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App Inventor 2 DynamicComponents 拓展：动态创建AI2组件对象 · App Inventor 2 中文网
... DynamicComponents 拓展
.aix 拓展下载（最新版 v2.3.0）：
com.yusufcihan.DynamicComponents.aix
完全支持 App Inventor 2 的动态组件扩展。它基于 Java 的反射功能，因此只需键入类名称即可搜索类来创建组件。因此，它对特定组件的...
How can I delete all of my Git stashes at once?
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TadeckTadeck
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14
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Difference between __str__ and __repr__?
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23 Answers
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How can I programmatically create a new cron job?
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answered Mar 4 '09 at 14:38
S.LottS.Lott
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filter for complete cases in data.frame using dplyr (case-wise deletion)
... num 1 2
## $ x2: num 1 2
## - attr(*, "na.action")= 'omit' Named int 3 4
## ..- attr(*, "names")= chr "3" "4"
ADDED Have updated to reflect latest version of dplyr and comments.
ADDED Have updated to reflect latest version of tidyr and comments.
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How do I format a date with Dart?
...ow do I do that? I want to turn the date into a string, something like "2013-04-20".
11 Answers
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How to join two generators in Python?
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answered Jul 9 '10 at 8:30
PhilippPhilipp
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Android: How to enable/disable option menu item on button click?
...d.example_foobar).setEnabled(false);
}
return true;
}
On Android 3.0 and higher, the options menu is considered to always be open when menu items are presented in the action bar. When an event occurs and you want to perform a menu update, you must call invalidateOptionsMenu() to request th...
How do I get the day of week given a date?
...rt datetime
>>> datetime.datetime.today()
datetime.datetime(2012, 3, 23, 23, 24, 55, 173504)
>>> datetime.datetime.today().weekday()
4
From the documentation:
Return the day of the week as an integer, where Monday is 0 and Sunday is 6.
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