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When should I use a struct instead of a class?
... to primitive types
(integer, double, and so on).
It has an instance size smaller than 16 bytes.
It is immutable.
It will not have to be boxed frequently.
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Hidden features of Perl?
...nity wiki
3 revs, 2 users 92%moritz
2
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How to detect shake event with android?
...alues[SensorManager.DATA_X];
y = values[SensorManager.DATA_Y];
z = values[SensorManager.DATA_Z];
float speed = Math.abs(x+y+z - last_x - last_y - last_z) / diffTime * 10000;
if (speed > SHAKE_THRESHOLD) {
Log.d("sensor", "shake detected w/ speed: " + speed);
...
error LNK2019: 无法解析的外部符号 __imp__PlaySoundW@12，该符号在函数 \...
...uct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z) 中被引用#include <mmsystem.h>#pragma comment(lib, "WINMM.LIB")
#include <mmsystem.h>
#pragma comment(lib, "WINMM.LIB")
error LNK2019 PlaySound
Converting ISO 8601-compliant String to java.util.Date
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Unfortunately, the time zone formats available to SimpleDateFormat (Java 6 and earlier) are not ISO 8601 compliant. SimpleDateFormat understands time zone strings like "GMT+01:00" or "+0100", the latter according to RFC # 822.
Even if Java 7 added ...
Minimum and maximum date
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List all svn:externals recursively?
...n
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Rolling or sliding window iterator?
...stige
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answered Jul 25 '11 at 21:47
Daniel DiPaoloDaniel DiPaolo
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Whether a variable is undefined [duplicate]
...ottyUCSD
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In R, how to get an object's name after it is sent to a function?
...parse-substitute trick:
a<-data.frame(x=1:10,y=1:10)
test<-function(z){
mean.x<-mean(z$x)
nm <-deparse(substitute(z))
print(nm)
return(mean.x)}
test(a)
#[1] "a" ... this is the side-effect of the print() call
# ... you could have done something useful with that ...