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Draw in Canvas by finger, Android
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Start By going through the Fingerpaint demo in the sdk sample.
Another Sample:
public class MainActivity extends Activity {
DrawingView dv ;
private Paint mPaint;
@Override
protected void onCreate(Bun...
C# 通过代码安装、卸载、启动、停止服务 - .NET(C#) - 清泛IT论坛，有思想、有深度
... // --Start Service
// service.Start();
}
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Ruby / Rails - Change the timezone of a Time, without changing the value
I have a record foo in the database which has :start_time and :timezone attributes.
11 Answers
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How to use QueryPerformanceCounter?
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#include <windows.h>
double PCFreq = 0.0;
__int64 CounterStart = 0;
void StartCounter()
{
LARGE_INTEGER li;
if(!QueryPerformanceFrequency(&li))
cout << "QueryPerformanceFrequency failed!\n";
PCFreq = double(li.QuadPart)/1000.0;
QueryPerformanceCount...
When should I use Inline vs. External Javascript?
...ng to send this portion down the wire, you can expect that the client will start receiving this somewhere around 5ms + latency after connecting to your server. Assuming the server is reasonably close this latency could be between 20ms to 60ms. Browsers will start processing this section as soon as t...
Current location permission dialog disappears too quickly
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Same symptom, different cause: do not to call startUpdatingLocation more than once in a row.
I had accidentally structured things such that the code was unintentionally calling startUpdatingLocation twice in a row, which is apparently bad. It might also have had somethi...
How to use Git?
...hat link is broken: Here is a link to another Git for Designers )
I would start at http://git-scm.com/documentation, there are documents and great video presentations for non-software-developer/cs users. Git for beginners have some basic stuff.
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Math.random() versus Random.nextInt(int)
... }
}
public static void main(String[] args) {
long start = System.currentTimeMillis();
usingRandomClass();
long end = System.currentTimeMillis();
System.out.println("usingRandomClass " + (end - start));
start = System.currentTimeMillis();
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Capitalize the first letter of both words in a two word string
...nction tries to achieve title case (which is something else than all words start with capital letter) by letting start all words with capital letters except a collection of English most likely exceptions (like e.g. c("all", "above", "after", "along", "also", "among", "any", "both", "can", "...
Show history of a file? [duplicate]
...duced if somebody has tweaked it over time, but that could give you a good start.
Finally, gitk as a GUI does show me the patch immediately for any commit I click on.
Example :
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