Long Cheng kevinclcn

Install docker on Ubuntu 14.04

$ curl -sSL https://get.docker.com/ubuntu/ | sudo sh

source

Set http proxy for docker

局部变量，实例变量，self都是绑定在对象上的名字，我们简称为绑定(binding)。所有绑定都有一个寄居场所，我们称为作用域(scope)。假设你是一个调试器，你时刻都处于一个作用域中，上下左右都是绑定: 局部变量，实例变量，全局变量，常亮，还有当前对象self。只有当你遇到三个关键字时，才会进入一个新作用域。

这三个改变作用域的关键字，分别是module,class和def。我们称为作用域的门(scope gate)。

在Java等其他语言里，一个作用域内可以看到外围作用域内的变量，但Ruby不同，一个作用域内只能看到当前作用域内的变量。也就是说，变量不能跨作用域查找。

比如：

Global variable

全局变量以$开头，它是全局可见的。Ruby内建的全局变量如$:和$LOAD_PATH表示require读取文件时寻找的目录数组。

Class variable

类变量以@@开头，可被定义它的类以及其子类访问，也可被定义它的类和子类的实例访问。

class Example
 @@cls_var = "defined in Example"

mkdir -p /usr/local/etc/nginx/sites-{enabled,available}

File locations:

nginx.conf to /usr/local/etc/nginx/
default and default-ssl to /usr/local/etc/nginx/sites-available
homebrew.mxcl.nginx.plist to /Library/LaunchDaemons/

Introduction

An introduction to curl using GitHub's API

The Basics

Makes a basic GET request to the specifed URI

curl https://api.github.com/users/caspyin

	FROM ubuntu:14.04

	MAINTAINER kevinclcn@gmail.com

	ENV https_proxy <https proxy>
	ENV http_proxy <http proxy>
	ENV LANG en_US.UTF-8

	RUN apt-get -qy install git curl
	RUN gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 && curl -sSL https://get.rvm.io \| bash -s stable

	# How to find out where a method comes from.
	# Learned this from Dave Thomas while teaching Advanced Ruby Studio
	# Makes the case for separating method definitions into
	# modules, especially when enhancing built-in classes.
	module Perpetrator
	def crime
	end
	end

	class Fixnum

	import com.google.common.cache.CacheBuilder;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;
	import org.springframework.cache.CacheManager;
	import org.springframework.cache.annotation.CachingConfigurer;
	import org.springframework.cache.annotation.EnableCaching;
	import org.springframework.cache.guava.GuavaCache;
	import org.springframework.cache.interceptor.CacheErrorHandler;
	import org.springframework.cache.interceptor.CacheResolver;
	import org.springframework.cache.interceptor.KeyGenerator;

	import com.google.common.cache.CacheBuilder;
	import org.springframework.cache.Cache;
	import org.springframework.cache.annotation.EnableCaching;
	import org.springframework.cache.guava.GuavaCache;
	import org.springframework.context.annotation.Bean;
	import org.springframework.context.annotation.Configuration;

	import java.util.concurrent.TimeUnit;

	@Configuration

	include Rails.application.routes.url_helpers
	default_url_options[:host] = "localhost"