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Generating Guids in Ruby

... As of Ruby 1.9, uuid generation is built-in. Use the SecureRandom.uuid function. For example: require 'securerandom' SecureRandom.uuid # => "96b0a57c-d9ae-453f-b56f-3b154eb10cda" ...
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How do you create a random string that's suitable for a session ID in PostgreSQL?

... years old. Check out this for a totally different method using gen_random_uuid(): faster, more randomness, more efficiently stored in the database. – Evan Carroll Jan 12 '17 at 8:11 ...
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正则表达式 不包含指定字符串 - 更多技术 - 清泛网 - 专注C/C++及内核技术

正则表达式 不包含指定字符串做日志分析工作的经常需要跟成千上万的日志条目打交道,为了在庞大的数据量中找到特定模式的数据,常常需要编写很多复杂的正则表达式。例如枚举出日志文件中不包含某个特定字符串的条目...
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c/c++取结构体指定成员的偏移,及原理解析 - C/C++ - 清泛网 - 专注C/C++及内核技术

c/c++取结构体指定成员的偏移,及原理解析c_offset_of可以使用std标准函数 offsetof(),在stddef h头文件中,实现原理如下(模拟系统的实现): define MY_STRUCT_OFFSET(s, m) ((size_t)(& ((s*)0)->m ))原理如下:1、0即空指 可以使用std标准函数 of...
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Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞 ...

Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞int send( SOCKET s, const char FAR *buf, int len, int flags ); 不论是客户还是服务器应用程序都用send函数来向TCP连接的...int send( SOCKET s, const char FAR *buf, int len, int flags ); ...
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C#操作XML小结 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... //初始化一个xml实例 XmlDocument xml=new XmlDocument(); //导入指定xml文件 xml.Load(path); xml.Load(HttpContext.Current.Server.MapPath("~/file/bookstore.xml")); //指定一个节点 XmlNode root=xml.SelectSingleNode("/root"); //获取节点下所有直接子节点 XmlNodeLi...
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搜狗百度入口之争升级 开放竞合成流量变现抓手 - 资讯 - 清泛网 - 专注C/C+...

...“灵犀”输入法说起。简单的来说,此前当用户打开百度搜索框,行为非常明确使用百度进行搜索行为时,用户使用“搜狗输入法”在百度搜索框输入文字,搜狗“灵犀”输入法自动(注意非用户行为)提供混淆百度搜索联想功能...
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How to find serial number of Android device?

...oogle's recommendations, I implemented a class that will generate a unique UUID for each device, using ANDROID_ID as the seed where appropriate, falling back on TelephonyManager.getDeviceId() as necessary, and if that fails, resorting to a randomly generated unique UUID that is persisted across app ...
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IOException: read failed, socket might closed - Bluetooth on Android 4.3

...; import java.lang.reflect.Method; import java.util.List; import java.util.UUID; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothSocket; import android.util.Log; public class BluetoothConnector { private BluetoothSocketWra...
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How do I create a unique ID in Java? [duplicate]

... Create a UUID. String uniqueID = UUID.randomUUID().toString(); share | improve this answer | follow ...