小编yze*_*nik的帖子

当我运行我的应用程序时,浏览器显示

[ExecutionException: Boxed Error]

它没有说明行号等.

在控制台中,我有以下内容

! @6elaah0c8 - Internal server error, for (GET) [/testlearn] ->

play.api.Application$$anon$1: Execution exception[[ExecutionException: Boxed Error]]
    at play.api.Application$class.handleError(Application.scala:289) ~[play_2.10.jar:2.1.1]
    at play.api.DefaultApplication.handleError(Application.scala:383) [play_2.10.jar:2.1.1]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$17$$anonfun$apply$24.apply(PlayDefaultUpstreamHandler.scala:326) [play_2.10.jar:2.1.1]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$17$$anonfun$apply$24.apply(PlayDefaultUpstreamHandler.scala:324) [play_2.10.jar:2.1.1]
    at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) [play_2.10.jar:2.1.1]
    at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) [play_2.10.jar:2.1.1]
java.util.concurrent.ExecutionException: Boxed Error
    at scala.concurrent.impl.Promise$.resolver(Promise.scala:52) ~[factorie-1.0.0-M4-jar-with-dependencies.jar:na]
    at scala.concurrent.impl.Promise$.scala$concurrent$impl$Promise$$resolveTry(Promise.scala:44) ~[factorie-1.0.0-M4-jar-with-dependencies.jar:na]
    at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:116) ~[factorie-1.0.0-M4-jar-with-dependencies.jar:na]
    at scala.concurrent.Promise$class.complete(Promise.scala:55) ~[factorie-1.0.0-M4-jar-with-dependencies.jar:na]
    at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:58) ~[factorie-1.0.0-M4-jar-with-dependencies.jar:na]
    at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:23) [factorie-1.0.0-M4-jar-with-dependencies.jar:na]
Caused by: java.lang.AssertionError: assertion failed
    at scala.Predef$.assert(Predef.scala:165) ~[factorie-1.0.0-M4-jar-with-dependencies.jar:na]
    at cc.factorie.util.TraversableExtras$class.max2ByDouble(TraversableExtras.scala:95) ~[factorie-1.0.0-M4-jar-with-dependencies.jar:na]
    at cc.factorie.package$$anon$2.max2ByDouble(package.scala:148) ~[factorie-1.0.0-M4-jar-with-dependencies.jar:na]
    at cc.factorie.optimize.SampleRankExample.accumulateExampleInto(SampleRank.scala:31) ~[factorie-1.0.0-M4-jar-with-dependencies.jar:na]
    at cc.factorie.optimize.OnlineTrainer$$anonfun$processExamples$3.apply(Trainer.scala:72) ~[factorie-1.0.0-M4-jar-with-dependencies.jar:na] …

我正在尝试在CentOS机器上编译用C编写的Python扩展.我正进入(状态

error: Python.h: No such file or directory

它在ubuntu上运行正常,我使用apt-get安装了python-dev.

我尝试使用安装python-devel

yum install python-devel

但它已经安装好了.我该如何解决这个错误？

我试图使用FormData类使用HttpRequest.send()将数据发送到我的服务器.我需要用多个字段做一个POST请求.它应该与此Javascript代码相同:

//Upload File
var uploadFile = function(file, tag, callback)
{
    var xhr = new XMLHttpRequest();
    xhr.open('POST', "upload/", true);
    xhr.onreadystatechange=function()
    {
        if (xhr.readyState==4 && xhr.status==200)
        {
            callback();
        }
    }
    var formData = new FormData();
    formData.append('file', file);
    formData.append('tag', tag);
    var csrftoken = $.cookie('csrftoken');
    xhr.setRequestHeader("X-CSRFToken", csrftoken);
    xhr.send(formData);
};

但是在Dart中,FormData似乎没有相同的工作方式.如果有可能,有人可以解释如何在Dart中执行此操作吗？

我需要检查字符串是否与某个模式匹配.模式是:

"B-n,I-n"

其中n是整数.这有一个很好的正则表达式吗？

编辑:"B-"之后和"I-"之后的数字必须相同.