dchentech’s gists

dchentech / assets.error

Created January 17, 2012 07:37

assets/application.css"

	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 / mongod.log

Created November 8, 2011 10:19

在mongodb上重建一个百万级数据量的索引就把进程给搞挂了

	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 / mongoid_logger.rb

Created October 27, 2011 02:07

Logging mongoid into Rails.logger

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

dchentech / format_big_number_with_comma.rb

Created October 14, 2011 09:33

逗号分割大整数

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

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

dchentech / n1.rb

Created October 4, 2011 12:15

1、11、111、1111、……的平方

	# http://www.bjt.name/2011/06/beautiful-math-triangle-r/
	proc do \|line\|
	(1..line).each do \|num\|
	puts "#{' '(line - num)}#{('1'num).to_i**2}"
	end
	end.call((ARGV[0] \|\| 36).to_i)

dchentech / sphinx.yml

Created September 20, 2011 09:47

sphinx in chinese setup

	production:
	listen: 0.0.0.0:9312
	address: 0.0.0.0 # 对应的安装了searchd(sphinx)的mysql服务器ip
	port: 9312 # 对应的安装了searchd(sphinx)的mysql服务器端口
	bin_path: '/usr/local/bin'
	searchd_file_path: '/data/sphinx/production'
	query_log_file: '/data/sphinx/log/searchd.query.log'
	searchd_log_file: '/data/sphinx/log/searchd.log'
	exceptions: '/data/sphinx/log//exception.log'
	enable_star: true # 支持通配符匹配

dchentech / action.xml.nokogiri

Created June 2, 2011 08:50 — forked from raecoo/action.xml.nokogiri

xml builder by Nokogiri

	xml.feed(:xmlns => "http://www.w3.org/2005/Atom") { \|feed\|
	feed.title("#{user.name}'s Private Notification Feed")
	feed.link(:href => "http://#{account.subdomain}.domain.com/feeds/#{user.email_alias}.xml", :rel => "self")
	feed.link(:href => "http://#{account.subdomain}.domain.com")
	}

dchentech / select_lucky_phone_num.rb

Created April 26, 2011 14:31

京东购iphone选号，需求如代码所示

File.read('number.txt').split("\n").select {|str| (str[4] == str[6]) && (str[8] == str[10]) }.reject {|str| str.match(/4/) }.map(&:strip)

dchentech / if_rescure.rb

Created March 24, 2011 09:48

benchmark between if and rescue

dchentech / .gitignore

Last active September 25, 2015 01:57

二分查找

binary_search.rbc

	# http://www.bjt.name/2011/06/beautiful-math-triangle-r/
	proc do \|line\|
	(1..line).each do \|num\|
	puts "#{' '(line - num)}#{('1'num).to_i**2}"
	end
	end.call((ARGV[0] \|\| 36).to_i)

David Chen dchentech