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Evaluate empty or null JSTL c tags
...r a bunch of tags and thus you could only check it inside a tag attribute, then you can use the EL conditional operator ${condition? valueIfTrue : valueIfFalse}:
<c:out value="${empty var1 ? 'var1 is empty or null' : 'var1 is NOT empty or null'}" />
To learn more about those ${} things (the E...
Can't open config file: /usr/local/ssl/openssl.cnf on Windows [duplicate]
... trick:
set OPENSSL_CONF=C:\wamp\bin\apache\Apache2.4.4\conf\openssl.cnf
then execute the rest codes..
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Difference between ProcessBuilder and Runtime.exec()
...umed to be an individual argument. Either way, the arguments obtained are then joined up into a string that is passed to the OS to execute.
So, for example, on Windows,
Runtime.getRuntime().exec("C:\DoStuff.exe -arg1 -arg2");
will run a DoStuff.exe program with the two given arguments. In this...
How can you find out which process is listening on a port on Windows?
...
and taskkill /PID <pid> to then terminate the process, using /F if appropriate.
– BitMask777
Mar 4 '13 at 20:03
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Best approach for GPGPU/CUDA/OpenCL in Java?
...DA is a modification of C, to write CUDA kernel you have to code in C, and then compile to executable form with nvidia's CUDA compiler. Produced native code could then be linked with Java using JNI. So technically you can't write kernel code from Java. There is JCUDA http://www.jcuda.de/jcuda/JCuda....
Get value of a string after last slash in JavaScript
...f characters not containing a slash" ([^/]*) at the end of the string ($). Then it grabs the matched characters from the returned match object by indexing into it ([0]); in a match object, the first entry is the whole matched string. No need for capture groups.
Live example
Using lastIndexOf and s...
Why is Hibernate Open Session in View considered a bad practice?
...ervice layer that will return your dto. If you face a performance problem, then you should optimize that specific issue with a smarter query or a more lightweight dto. If you have to develop too many service methods to handle possibilities you could need in the view, you are also 'polluting' the se...
javac : command not found
...o the "Files" section) and see that there is no javac in that package. and then look at the OpenJDK Development Environment package.
– ax.
Mar 23 '11 at 15:55
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Does return stop a loop?
...e people, but this is so good know because you no longer have to break and then return.
– NoName
Oct 17 '19 at 22:12
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return statement vs exit() in main()
...urn just makes the code more confusing. OTOH, if you really do mean exit, then by all means use it.
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