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Where does Java's String constant pool live, the heap or the stack?
I know the concept of a constants pool and the String constant pool used by JVMs to handle String literals. But I don't know which type of memory is used by the JVM to store String constant literals. The stack or the heap? Since its a literal which is not associated with any instance I would assume ...
sqlalchemy: how to join several tables by one query?
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You can print the query by leaving off the .all(). So print Session.query.... to see exactly what it is doing.
– boatcoder
Oct 20 '17 at 14:43
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How to locate the vimrc file used by vim editor?
...e: "$HOME/.gvimrc"
system menu file: "$VIMRUNTIME/menu.vim"
As noted by Herbert in comments, this is where vim looks for vimrcs, it doesn't mean they exist.
You can check the full path of your vimrc with
:echo $MYVIMRC
If the output is empty, then your vim doesn't use a user vimrc (just cr...
How to create json by JavaScript for loop?
...t, this should work:
<script>
// var status = document.getElementsByID("uniqueID"); // this works too
var status = document.getElementsByName("status")[0];
var jsonArr = [];
for (var i = 0; i < status.options.length; i++) {
jsonArr.push({
id: status.options[i].text,
...
How does Spring autowire by name when more than one matching bean is found?
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Fine-tuning annotation-based autowiring with qualifiers
Since autowiring by type may lead to multiple candidates, it is often necessary to have more control over the selection process. One way to accomplish this is with Spring's @Qualifier annotation. This allows for associating qualifier values w...
How to filter by IP address in Wireshark?
...ost 192.168.1.101
Wireshark will only capture packet sent to or received by 192.168.1.101. This has the benefit of requiring less processing, which lowers the chances of important packets being dropped (missed).
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When to use an assertion and when to use an exception
... check something that might happen.
For example, a function might divide by 0, so an exception should be used, but an assertion could be used to check that the harddrive suddenly disappears.
An assertion would stop the program from running, but an exception would let the program continue running...
What exactly does @synthesize do?
...May 29 '13 at 19:23
Reuben Mallaby
5,55244 gold badges4444 silver badges4242 bronze badges
answered Jul 16 '10 at 15:37
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How to calculate the CPU usage of a process by PID in Linux from C?
..., and /proc/<PID>/stat tells you how many jiffies have been executed by a single process.
– caf
Sep 15 '09 at 6:21
1
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Create a pointer to two-dimensional array
..., i don't quite understand you. the storage in all these cases is provided by the array l_matix itself. The pointers to them take storage from where-ever they are declared in and as (stack, static data segment, ...).
– Johannes Schaub - litb
Jun 27 '09 at 19:32...