etng

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

Intro

Talks in English

First create a Vagrantfile:

vagrant init precise64

Then add the following to the new Vagrantfile:

config.vm.provision :shell, :inline => <<-EOT

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

善用 `define_method`

define_method 可以帮助我们动态的，快速的定义多个方法；比如有这样一个类：

class Post
  attr_accessor :title, :content, :state

  def initialize(title, content, state = :draft)
    @title, @content, @state = title, content, state

	# -- coding: utf-8 --

	from hashlib import md5
	from urllib import urlencode

	#网关
	GATEWAY = 'http://wappaygw.alipay.com/service/rest.htm'

	class Alipay(object):
	'支付宝移动服务网关'

	net.core.wmem_max = 12582912
	net.core.rmem_max = 12582912
	net.ipv4.tcp_rmem = 10240 87380 12582912
	net.ipv4.tcp_wmem = 10240 87380 12582912
	net.ipv4.ip_local_port_range = 18000 65535
	net.ipv4.netfilter.ip_conntrack_tcp_timeout_time_wait = 1
	net.ipv4.tcp_window_scaling = 1
	net.ipv4.tcp_max_syn_backlog = 3240000
	net.core.somaxconn = 3240000
	net.ipv4.tcp_max_tw_buckets = 1440000

	# inspired by
	# Master NGINX - Dimitri Aivaliotis
	# http://www.amazon.com/Mastering-NGINX-Dimitri-Aivaliotis-ebook/dp/B00B90PJR4
	# Chapter 8 - Switching binaries at runtime

	# We get the pid of the 'to be replaced' nginx master process
	export nginx_old_pid=`cat /var/run/nginx.pid`

	# we send an USR2 signal to tell 'to be replaced' process
	# to start a new master process.

	" copy all this into a vim buffer, save it, then...
	" source the file by typing :so %
	" Now the vim buffer acts like a specialized application for mastering vim

	" There are two queues, Study and Known. Depending how confident you feel
	" about the item you are currently learning, you can move it down several
	" positions, all the way to the end of the Study queue, or to the Known
	" queue.

	" type ,, (that's comma comma)