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Can I use a function for a default value in MySql?
...asily create a trigger to do this, such as:
CREATE TRIGGER before_insert_app_users
BEFORE INSERT ON app_users
FOR EACH ROW
SET new.api_key = uuid();
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Best way to create custom config options for my Rails app?
I need to create one config option for my Rails application. It can be the same for all environments. I found that if I set it in environment.rb , it's available in my views, which is exactly what I want...
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What's the right way to pass form element state to sibling/parent elements?
...a two way binding, you're telling the Root component that "hey, something happened down here, check out the values" or you're passing the state of some data in the child component up in order to update the state. You changed the state in C1, and you want C2 to be aware of it, so, by updating the sta...
【二进制】UrsAI2ByteArray 字节数组扩展：读写二进制数据，二进制文件读写...
...一个元素的索引）可以使用Base属性设置。可能的值为1（App Inventor中常用）或0（Java或C中常用）。组件以空数组开始，这意味着它不包含任何元素。可以使用以下方法添加元素：AddByte（无符号8位数字[0..255]）AddWord（无符号16位数...
ble蓝牙怎么接收中文 - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
...//www.fun123.cn/reference/iot/bluetooth_codec.html
保证单片机侧和App侧一致的中文编码方式即可。盲猜BLE中应该是UTF8编码，单片机GB2312编码。
Is it possible to prevent an NSURLRequest from caching data or remove cached data following a reques
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I have the same problem in my app when I requested info from twitter. In my case I didn't need to preserve those credentials, so I simple erase them using the next code:
- (void) eraseCredentials{
NSURLCredentialStorage *credentialsStorage = [NSURLCreden...
Objective-C: Property / instance variable in category
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fixed link for Associated Objects: developer.apple.com/library/ios/#documentation/cocoa/Conceptual/…
– MechEthan
Jan 4 '12 at 20:22
5
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Screenshot Apps for iPhone simulator [closed]
I was wondering if there are any good recommendations on apps that takes screenshots of the iPhone simulator. I've tried apps like iPhone screenshot cropper but I'm looking for something that will allow me to make larger images. For example large enough to put on a poster. Any suggestions?
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iOS / Android cross platform development [closed]
I've been playing around with developing Android apps in Java for a while and am starting to get a handle on it. However if I want to on start on an iOS version I need to code everything from scratch - which is, well, undesirable.
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iPhone app in landscape mode, 2008 systems
...citing news! As discovered by Andrew below, this problem has been fixed by Apple in 4.0+.
It would appear it is NO longer necessary to force the size of the view on every view, and the specific serious problem of landscape "only working the first time" has been resolved.
As of April 2011, it is not ...