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How to convert nanoseconds to seconds using the TimeUnit enum?
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Well, you could just divide by 1,000,000,000:
long elapsedTime = end - start;
double seconds = (double)elapsedTime / 1_000_000_000.0;
If you use TimeUnit to convert, you'll get your result as a long, so you'll lose decimal precision but maintain whole number precision.
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Why is there an “Authorization Code” flow in OAuth2 when “Implicit” flow works so well?
...and would slow adoption down tremendously. This is why an intermediary one-time-use "authorization code" is provided that only the legitimate receiver will be able to exchange (because you need the client secret) and that the code will be useless to potential hackers intercepting the requests over u...
set DateTime to start of month
How can I set a DateTime to the first of the month in C#?
9 Answers
9
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Do try/catch blocks hurt performance when exceptions are not thrown?
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This is not true at all, Think of it. How many times that you use try catch in a loop? Most of the time you will use loop in a try.c
– Athiwat Chunlakhan
Aug 29 '09 at 20:10
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How to get the current time in YYYY-MM-DD HH:MI:Sec.Millisecond format in Java?
The code below gives me the current time. But it does not tell anything about milliseconds.
15 Answers
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What is the best way to do a substring in a batch file?
... - expands %I to file attributes of file
%~tI - expands %I to date/time of file
%~zI - expands %I to size of file
%~$PATH:I - searches the directories listed in the PATH
environment variable and expands %I to the
fully qualified name of the first one fo...
Print “hello world” every X seconds
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You can also take a look at Timer and TimerTask classes which you can use to schedule your task to run every n seconds.
You need a class that extends TimerTask and override the public void run() method, which will be executed everytime you pass an inst...
How to get the start time of a long-running Linux process?
Is it possible to get the start time of an old running process? It seems that ps will report the date (not the time) if it wasn't started today, and only the year if it wasn't started this year. Is the precision lost forever for old processes?
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How I can I lazily read multiple JSON values from a file/stream in Python?
... like to read multiple JSON objects from a file/stream in Python, one at a time. Unfortunately json.load() just .read() s until end-of-file; there doesn't seem to be any way to use it to read a single object or to lazily iterate over the objects.
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In Python, how do I read the exif data for an image?
...d:
return v
exif = image._getexif()
print get_field(exif,'ExposureTime')
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