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What is Rack middleware?

... any of them will do. Let's create a simple web application that returns a JSON string. For this we'll create a file called config.ru. The config.ru will automatically be called by the rack gem's command rackup which will simply run the contents of the config.ru in a rack-compliant webserver. So let...
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boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术

...愈发愈感觉出它的强大,每次学习后在实战项目中高效地使用,都让我兴奋不已,为了让自己记忆更深刻,同时也希望越来越多的同行们能快速高质量地解决实际项目中遇到的各种问题,在此将我将自己实战中实用boost的经验分...
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Getting visitors country from their IP

..._VALIDATE_IP) && in_array($purpose, $support)) { $ipdat = @json_decode(file_get_contents("http://www.geoplugin.net/json.gp?ip=" . $ip)); if (@strlen(trim($ipdat->geoplugin_countryCode)) == 2) { switch ($purpose) { case "location": ...
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appending array to FormData and send via AJAX

... You have several options: Convert it to a JSON string, then parse it in PHP (recommended) JS var json_arr = JSON.stringify(arr); PHP $arr = json_decode($_POST['arr']); Or use @Curios's method Sending an array via FormData. Not recommended: Serialize the data with...
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jQuery pass more parameters into callback

...sh to pass. $.post("someurl.php", someData, doSomething(extraStuff), "json"); }; What is happening? In the last line, doSomething(extraStuff) is invoked and the result of that invocation is a function pointer. Because extraStuff is passed as an argument to doSomething it is within scope of ...
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How to serialize Joda DateTime with Jackson JSON processor?

... In the object you're mapping: @JsonSerialize(using = CustomDateSerializer.class) public DateTime getDate() { ... } In CustomDateSerializer: public class CustomDateSerializer extends JsonSerializer<DateTime> { private static DateTimeFormatter ...
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Oracle 11.2.0.4 RAC FOR redhat 6.4 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

...盘柜断开了,断开再次安装,没有这个选项了 选着使用自定义布局 分区的布局 择 基本服务 现在自定义 选 由于有多张HBA卡 所以需要安装多路径支持 在基本服务选择 存储可用性工具 桌面支...
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由12306.cn谈谈网站性能技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...种常用的方法,我在下面列举一下,我相信12306这个网站使用下面的这些技术会让其性能有质的飞跃。 一、前端负载均衡 通过DNS的负载均衡器(一般在路由器上根据路由的负载重定向)可以把用户的访问均匀地分散在多个Web服...
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App Inventor 2 构建纯血鸿蒙 HarmonyOS App · App Inventor 2 中文网

...调试证书(Debug证书) 用途:开发测试阶段使用 来源:SDK自带,无需手动申请 限制:只能在已注册UDID的设备上运行 App Inventor处理方式:BuildServer 自动使用 SDK 自带的 OpenHarmony.p12 进行 Debug 签名,用户无感知 ...
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海量数据相似度计算之simhash和海明距离 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...看起来很简单,我们来做个测试,就拿最简单的两个数据使用Apache提供的 Levenshtein for 循环100w次计算这两个数据的相似度。代码结果如下: String s1 = "你妈妈喊你回家吃饭哦,回家罗回家罗" ; String s2 = "你妈妈叫你回家吃饭啦...