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App Inventor 俄罗斯方块：画布实现的完整小游戏（附 .aia 源码） · App Inventor 2 中文网
...来就是一块块的。
procedure 画格(x, y, 边长, 颜色) {
画布_棋盘.PaintColor = 颜色
画布_棋盘.DrawShape([[x + 1, y + 1], [x + 边长 - 1, y + 1], [x + 边长 - 1, y + 边长 - 1], [x + 1, y + 边长 - 1]], true)
}
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画布的 Flung 事件...
C++ catching all exceptions
...
try{
// ...
} catch (...) {
// ...
}
will catch all C++ exceptions, but it should be considered bad design. You can use c++11's new current_exception mechanism, but if you don't have the ability to use c++11 (legacy code systems requiring a rewrite), then you have no name...
App Inventor 2 AnimatedGif扩展教程 - 显示GIF动画 · App Inventor 2 中文网
...
概述
为什么需要扩展？
KIO4_AnimatedGif扩展
下载
基本用法
控制播放
GIF文件放置位置
替代方案：WebView显示GIF
常见问题
Q1: GIF不显示动画？
Q2: GIF播放卡顿？
...
Finding out whether a string is numeric or not
...
@KMGorbunov I don't think that NSCharacterSet is actually storing a backing set that contains every single character in the set. I suspect invertedSet is returning a class that wraps the set it was created form, and returns the opposite value for all queries. But I don't know f...
How to close current tab in a browser window?
...ndow.close();
or you can specify a different window.
So:
function close_window() {
if (confirm("Close Window?")) {
close();
}
}
with HTML:
<a href="javascript:close_window();">close</a>
or:
<a href="#" onclick="close_window();return false;">close</a>
You r...
ASP.NET MVC 3: Override “name” attribute with TextBoxFor
...
Rob, actually there is a much simpler way. Instead of name, use Name:
@Html.TextBoxFor(x => x.Data, new { Name = Model.Key + "_Data", id = Model.Key + "_Data" })
...
Does a view exist in ASP.NET MVC?
... aside: one of our engineers (since moved on) built a custom view engine (called MultiTenantViewEngine, so you get a sense of its purpose) that implements FindView to throw a HttpException (404) if it can't find the given view. Is this good practice? I have no idea. But wouldn't be surprised if t...
Most efficient way to create a zero filled JavaScript array?
... @PimpTrizkit arr = Array(n) and (arr = []).length = n behave identically according to the spec. In some implementations one could be faster, but I don't think there is a big difference.
– Oriol
Sep 22 '15 at 16:39
...
Rails I18n validation deprecation warning
... the following line inside the Rails::Application body
config.i18n.enforce_available_locales = true
The possible values are:
false: if you
want to skip the locale validation
don't care about locales
true: if you
want the application to raise an error if an invalid locale is passed (or)
wan...
How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer? [closed]
... of JDK from Oracle (for example jdk-7u7-windows-x64.exe)
Download and install 7-Zip (or download 7-Zip portable version if you are not administrator)
With 7-Zip extract all the files from jdk-XuXX-windows-x64.exe into the directory C:\JDK
Execute the following commands in cmd.exe:
cd C:\JDK\.rsrc...