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李雷和韩梅梅，他俩暗恋没有？交往没有？分手没有？在似乎有着漫长时光的青春岁月，每个曾捧着初中英语书的同学，白日无聊，也许都做过这样那样天马行空的想象。据统计，从1990年到2000年，写有“李雷和韩梅梅”故事的初中英语教科书，教育了整整一亿人。
那么，抛开现在各种以李雷和韩梅梅为原型的歌曲、话剧、漫画、微电影、改编故事不提，你想不想听听李雷和韩梅梅的官方“八卦”？聊聊这套传奇教材背后的故事？
机会来了。日前，在“中国百年教科书整理与研究”项目成果发布，微信公众号“人民日报政文”的小编亲自探查，揭开了李雷和韩梅梅的“身世之谜”。
“划时代”的教科书 Continue reading “李雷和韩梅梅身世之谜揭晓”
How to Access Arguments
To access command-line arguments used when starting a script use the automatic variable $args. You can cycle through the individual arguments in the $args collection by using code similar to this:
foreach ($i in $args) {$i}
To access a particular argument use the collection index number, with 0 representing the first item in the collection, 1 representing the second item, etc:
$args[0]
You can reference the last item in a collection by using the index number –1:
$args[-1]
How to Use Colored Text
To display text in a different color use the Write-Host cmdlet and specify a foreground color:
How to Get More Information
You can also specify a different background color: Continue reading “Windows PowerShell Quick Reference”
共享我的当前VPS中关于nginx的一些设置，防止自己忘记了。
针对Nginx global的设置（没有写的，说明使用了默认的设置了）：
#Nginx进程的用户名和用户组设置，最小权限原则 user www-data www-data; #Nginx初始化工作进程数 worker_processes 4; #启用Nginx的核心安全策略，比如SQL注入，跨站之类 include /etc/nginx/naxsi_core.rules; #启用gzip压缩输出，对IE6禁用gzip gzip on; gzip_disable "msie6";
针对Virtaul Host的设置：
首先看Reserve Proxy，
server {
### server port and name ###
listen 443;
ssl on;
server_name ******.zhuoyue.me
### SSL log files ###
access_log /var/log/nginx/ssl-access.log;
error_log /var/log/nginx/ssl-error.log;
### SSL cert files ###
ssl_certificate /home/niyouzhu/nginxssl/server.crt;
ssl_certificate_key /home/niyouzhu/nginxssl/server.key;
### Add SSL specific settings here ###
ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers RC4:HIGH:!aNULL:!MD5;
ssl_prefer_server_ciphers on;
keepalive_timeout 60;
ssl_session_cache shared:SSL:10m;
ssl_session_timeout 10m;
### We want full access to SSL via backend ###
location / {
proxy_pass https://localhost:4200;
### force timeouts if one of backend is died ##
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
### Set headers ####
proxy_set_header Accept-Encoding "";
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
### Most PHP, Python, Rails, Java App can use this header ###
#proxy_set_header X-Forwarded-Proto https;##
