小编bas*_*eps的帖子

有关于将Dart与MongoDB一起使用的最新工作示例吗？我正在尝试的所有样本都会出错.以下示例.

码:

import 'package:mongo_dart/mongo_dart.dart';

main(){
  Db db = new Db("mongo-dart-blog"); // Throws an error.
}

错误:

Unhandled exception:
Invalid scheme in uri: mongo-dart-blog 
#0      Db.Db (package:mongo_dart/src/database/db.dart:25:7)
#1      main (file:///.../MongoDart/app.dart:4:11)

我想将用户信息从我的用户注册表单传递给Web组件.这可能吗.如下所示:

app.addRequestHandler(
  (req) => req.method == 'POST' && req.path == '/newUser',
  (req, res) {
    ...
    input.onClosed = () {
      ...
      var user = new User();
      user.name = params["user[first_name]"];
      user.email = params["user[email]"];
      res.outputStream.writeString('<x-MyWebComponent data-value="User: user"></x-MyWebComponent>');
      res.outputStream.close();
    };
    ...
  }
);

当我进入rails控制台时,我设置了pry来代替irb.我找不到页面或记住如何将其恢复到默认行为,因为它似乎干扰了我的Rubymine调试器.有什么建议？

编写下面代码的Rails 3.1是什么:

named_scope :min_2_items_last_90_days, {
    :include => { :orders => :order_items },
    :conditions => ['orders.created_at >= ?', 90.days.ago],
    :group   => 'people.id',
    :having => 'COUNT(order_items.id) >= 2'
  }

如何使用Dart获取最后一次插入/保存到mongoDB的Id？

我试图用RSpec学习tdd.我从网上找到的备忘单中拿了这个例子,我对如何实现它感到有点困惑.添加MovieList.new是自动的,但是如果已经使用ActiveRecord处理参数,我将如何添加参数.然后添加"前进"方法.

describe "forward" do
  it "should jump to a next movie" do
    next_movie = MovieList.new(2).forward
    next_movie.track_number.should == 2
  end
end

是否可以使用Process.start()设置环境变量？我试图从http://www.dartlang.org/articles/io/调整Process示例,但我收到了错误.

Process.start("export my_key='abc123'", []).then((process) {
  var stdoutStream = new StringInputStream(process.stdout);
  stdoutStream.onLine = () => print(stdoutStream.readLine());
  process.stderr.onData = process.stderr.read;
  process.onExit = (exitCode) {
    print('exit code: $exitCode');
};

错误:

Unhandled exception:
FutureUnhandledException: exception while executing Future
  ProcessException: No such file or directory
    Command: export my_key='abc123' 
original stack trace:
  null
#0      _FutureImpl._complete (bootstrap:844:11)
#1      _FutureImpl._complete (bootstrap:848:5)
#2      _FutureImpl._setException (bootstrap:873:14)
#3      _CompleterImpl.completeException (bootstrap:948:30)
#4      _ProcessImpl._start.<anonymous closure> (dart:io-patch:198:37)
#5      _Timer._createTimerHandler._handleTimeout (dart:io:6918:28)
#6      _Timer._createTimerHandler._handleTimeout (dart:io:6926:7)
#7      _Timer._createTimerHandler.<anonymous closure> (dart:io:6934:23)
#8      _ReceivePortImpl._handleMessage (dart:isolate-patch:37:92)

在下面的代码示例中，有一种“ Angular 方式”可以防止按钮单击或表单提交的默认事件。目前我正在使用“onsubmit”来完成任务。

<form onsubmit="return false;">
  <input ng-model="ctrl.task">
  <button class="btn btn-primary" ng-click="ctrl.addTask()">Add</button>
</form>

如何将以下行从Objective-C转换为Java:

NSLog(@"Current question: %@",question);

如何在Dart中记录我的网站访客IP地址？

Request.UserHostAddress在Asp.net中是否有与Dart 类似的东西 ？

提前致谢.