dchentech

# http://www.justskins.com/forums/format-number-with-comma-37369.html

n.to_s.reverse.gsub(/...(?=.)/,'\&,').reverse

dchentech

Mongoid.configure do |config| 
  config.master = Mongo::Connection.new(ENV['MONGOID_HOST'], ENV['MONGOID_PORT'], :logger => Rails.logger).db(ENV['MONGOID_DATABASE'])
end

dchentech

第一次在ruby客户端中途取消，第二次就华丽丽的down掉了


                248300/1548508  16%
Tue Nov  8 17:59:10 Invalid access at address: 0x2aabdf7dbe24

Tue Nov  8 17:59:10 Got signal: 7 (Bus error).

Tue Nov  8 17:59:11 Backtrace:
0x8ad399 0x8ad970 0x3dc6a0eb10 0x7345f8 0x77b264 0x682625 0x6876e9 0x688b7f 0x689101 0x689370 0x688fed 0x689370 0x688fed 0x689370 0x688fed 0x689370 0x688fed 0x689370 0x688fed 0x689370 

dchentech

Started GET "/assets/application.css" for 127.0.0.1 at Tue Jan 17 15:26:06 +0800 2012
Served asset /application.css - 200 OK (42ms)
[2012-01-17 15:26:06] ERROR NoMethodError: undefined method `each' for nil:NilClass
	/usr/local/rvm/gems/ree-1.8.7-2011.03/gems/rack-1.3.6/lib/rack/handler/webrick.rb:71:in `service'
	/usr/local/rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
	/usr/local/rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
	/usr/local/rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
	/usr/local/rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:162:in `start'
	/usr/local/rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
	/usr/local/rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:95:in `start'

dchentech

错误信息：Database command 'mapreduce' failed: (assertion: 'unknown out specifier [db]'; assertionCode: '13522'; errmsg: 'db assertion failure'; ok: '0.0').

解决方案：设置out现象里的db参数应该是一个字符串键，比如{"db" => "mapreduce_db", :replace => "tmp_mapreduce"}

dchentech

DateTime.strptime("08/Mar/2012:11:53:53 +0800", "%d/%b/%Y:%H:%M:%S %z")
# => Thu, 08 Mar 2012 11:53:53 +0800 

dchentech

Mon Mar 26 06:23:21 [FileAllocator] allocating new datafile /dbs/mongodb/local.72, filling with zeroes...
Mon Mar 26 06:23:45 [FileAllocator] done allocating datafile /dbs/mongodb/local.72, size: 2047MB,  took 23.744 secs
Mon Mar 26 06:23:45 [FileAllocator] allocating new datafile /dbs/mongodb/local.73, filling with zeroes...
Mon Mar 26 06:24:05 [FileAllocator] done allocating datafile /dbs/mongodb/local.73, size: 2047MB,  took 20.625 secs
Mon Mar 26 06:24:05 [FileAllocator] allocating new datafile /dbs/mongodb/local.74, filling with zeroes...
Mon Mar 26 06:24:32 [FileAllocator] done allocating datafile /dbs/mongodb/local.74, size: 2047MB,  took 26.592 secs
Mon Mar 26 06:24:32 [FileAllocator] allocating new datafile /dbs/mongodb/local.75, filling with zeroes...
Mon Mar 26 06:25:02 [FileAllocator] done allocating datafile /dbs/mongodb/local.75, size: 2047MB,  took 29.55 secs
Mon Mar 26 06:25:02 [FileAllocator] allocating new datafile /dbs/mongodb/local.76, filling with zeroes...
Mon Mar 26 06:25:21 [FileAlloca

dchentech

%w[open-uri nokogiri].map &method(:require)
@regexp = Regexp.new ENV['租房']
(0..19).to_a.map do |n|
  html = Nokogiri open("http://www.douban.com/group/beijingzufang/discussion?start=#{n*25}")
  html.css(".article table.olt tr td a").map {|i| {:title => i.attributes['title'].to_s, :href => i.attributes['href'].to_s}}.map do |h|
    if h[:title].match @regexp
      puts h.inspect
      h[:href]
    end
  end

dchentech

require 'rubygems'
require 'inline'

class ParseLogInC
  inline do |builder|
    builder.c <<-CODE
      #include 'ruby.h'
      #include 'stdio.h'
      static VALUE nginx(VALUE line) {
        VALUE ary = rb_ary_new();

dchentech

require 'rubygems'
require 'rack'

class Object
  def webapp
    class << self
       define_method :call do |env|
         func, *attrs = env['PATH_INFO'].split('/').reject(&:empty?)
         [200, {}, send(func, *attrs)]
       end