proxy_set_header X-Forwarded-Proto $scheme;
add_header Front-End-Https on;
proxy_redirect off;
}
}
上面关于SSL自签名证书的创建，可以看我的另一篇文章：Ubuntu+LAMP+Nginx
再来看一般的Virtual Host设置， Continue reading “Nginx virtual host & php-fpm settings”
在美国，转基因作物最早问世于1996年，随后迅速被广泛接受。2013年，从种植面积来看，美国至少95%的甜菜，93%的大豆，90%的棉花和玉米均为转基因品种，这一数据来自美国农业部国家农业统计局。
2015年11月19日，经过全面的科学论证，美国食品与药品监督管理局（FDA）批准了世界上第一种食用转基因动物——AquAdvantage转基因大西洋鲑鱼（Atlantic salmon），俗称三文鱼。这种转基因三文鱼生长速度约为普通三文鱼的两倍，可节省75%的饲料成本。
转基因三文鱼最早于问世1989年，来自于美国加州大学伯克利分校开发的抗冻蛋白（antifreeze protein）技术。A / F Protein公司最初成立于1991年。1993年该公司向FDA寻求监管指导，1995年开始申请商业化。
1996年，A/F Protein公司从多伦多大学（University of Toronto）和纽芬兰纪念大学（Memorial University of Newfoundland）获得了AquAdvantage技术许可，随后于2000年重组成为两个独立的实体公司：A/F Protein公司，保留了抗冻蛋白技术；AquaBounty Farm公司，获得了AquAdvantage技术。AquaBounty Farm公司的总部设在马萨诸塞州沃尔瑟姆2004年更名为AquaBounty Technologies。 Continue reading “20年后的今天，世界首个转基因动物开始供人类食用”
相信很多人没有看到过，我也是偶尔看到的，觉得讲的挺好的，很让人激动，正能量。
祝福祖国越来越美好。 Continue reading “《走向共和》最后一集中孙文的演讲”
因为一些众所周知的原因，一直打算将服务器放到国外，周末的时候逛了国外的一些VPS服务商，选定了一款。原本服务器上的资料有7G多，包括一些站点和个人文档，当然也包括这个blog，这两天下班回到家后就SSH到VPS上折腾，现在终于算基本完善了，下面列出一些目前提供的服务。
VPN，国外的VPS当然第一件事就是架一个VPN，这样就可以自由FAN墙啦。VPN Service使用的是Pritunl。
因为公司的网络只提供80端口对外，无法在公司连到VPS，于是在VPS上提供了一个web-based ssh，使用的是shellinabox。
然后搭建了必须的3个服务：Apache2, MySqL, Php
Apache提供了Proxy reverse服务，以提供对Pritunl, shellinabox的代理访问
防火墙使用的是ufw.
[2015/12/1] Apache的并发性能不如nginx, 所以今天把apache换成了nginx，apache下的 url rewrite rule 很多不能在nginx下用，重写了一些url rewrite规则。
Markdown 的目标是实现「易读易写」。
可读性，无论如何，都是最重要的。一份使用 Markdown 格式撰写的文件应该可以直接以纯文本发布，并且看起来不会像是由许多标签或是格式指令所构成。Markdown 语法受到一些既有 text-to-HTML 格式的影响，包括 Setext、atx、Textile、reStructuredText、Grutatext 和 EtText，而最大灵感来源其实是纯文本电子邮件的格式。
总之， Markdown 的语法全由一些符号所组成，这些符号经过精挑细选，其作用一目了然。比如：在文字两旁加上星号，看起来就像*强调*。Markdown 的列表看起来，嗯，就是列表。Markdown 的区块引用看起来就真的像是引用一段文字，就像你曾在电子邮件中见过的那样。
Markdown 语法的目标是：成为一种适用于网络的书写语言。
Markdown 不是想要取代 HTML，甚至也没有要和它相近，它的语法种类很少，只对应 HTML 标记的一小部分。Markdown 的构想不是要使得 HTML 文档更容易书写。在我看来， HTML 已经很容易写了。Markdown 的理念是，能让文档更容易读、写和随意改。HTML 是一种发布的格式，Markdown 是一种书写的格式。就这样，Markdown 的格式语法只涵盖纯文本可以涵盖的范围。 Continue reading “Markdown 语法”
$ npm install --global gulp
$ npm install --save-dev gulp
gulpfile.js at the root of your project:var gulp = require('gulp');
gulp.task('default', function() {
// place code for your default task here
});
$ gulp
The default task will run and do nothing.
To run individual tasks, use gulp <task> <othertask>.
