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A JRE or JDK must be available in order to run Eclipse. No JVM was found after searching the followi
...nstaller continued and also Eclipse was able to start flawlessly without those two lines in eclipse.ini.
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Remove rows with all or some NAs (missing values) in data.frame
...mptions --------------------
fakeData <- function(m, n, p){
set.seed(123)
m <- matrix(runif(m*n), nrow=m, ncol=n)
m[m<p] <- NA
return(m)
}
df <- cbind( data.frame(id = paste0('ID',seq(row_size)),
stringsAsFactors = FALSE),
data.frame(fak...
Detect if Android device has Internet connection
...User-Agent", "Test");
urlc.setRequestProperty("Connection", "close");
urlc.setConnectTimeout(1500);
urlc.connect();
return (urlc.getResponseCode() == 200);
} catch (IOException e) {
Log.e(LOG_TAG, "Error checking internet connectio...
HTTP status code for update and delete?
...atus code is the request sent by the client is valid (DELETE mySite/entity/123) and the entity to delete does not exist.
– Martin
Dec 30 '11 at 21:27
69
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How do I print a double value without scientific notation using Java?
...
123
You could use printf() with %f:
double dexp = 12345678;
System.out.printf("dexp: %f\n", dexp)...
How to check if a process id (PID) exists
...kill to just check if a signal could be sent to the process, which is for most purposes more or less equivalent to checking if it exists. See linux.die.net/man/2/kill and linux.die.net/man/7/signal
– Christoffer Hammarström
Jun 15 '10 at 10:58
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PHP Session Security
...as to change during the session use, it would be extremely suspicious and most likely an attack. I never said you can use it alone. If you combine it with the other techniques you have a much more secure site.
– grom
Apr 27 '10 at 23:42
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Why implement interface explicitly?
...
Michael BMichael B
7,21233 gold badges2424 silver badges5252 bronze badges
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How to check if Location Services are enabled?
I'm developing an app on Android OS. I don't know how to check if Location Services are enabled or not.
22 Answers
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How big can a MySQL database get before performance starts to degrade
At what point does a MySQL database start to lose performance?
15 Answers
15
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