

bachue

class A
  def f() 'A#f' end
end

module M
  def f() 'M#f' end
  def g() 'M#g' end
  def k() 'M#k' end
end

bachue

def run_filters(&blk)
  m = Module.new do
    extend self
    @__filter_endpoint = blk
  end
  code = '@__filter_endpoint.call'
  filter_methods = private_methods.grep(/^filter_/)
  filter_methods.each do |meth|
    m.send(:define_method, "__filter_#{meth}", method(meth))
  end

bachue

Errno::ENOSYS: Function not implemented
Errno::EDESTADDRREQ: Destination address required
Errno::ESHUTDOWN: Can't send after socket shutdown
Errno::ENODEV: Operation not supported by device
Errno::ENOMEM: Cannot allocate memory
Errno::EMLINK: Too many links
Errno::EPROTO: Protocol error
Errno::ENETUNREACH: Network is unreachable
Errno::EIO: Input/output error
Errno::EMFILE: Too many open files

bachue

Talks in English

• Shrink to Grow(Daniel Bovensiepen)
  • ustream
• Identical Production, Staging and Development Environments Using Chef, AWS and Vagrant(Christopher Rigor)
  • ustream ustream(part2)
• Fewer Constraints, More Concurrency.(Ryan Smith)
  • ustream
• Webruby: Now you can write your favorite Ruby code for the browser!(Xuejie "Rafael" Xiao)
  • ustream
• Contributing to Ruby(Zachary Scott)

bachue

From: /Users/zhour6/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/webrick/httputils.rb @ line 444 WEBrick::HTTPUtils._escape:

    440: def _escape(str, regex)
    441:   begin
    442:     str.gsub(regex){ "%%%02X" % $1.ord }
    443:   rescue Exception
 => 444:     require 'pry'; binding.pry
    445:   end
    446: end