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How to find the length of a string in R
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See ?nchar. For example:
> nchar("foo")
[1] 3
> set.seed(10)
> strn <- paste(sample(LETTERS, 10), collapse = "")
> strn
[1] "NHKPBEFTLY"
> nchar(strn)
[1] 10
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im...
C++ auto keyword. Why is it magic?
...r templates on any compiler that even sort of attempted to implement C++98/03. As such, adding support for auto was apparently fairly easy for essentially all the compiler teams--it was added quite quickly, and there seem to have been few bugs related to it either.
When this answer was originally w...
How to include “zero” / “0” results in COUNT aggregate?
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102
You want an outer join for this (and you need to use person as the "driving" table)
SELECT per...
Scala Doubles, and Precision
...formance.
– Rex Kerr
Jun 19 '12 at 20:33
28
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How to differentiate between time to live and time to idle in ehcache
...idated if it hasn't been requested for 4 seconds.
If timeToLiveSeconds = 90, then the object will be removed from cache after 90 seconds, even if it has been requested few milliseconds in the 90th second of its short life.
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Parcelable where/when is describeContents() used?
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answered Feb 6 '11 at 17:09
OgnyanOgnyan
12.5k33 gold badges5858 silver badges7171 bronze badges
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Closing multiple issues in Github with a commit message
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answered Aug 23 '10 at 20:13
Jakob BorgJakob Borg
19.8k66 gold badges4444 silver badges4646 bronze badges
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GMSGroundOverlay animating - should I be using a CATiledLayer?
...rray *longitudes = [NSMutableArray arrayWithCapacity:21];
for (int i = 0; i <= 20; i++) {
CGFloat radians = (float)i * ((2.0f * M_PI) / 20.0f);
// Calculate the x,y coordinate using the angle
CGFloat x = hDist * cosf(radians);
CGFloat y = vDist * sinf(radians)...
How to export plots from matplotlib with transparent background?
...e keyword argument transparent=True to save the image as a png file.
In [30]: x = np.linspace(0,6,31)
In [31]: y = np.exp(-0.5*x) * np.sin(x)
In [32]: plot(x, y, 'bo-')
Out[32]: [<matplotlib.lines.Line2D at 0x3f29750>]
In [33]: savefig('demo.png', transparent=True)
Result:
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Set scroll position
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You can use window.scrollTo(), like this:
window.scrollTo(0, 0); // values are x,y-offset
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