小编xox*_*xox的帖子

我对Unity3d中的场景有些困惑,我无法找到任何有关它们的资源.

1. 什么时候应该使用场景？例如,在平台游戏中,每个级别都必须是不同的场景？主菜单会是一个场景吗？
2. 可以叠加场景吗？
3. 资产如何在场景之间起作用？它们是否与每个场景相关联,每次都必须重新加载.可以指定何时不再需要资产？
4. 如何在场景之间的场景/界面之间发送数据？我知道这是一个广泛的主题,但我不希望垃圾邮件有多个问题.

我有一个包含两行的表,我想将上面的一行(以蓝色突出显示)缩小到其子div(.black)的高度,但我无法控制高度.

我试过修改

• div的边缘
• 行的边距,填充和高度
• table的table-layout样式属性

但这些都没有让我更进一步.

Codepen的完整源代码.

桌子:

<table>
  <tr>
    <td rowspan="2" style="padding-left: 10px;">
      <div class="col1"></div>
    </td>
    <td style="height: 1px;">
      <div class="black"></div>
    </td>
  </tr>
  <tr>
    <td>
      <div class="out"></div>
    </td>
  </tr>
</table>

div的风格:

div.black {
  display: inline-block;
  width: 128px;
  height: 10px;
  background-color: black;
  vertical-align: top;
  margin: 0px;
  margin-left: 10px;
}

C#中类型转换的最佳实践是什么？

   int temp=System.ConvertToInt32(Request.QueryString["Id"]);
    if (temp!=null)
      { // logic goes here }

如果Id以某种方式变成'abc',则会失败

除了if else语句之外,请建议使用三元运算符和其他单行语句(比如使用单行三元运算符).另外,你们更喜欢TryParse而非转换吗？为什么会这样？有你的发言人.

下面的脚本嵌入在<meta>标签正下方的 html 页面的 head 部分中。谁能解释一下将这么长的脚本放在没有内容的头部部分的目的是什么？

<script type="text/javascript">
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盒子和数组是可复制的,为什么这不能编译？

#[derive(Debug, Copy, Clone)]
enum Octree{
    Branch(Box<[Octree; 8]>),
    Filled,
    Empty,
}

编译错误:

main.rs:3:17: 3:21 error: the trait `Copy` may not be implemented for this type; variant `Branch` does not implement `Copy` [E0205]

编辑:好的,所以我不想Octree复制.但是我如何让它变得可变？我希望能够更改节点的子节点.

我想绘制单面而不是 xna 模型，因为它太慢了。

但是不知道有什么区别

• 绘制基元
• 绘制用户基元
• DrawIndexedPrimitives
• DrawUserIndexedPrimitives

哪种方法最快？指数有什么用？

我有一个应用程序的NodeJS AppFog并要连接到FTP服务器与此.
我npm install ftp使用"Ruby命令提示符" 安装它

这是唯一的代码行:

var FTPClient = require('ftp');

试图启动应用程序,它会抛出一个错误:

Skipping npm-support: npm-shrinkwrap.json is not provided

我应该使用哪种服务器或者问题是什么？

仍然没有开始:

Starting Application 'test007': .
Error: Application [test007] failed to start, logs information below.
====> /logs/staging.log <====

# Logfile created on 2013-03-09 10:37:09 +0000 by logger.rb/25413
Installing dependencies. Node version 0.8.14
Installing ftp@0.2.9 from local path
Installing xregexp@2.0.0 from local path
Installing node@0.0.0 from local path
Installing nodejs@0.0.1 from local path

但是没有显示错误.

提前致谢

如何在JavaScript中为HTML5画布启用硬件加速？或者在JavaScript中不可能？我记得我在某处读过使用CSS或Webgl的东西,但我记不住了.

这是我的抽象类:

abstract class Enemy
{
    protected static abstract float HEALTH
    {
        get;
    }

    float health;

    void someMethod()
    {
        health = HEALTH;
    }
}

这是我的派生类:

abstract class BadGuy : Enemy
{
    protected override static float HEALTH
    {
        get { return 1; }
    }
}

Compiler先生说我不能让成员HEALTH在Enemy课程中保持静态和抽象.

我的目标是强制每个子类具有可以从父类访问的静态或常量字段.

这有解决方案吗？如果没有,最优雅的解决方法是什么？使财产非静态？

Coming from JavaScript I am used to the fact that code execution does not interleave, with await expressions being an exception, which define fixed re-entry points.
The .NET asynchrony semantics appear to be different though: During every call of Thread.Sleep, a Task waiting to be run jumps in and performs work. Then, on return of of the Sleep call, the Task's computation is interrupted immediately, as the code below demonstrates.

How can I achieve atomic execution of …