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App Inventor 2 Encrypt.Security 安全性扩展：MD5哈希，SHA1和SHA256哈希...
...，RSA加密/解密，BASE64编码/解码方法。
权限
此扩展程序不需要任何权限。
事件
OnErrorOccured
抛出任何异常时将触发此事件。此事件中有两个变量：method和message。变量“method”是发生错误的方法的名称。变量“message”是例外...
Arduino101（Genuino 101）&App Inventor – RGB LED控制 - 创客硬件开...
...tps://blog.cavedu.com/2017/02/ ... %e6%8e%a7%e5%88%b6/
本文將介紹如何取得觸碰點的 RGB 參數之後透過 BLE 送給 Arduino 101 來點亮 RGB LED。
App InventorDesigner使用 Canvas 來取得觸碰點座標。兩個連線斷線用的按鈕：Btn_Connect / Btn_DisConnec...
libevent对比libev的基准测试 - C/C++ - 清泛网 - 专注C/C++及内核技术
...libevent 每次迭代的总时间增加得快得多，无论客户端数量如何，花费的时间几乎是 libev 的两倍。不过，两者都表现出相似的增长特征。
轮询时间也非常相似，libevent 在 1000-fd 情况下始终较慢，而在 100-fd 情况下，时间几乎相同...
What is the difference between Class Path and Build Path
...lasses used by your code. We sometimes refer to these as 'dependencies'.
NB: These external packages may be packaged inside a compressed .jar file or indeed, there may be several jar files packaged inside a 'library'. A library or group of libraries often make up a 'framework'.
If your code requ...
How to create materialized views in SQL Server?
...ame
insert into cachetablename select * from viewname
commit transaction
NB: this will eat space, also in your tx logs. Best used for small datasets that are slow to compute. Maybe refactor to eliminate "easy but large" columns first into an outer view.
...
How can I dynamically create derived classes from a base class
...ct is expected: this seems related to the fact super(self.__class__) is a unbound super object. What is its __init__() method? I'm not sure which such method could require a first argument of type type. Could you explain? (Side note: my super() approach indeed does not make sense, here, because __in...
C++对象布局及多态探索之菱形结构虚继承 - C/C++ - 清泛网 - 专注C/C++及内核技术
... |
|ospt,4,11 |m,1 |ospt,4,6 |m,1 |m,1 |vtpt,4 |m1 |
(注：为了不折行，我用了缩写。ospt代表偏移值指针、m代表成员变量、vtpt代表虚表指针。第一个数字是该区域的大小，即字节数。只有偏移值指针有第二个数字，第二个数字就是偏...
RadioButton单选按钮扩展集合 · App Inventor 2 中文网
...置和间距调整
使用原理
MIT App Inventor不提供RadioButton组件，但CheckBox的行为与RadioButton非常相似。在Android操作系统中，两个控件都派生自相同的基类（CompoundButton）。此扩展将CheckBox转换为RadioButton。
使...
全食超市（Whole Foods Market）——精品超市的运营之道 - 资讯 - 清泛网 -...
...以性价比主攻大众市场，有机食品的高端定位与大众客群不匹配，使其成为细分蓝海市场；2）从选址到选品，聚焦高端消费群体。从门店选址开始即聚焦高端定位，富人&高知人群聚集区开店，自有生产基地+门店本地采购+自建...
How to filter specific apps for ACTION_SEND intent (and set a different text for each app)
...nt() {
final String[] twitterApps = {
// package // name - nb installs (thousands)
"com.twitter.android", // official - 10 000
"com.twidroid", // twidroid - 5 000
"com.handmark.tweetcaster", // Tweecaster - 5 000
"com.thedeck.android" }...