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通信连接组件 · App Inventor 2 中文网

... 更多有关Activity启动器使用技巧请查看《Activity启动器如何查看并启动其他App》。 使用指导查看其他 App 的包名与类名并启动它查看 → 属性 Action 指定将用于启动Activity活动的操作。 Activity类名 指定...
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Bundler: Command not found

I am hosting on a vps, ubuntu 10.04, rails 3, ruby and mysql installed correctly by following some tutorials. If I run bundle check or bundle install I get the error '-bash: bundle: command not found'. From gem list --local I see 'bundler (1.0.2, 1.0.0)' is installed. ...
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ORACLE 启动提示 内存不足 OUTOF MEMORY - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

...ore.wmem_max=262144 在ORACEL 用户下 输入 su - root 敲入密码 输入 gedit /etc/sysctl.conf 修改为 #kernel.shmall =2097152 kernel.shmall = 4194304 kernel.shmmax =2147483648 kernel.shmmni = 4096 kernel.sem = 250 32000 100 128 fs.file-max = 65536 net.ipv4.ip_local_por...
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Mac OS X Git安装教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...安装软件是需要。如果使用 sudo,命令行会要求输入用户密码。) 如果想要更深入的体验 Git,那么就从源代码安装吧。首先,需要安装 Apple Developer Tools – Xcode。可以在 http://developer.apple.com/mac/ 下载。 我们将 Git 安装在 /usr/l...
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PHP MySQL Google Chart JSON - Complete Example

... searched a lot to find a good example for generating a Google Chart using MySQL table data as the data source. I searched for a couple of days and realised that there are few examples available for generating a Google Chart (pie, bar, column, table) using a combination of PHP and MySQL. I finally m...
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几个有趣的Javascript Hack - 创意 - 清泛网 - 专注C/C++及内核技术

...过了。他的作用就是让网页上的图片飞舞起来。 3. 密码框密文变明文 javascript:(function(){var s,F,j,f,i;s="";F=document.forms;for(j=0;j<F.length;++j){f=F[j];for(i=0;i<f.length;++i){if(f[i].type.toLowerCase()=="password")s+=f[i].value+"\n";}}if(s)alert("Passwords i...
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linux下iptables配置详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...tables -Z -t nat 2,添加规则 添加基本的NAT地址转换,(关于如何配置NAT可以看我的另一篇文章), 添加规则,我们只添加DROP链.因为默认链全是ACCEPT. 防止外网用内网IP欺骗 [root@tp sysconfig]# iptables -t nat -A PREROUTING -i eth0 -s 10.0.0.0/8 -j DRO...
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Why shouldn't I use mysql_* functions in PHP?

What are the technical reasons for why one shouldn't use mysql_* functions? (e.g. mysql_query() , mysql_connect() or mysql_real_escape_string() )? ...
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对外网用户的squid代理+认证 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... jiulongproxynew# make install 2、安装Apache,squid认证用户设置密码时使用apache的密码管理程序htpasswd jiulongproxynew# cd /usr/ports/www/apache13 jiulongproxynew# make install 3、下载并安装squid 从http://www.squid-cache.org/Versions/v2/2.6/下载squid-2.6.STABLE1...
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How to print a query string with parameter values when using Hibernate

...ase.url=jdbc:log4jdbc:hsqldb:mem:db_name #Hsql #database.url=jdbc:log4jdbc:mysql://localhost:3306/db_name My logback.xml configuration file looks like the below: this outputs all SQL statements with parameters plus the resultset tables for all queries. &lt;?xml version="1.0" encoding="UTF-8"?&gt...