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How to reuse an ostringstream?
... The size is messing it up (i can see the first character is null but it prints much more). Is there a good way to fix the str length? i am using s.str().c_str(); ATM and it works nicely
– user34537
Jun 6 '11 at 16:09
...
Arduino101（Genuino 101）&App Inventor – RGB LED控制 - 创客硬件开...
...1秒鐘觸發一次 Clock.Timer事件，其中會使用 BluetoothLE.WriteIntValue 將 r g b 值的組合結果發送出去，例如 (128, 34, 255) 的組合結果就是 128034255，Arduino 收到之後再拆解即可。
Clock.Timer 事件的1秒鐘您可以自行修改為較小的數字，看看是...
How to turn on front flash light programmatically in Android?
...ng on/off camera flashlight in android..
Update 4
If you want to set the intensity of light emerging from camera LED you can refer Can I change the LED intensity of an Android device? full post. Note that only rooted HTC devices support this feature.
** Issues:**
There are also some problems whi...
Reducing the space between sections of the UITableView
...)tableView:(UITableView*)tableView
heightForHeaderInSection:(NSInteger)section {
if (section == 0) {
return 6.0;
}
return 1.0;
}
- (CGFloat)tableView:(UITableView*)tableView
heightForFooterInSection:(NSInteger)section {
return 5.0;
}
- (UIView*)tabl...
How to hide status bar in Android
...
if (Build.VERSION.SDK_INT < 16) {
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
} else {
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_...
How can I add an animation to the activity finish()
... fixed this issue using this kind of approach:
to open with animation:
Intent newUser = new Intent(getBaseContext(), NewUserActivity.class);
startActivity(newUser);
overridePendingTransition(R.anim.slide_in_right,R.anim.slide_out_left);
To close with animation:
@Override
public boolea...
Python assigning multiple variables to same value? list behavior
... b
True
You then ask:
what is different from this?
d=e=f=3
e=4
print('f:',f)
print('e:',e)
Here, you're rebinding the name e to the value 4. That doesn't affect the names d and f in any way.
In your previous version, you were assigning to a[0], not to a. So, from the point of view of a[...
When to use generic methods and when to use wild-card?
...er> src)
it won't work as expected. In 2nd case, you can pass List<Integer> and List<Float> as dest and src. So, moving elements from src to dest wouldn't be type safe anymore.
If you don't need such kind of relation, then you are free not to use type parameters at all.
Some other ...
Send JSON data via POST (ajax) and receive json response from Controller (MVC)
...
@Dave no, an endpoint (in this case an mvc controller function) should NEVER trust a client, therefore the XSS check should be done at the server. The controller is responsible for parsing the data in the correct way and send the data back to ...
Pandas DataFrame Groupby two columns and get counts
... 3
C 1
4 B 1
5 B 2
6 B 1
dtype: int64
To get the same answer as waitingkuo (the "second question"), but slightly cleaner, is to groupby the level:
In [12]: df.groupby(['col5', 'col2']).size().groupby(level=1).max()
Out[12]:
col2
A 3
B 2
C ...