在项目的根目录新建gulpfile.js，require需要的module
var gulp = require('gulp'),
minifycss = require('gulp-minify-css'),
concat = require('gulp-concat'),
uglify = require('gulp-uglify'),
rename = require('gulp-rename'),
del = require('del');
压缩css
gulp.task('minifycss', function() {
return gulp.src('src/*.css') //压缩的文件
.pipe(gulp.dest('minified/css')) //输出文件夹
.pipe(minifycss()); //执行压缩
});
压缩js
gulp.task('minifyjs', function() {
return gulp.src('src/*.js')
.pipe(concat('main.js')) //合并所有js到main.js
.pipe(gulp.dest('minified/js')) //输出main.js到文件夹
.pipe(rename({suffix: '.min'})) //rename压缩后的文件名
.pipe(uglify()) //压缩
.pipe(gulp.dest('minified/js')); //输出
});
执行压缩前，先删除文件夹里的内容
gulp.task('clean', function(cb) {
del(['minified/css', 'minified/js'], cb)
});
默认命令，在cmd中输入gulp后，执行的就是这个命令
gulp.task('default', ['clean'], function() {
gulp.start('minifycss', 'minifyjs');
});
Using TNS
Data Source=TORCL;User Id=myUsername;Password=myPassword;
Example:
Data Source=localhost:1521/orcl; User Id=scott; Password=scott;
Using integrated security
Data Source=TORCL;Integrated Security=SSPI;
Using ODP.NET without tnsnames.ora
Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=MyHost)(PORT=MyPort)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=MyOracleSID)));
User Id=myUsername;Password=myPassword;
Using the Easy Connect Naming Method (aka EZ Connect)
The easy connect naming method enables clients to connect to a database without any configuration.
Data Source=username/password@//myserver:1521/my.service.com;
Port 1521 is used if no port number is specified in the connection string.
Make sure that EZCONNECT is enabled in the sqlnet.ora file. NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
‘//’ in data source is optional and is there to enable URL style hostname values
Easy Connect Naming Method to connect to an Instance
This one does not specify a service or a port.
Data Source=username/password@myserver//instancename;
Easy Connect Naming Method to connect to a dedicated server instance
This one does not specify a service or a port.
Data Source=username/password@myserver/myservice:dedicated/instancename;
Other server options: SHARED, POOLED (to use instead of DEDICATED). Dedicated is the default.
Specifying Pooling parameters
By default, connection pooling is enabled. This one controls the pooling mechanisms. The connection pooling service creates connection pools by using the ConnectionString property to uniquely identify a pool.
Data Source=myOracle;User Id=myUsername;Password=myPassword;Min Pool Size=10;
Connection Lifetime=120;Connection Timeout=60;Incr Pool Size=5;Decr Pool Size=2;
The first connection opened creates the connection pool. The service initially creates the number of connections defined by the Min Pool Size parameter.
The Incr Pool Size attribute defines the number of new connections to be created by the connection pooling service when more connections are needed.
When a connection is closed, the connection pooling service determines whether the connection lifetime has exceeded the value of the Connection Lifetime attribute. If so, the connection is closed; otherwise, the connection goes back to the connection pool.
The connection pooling service closes unused connections every 3 minutes. The Decr Pool Size attribute specifies the maximum number of connections that can be closed every 3 minutes.
Restricting Pool size
Use this one if you want to restrict the size of the pool.
Data Source=myOracle;User Id=myUsername;Password=myPassword;Max Pool Size=40;
Connection Timeout=60;
The Max Pool Size attribute sets the maximum number of connections for the connection pool. If a new connection is requested, but no connections are available and the limit for Max Pool Size has been reached the connection pooling service waits for the time defined by the Connection Timeout attribute. If the Connection Timeout time has been reached, and there are still no connections available in the pool, the connection pooling service raises an exception indicating that the request has timed-out.
Disable Pooling
Data Source=myOracle;User Id=myUsername;Password=myPassword;Pooling=False;
Using Windows user authentication
Oracle can open a connection using Windows user login credentials to authenticate database users.
Data Source=myOracle;User Id=/;
If the Password attribute is provided, it is ignored.
Operating System Authentication is not supported in a .NET stored procedure.
Privileged Connections
Oracle allows database administrators to connect to Oracle Database with either SYSDBA or SYSOPER privileges.
Data Source=myOracle;User Id=myUsername;Password=myPassword;DBA Privilege=SYSDBA;
SYSOPER is also valid for the DBA Privilege attribute.
Runtime Connection Load Balancing
Optimizes connection pooling for RAC database by balancing work requests across RAC instances.
Data Source=myOracle;User Id=myUsername;Password=myPassword;Load Balancing=True;
This feature can only be used against a RAC database and only if pooling is enabled (default).