dchentech

pre {
  white-space: pre; /* fix bootstrap conflict with pygments */
}

/* 代码框自动下滑到底部(footer)的原因是table标签未关闭，见: https://github.com/mvj3/pygments.rb/commit/e7ad93a8db7a4b6be94e8fc03661b88797c903e8#lib/pygments/popen.rb */

dchentech

系统默认的Python是2.4.3, 使用时报MentosError: Failed to get header错误。

看了下官方文档, pygments.rb需要2.5以上, 因此选择了和ruby的rvm类似的可以管理多版本python的https://github.com/utahta/pythonbrew。

运行默认推荐的 curl -kL http://xrl.us/pythonbrewinstall | bash , 终端提示如下错误:
$ CURLOPT_SSL_VERIFYPEER=false curl -kL http://xrl.us/pythonbrewinstall | bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   229  100   229    0     0    299      0 --:--:-- --:--:-- --:--:--     0
curl: (60) SSL certificate problem, verify that the CA cert is OK. Details:

dchentech

ActiveRecord::Base.establish_connection(YAML.load_file('./config/database.yml')['production'])

ActiveRecord::Base.connection.execute("show tables;").to_a.flatten.map do |table_name|
  eval "class #{table_name.camelcase} < ActiveRecord::Base; self.table_name = :#{table_name}; end"
end

dchentech

预备知识：如果对条件选择做索引的话，sphinx采用的数据结构均为非字符类型，碰到字符字段，在ThinkingSphinx都被默认经CRC32转换成标识唯一整数。
解决过程：ThinkingSphinx需要对表名做一个CRC32转化，具体在lib/thinking_sphinx/source/sql.rb的crc_column方法。该方法里为了对继承表进行兼容，里面会判断Rails里约定的inheritance_column是否也在表字段里（代码为 @model.column_names.include?(@model.inheritance_column)），如果有就把type字段也作为CRC32的参数。可是如果type为整数类型，那么它没有to_crc32方法，所以就报了undefined method `to_crc32' for 1:Fixnum 错误。
解决方案：给有整数type字段的model加一句 self.inheritance_column = :_type

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

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

%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

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

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

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"}