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扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...p Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and building fully functional apps for Android devices. Compared to traditional text programming with Android Studio, it has limited features. We enabled App Inventor with multi-t...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...p Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and building fully functional apps for Android devices. Compared to traditional text programming with Android Studio, it has limited features. We enabled App Inventor with multi-t...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...p Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and building fully functional apps for Android devices. Compared to traditional text programming with Android Studio, it has limited features. We enabled App Inventor with multi-t...
svn cleanup: sqlite: database disk image is malformed
...a temporary folder and copy the .svn folder from the fresh copy to the old one. Then the old copy should work again and you can delete the temporary folder.
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SQL/mysql - Select distinct/UNIQUE but return all columns?
...ach time.
On some platforms (e.g. PostgreSQL, Oracle, T-SQL) this can be done directly using window functions:
select *
from (
select *,
row_number() over (partition by field1 order by field2) as row_number
from table
) as rows
where row_number = 1
On others (MySQL, SQLite), y...
github markdown colspan
...itHub (but not on StackOverflow)
<table>
<tr>
<td>One</td>
<td>Two</td>
</tr>
<tr>
<td colspan="2">Three</td>
</tr>
</table>
Becomes
...
Case insensitive 'in'
...st. (name.upper() for name in USERNAMES) would create only a generator and one needed string at a time - massive memory savings if you're doing this operation a lot. (even more savings, if you simply create a list of lowercase usernames that you reuse for checking every time)
–...
AngularJS - Trigger when radio button is selected
I searched and tried many ng-xxxx kind of options but couldn't find the one..
I just want to call some function in the controller when radio button is selected.
...
Check if two linked lists merge. If so, where?
...First, the numbers. Assume the first list is of length a+c and the second one is of length b+c, where c is the length of their common "tail" (after the mergepoint). Let's denote them as follows:
x = a+c
y = b+c
Since we don't know the length, we will calculate x and y without additional iterati...
Is there a standard sign function (signum, sgn) in C/C++?
...
Surprised no one has posted the type-safe C++ version yet:
template <typename T> int sgn(T val) {
return (T(0) < val) - (val < T(0));
}
Benefits:
Actually implements signum (-1, 0, or 1). Implementations here using co...