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App Inventor 2 变量代码块 · App Inventor 2 中文网
...化全局变量
该块用于创建全局变量,它接受任何类型的值作为参数。单击 变量名 将更改此全局变量的名称,全局变量用于所有过程或事件,因此该块将独立存在。
全局变量可以在应用程序运行时更改,并且可以从应用程序...
App Inventor 2 AsciiConversion 拓展,ASCII编码与解码,Ascii码转换 · App Inventor 2 中文网
... AsciiConversion 拓展
AsciiCode: 给出字符,返回它相应的 Ascii码。
GiveCharacter: 给出 Ascii码,返回它相应的字符。
Conversion: 给出 Ascii码列表,转换后返回相应的文本。
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AsciiConversion 拓展
.aix 拓展...
App Inventor 2 使用MIT代理的组件访问令牌的获取方法 · App Inventor 2 中文网
...
App Inventor 2 使用MIT代理的组件访问令牌的获取方法
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获取有效“访问令牌”或“API密钥”的方式
访问MIT服务器
网址:
code.appinventor.mit.edu 正常情况...
MIT已发布v2.75版本,中文网已同步升级最新版本 - App Inventor 2 中文网 -...
大概的更新有:
1、添加一个绝对位置的布局。
2、ListView 组件升级,大图片+描述模式,支持左右滑动。
3、地图可自定义url,支持其他厂商地图,待探索测试国内地图看是否支持。
4、修复表格布局的复制粘贴bug,这个比较...
Why don't structs support inheritance?
... "inline storage" behavior of arrays, Bad Things happen, as can be seen in C++.
Consider this pseudo-C# code:
struct Base
{
public int A;
}
struct Derived : Base
{
public int B;
}
void Square(Base[] values)
{
for (int i = 0; i < values.Length; ++i)
values [i].A *= 2;
}
Derive...
How can I reliably get an object's address when operator& is overloaded?
...
Update: in C++11, one may use std::addressof instead of boost::addressof.
Let us first copy the code from Boost, minus the compiler work around bits:
template<class T>
struct addr_impl_ref
{
T & v_;
inline addr_impl_r...
Why is enum class preferred over plain enum?
I heard a few people recommending to use enum classes in C++ because of their type safety .
9 Answers
...
Which Boost features overlap with C++11?
I put my C++ skills on the shelf several years ago and it seems now, when I need them again, the landscape has changed.
2 A...
Are static class variables possible in Python?
...4
>>> MyClass.i, m.i
>>> (3, 4)
This is different from C++ and Java, but not so different from C#, where a static member can't be accessed using a reference to an instance.
See what the Python tutorial has to say on the subject of classes and class objects.
@Steve Johnson has a...
iPhone App 开发第一步:从零到真机调试HelloWorld - 更多技术 - 清泛网 - ...
...明出处! 最近才开始研究iPhone开发,由于没有Mac,采用的是AMD CPU + Win7 + VMWare之后安装Mac OS X Snow Le... iCc原创,转载请注明出处!
最近才开始研究iPhone开发,由于没有Mac,采用的是AMD CPU + Win7 + VMWare之后安装Mac OS X Snow Leopard,...
