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How to implement a unique index on two columns in rails
...t different syntax for specifying the columns.
– François Beausoleil
Nov 8 '10 at 13:30
14
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Usage of forceLayout(), requestLayout() and invalidate()
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To better understand answers provided by François BOURLIEUX and Dalvik I suggest you take a look at this awesome view lifecycle diagram by Arpit Mathur:
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GetType() can lie?
... answered May 28 '13 at 9:22
Mårten WikströmMårten Wikström
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App Inventor 2 AI伴侣有电脑版的吗? - App Inventor 2 中文网 - 清泛网 - 专注C/C++及内核技术
...拨打或接听电话等，也无法模拟蓝牙通信（需要测试SPP/BLE蓝牙通信的请使用安卓真机）。
Q：AI伴侣扫码测试时手机和电脑必须在同一局域网内吗？
A：旧的兼容模式的测试原理是电脑端启动Web服务供手机连接，两者必须在同...
Excel: last character/string match in a string
...ted Oct 17 '14 at 7:40
Jean-François Corbett
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answered Sep 4 '13 at 15:19
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App Inventor 2 连接方式：AI伴侣、模拟器、USB · App Inventor 2 中文网
...拨打或接听电话等，也无法模拟蓝牙通信（需要测试SPP/BLE蓝牙通信的请使用安卓真机）。
Q：AI伴侣扫码测试时手机和电脑必须在同一局域网内吗？
A：旧的兼容模式的测试原理是电脑端启动Web服务供手机连接，两者必须在同...
How to use if - else structure in a batch file?
...%==0 IF %C%==1 (
::copying a directory c from d, /s: boş olanlar hariç, /e:boş olanlar dahil
xcopy "%sourceCopyDirectory%" "%destinationCopyDirectory%" /s/e
)
IF %F%==0 IF %C%==0 (
::moving a directory
xcopy /E "%sourceMoveDirectory%" "%destinationMoveDirectory%"
rd /s /...
App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...型】PosenetExtension 拓展：人体姿势识别
【AI模型】TeachableMachine 拓展：使用设备摄像头训练视觉模型
【AI模型】FaceMeshExtension 拓展：人脸标记识别
【AI模型】LookExtension 拓展：使用编译到扩展中的神经网络进行物品识别
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How to change XAMPP apache server port?
This is my Apache httpd.conf settings :
6 Answers
6
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Enter “&” symbol into a text Label in Windows Forms?
...ed Dec 1 '10 at 14:03
Øyvind BråthenØyvind Bråthen
52.2k2525 gold badges113113 silver badges138138 bronze badges
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