zhangyaning u2

## Hacker_News_Ranking_Algorithm
-- (p - 1) / (t + 2)^1.5
CREATE FUNCTION SP_POINTS(P SMALLINT(5), CREATED TIMESTAMP)
 RETURNS TINYINT(3)
	RETURN (P - 1) / POW(TIMESTAMPDIFF(HOUR, CREATED, NOW()) + 2, 1.5);

## application.js
//= require jquery
//= require jquery_ujs

$(function() {
  var source = new EventSource('/stream');
  source.addEventListener('counter', function(e) {
    $('body').after(e.data + '<br />');
  });
});

## iterator.rb
module EventMachine
  # A simple iterator for concurrent asynchronous work.
  #
  # Unlike ruby's built-in iterators, the end of the current iteration cycle is signaled manually,
  # instead of happening automatically after the yielded block finishes executing. For example:
  #
  #  (0..10).each{ |num| }
  #
  # becomes:
  #

## jaccard_recommendation.rb
#!/usr/bin/env ruby

# Please read http://otobrglez.opalab.com for more information about this code.

class Book < Struct.new(:title)

  def words
    @words ||= self.title.gsub(/[a-zA-Z]{3,}/).map(&:downcase).uniq.sort
  end

## Changes in Rails 4_1.md

      
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                u2
                / Changes in Rails 4_1.md
            
            
              Created
              April 24, 2014 08:38
                — forked from nightire/Changes in Rails 4_1.md
            
          
    Routes

小心地使用 Match（Rails 3 已实现）

Rails 3 提供了 match 方法供我们自定义 routes，然而我们要小心使用它以避免“跨站脚本攻击”（XSS Attack）。比如像这样的 routes：
注：（r3 代表 Rails 3，r4 代表 Rails 4）
# routes.rb

  
## nav-list.less
.nav-list {
  padding-left: 15px;
  padding-right: 15px;
  margin-bottom: 0;
}

.nav-list > li > a,
.nav-list .nav-header {
  margin-left: -15px;
  margin-right: -15px;

## api.rb
module Todo
  class API < Grape::API
    use Rack::Session::Cookie
    version 'v1', :format => :json

    helpers do
      def current_user
        return nil if env['rack.session'][:user_id].nil?
        @current_user ||= User.get(env['rack.session'][:user_id])
      end

## test_helper.rb
ENV['RACK_ENV'] = 'test'

require 'bundler/setup'
require 'test/unit'
gem 'minitest'
require 'timecop'

require 'grape'
require 'logger'
Grape::API.logger = Logger.new('/dev/null')

## redis-server-for-init.d-startup
#! /bin/sh
### BEGIN INIT INFO
# Provides:		redis-server
# Required-Start:	$syslog
# Required-Stop:	$syslog
# Should-Start:		$local_fs
# Should-Stop:		$local_fs
# Default-Start:	2 3 4 5
# Default-Stop:		0 1 6
# Short-Description:	redis-server - Persistent key-value db

## eventmachine_fiber.rb
#!/usr/bin/env ruby
# -*- coding: utf-8 -*-

# 有关 Fiber 的解释: (按照数据流的方向分为两部分)

# 在 `主线程' 中使用 resume 方法来启动(或继续执行)一个 `纤程'.
# 1. 第一次调用 fiber.resume, 会启动一个纤程,
#    如果 resume 调用时提供了实参, 会作为代码块形参传入代码块.
# 2. 如果非第一次调用 fiber.resume, 即, `恢复' 一个纤程, 会做两件事:
#    - 从上次离开纤程的那个位置(调用 Fiber.yield 离开纤程的那个位置), 恢复纤程的执行.
	-- (p - 1) / (t + 2)^1.5
	CREATE FUNCTION SP_POINTS(P SMALLINT(5), CREATED TIMESTAMP)
	RETURNS TINYINT(3)
	RETURN (P - 1) / POW(TIMESTAMPDIFF(HOUR, CREATED, NOW()) + 2, 1.5);
	//= require jquery
	//= require jquery_ujs

	$(function() {
	var source = new EventSource('/stream');
	source.addEventListener('counter', function(e) {
	$('body').after(e.data + '<br />');
	});
	});
	module EventMachine
	# A simple iterator for concurrent asynchronous work.
	#
	# Unlike ruby's built-in iterators, the end of the current iteration cycle is signaled manually,
	# instead of happening automatically after the yielded block finishes executing. For example:
	#
	# (0..10).each{ \|num\| }
	#
	# becomes:
	#
	#!/usr/bin/env ruby

	# Please read http://otobrglez.opalab.com for more information about this code.

	class Book < Struct.new(:title)

	def words
	@words \|\|= self.title.gsub(/[a-zA-Z]{3,}/).map(&:downcase).uniq.sort
	end
	module Todo
	class API < Grape::API
	use Rack::Session::Cookie
	version 'v1', :format => :json

	helpers do
	def current_user
	return nil if env['rack.session'][:user_id].nil?
	@current_user \|\|= User.get(env['rack.session'][:user_id])
	end
	ENV['RACK_ENV'] = 'test'

	require 'bundler/setup'
	require 'test/unit'
	gem 'minitest'
	require 'timecop'

	require 'grape'
	require 'logger'
	Grape::API.logger = Logger.new('/dev/null')
	#! /bin/sh
	### BEGIN INIT INFO
	# Provides: redis-server
	# Required-Start: $syslog
	# Required-Stop: $syslog
	# Should-Start: $local_fs
	# Should-Stop: $local_fs
	# Default-Start: 2 3 4 5
	# Default-Stop: 0 1 6
	# Short-Description: redis-server - Persistent key-value db
	#!/usr/bin/env ruby
	# -- coding: utf-8 --

	# 有关 Fiber 的解释: (按照数据流的方向分为两部分)

	# 在 `主线程' 中使用 resume 方法来启动(或继续执行)一个 `纤程'.
	# 1. 第一次调用 fiber.resume, 会启动一个纤程,
	# 如果 resume 调用时提供了实参, 会作为代码块形参传入代码块.
	# 2. 如果非第一次调用 fiber.resume, 即, `恢复' 一个纤程, 会做两件事:
	# - 从上次离开纤程的那个位置(调用 Fiber.yield 离开纤程的那个位置), 恢复纤程的执行.