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What does “atomic” mean in programming?
...;
Or to synchronize every access to the variable:
public synchronized void setFoo(long value) {
this.foo = value;
}
public synchronized long getFoo() {
return this.foo;
}
// no other use of foo outside of these two methods, unless also synchronized
Or to replace it with an AtomicLong:
...
SQL Server - transactions roll back on error?
...)
DECLARE @ErrorState INT = ERROR_STATE()
-- Use RAISERROR inside the CATCH block to return error
-- information about the original error that caused
-- execution to jump to the CATCH block.
RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState);
END CATCH
...
How can I merge two commits into one if I already started rebase?
...s, a was the first commit, then b, and finally c. After committing c we decide to squash b and c together:
(Note: Running git log pipes its output into a pager, less by default on most platforms. To quit the pager and return to your command prompt, press the q key.)
Running git rebase --interactiv...
What is the difference between .map, .every, and .forEach?
... returns a boolean - true if every element in this array satisfies the provided testing function. An important difference with .every() is that the test function may not always be called for every element in the array. Once the testing function returns false for any element, no more array elements...
Chrome Dev Tools - “Size” vs “Content”
...
@NiCkNewman Yes Size is the actual data size (not bandwidth btw) across the wire (Headers+Content combined). Content is the size of the inflated, uncompressed Content (e.g. if it was gziped) only (Headers excluded!).
– Israel
May 24 '15 at 1...
Difference between solr and lucene
...search capability to our application. It exposes an easy-to-use API while hiding all the search-related complex operations. Any application can use this library, not just Solr.
3) Solr is built around Lucene. It is not just an http-wrapper around Lucene but has been known to add more arsenal to Luc...
Why do people use __(double underscore) so much in C++
... C++, Rules and Recommendations :
The use of two underscores (`__') in identifiers is reserved for the compiler's internal use according to the ANSI-C standard.
Underscores (`_') are often used in names of library functions (such as "_main" and "_exit"). In order to avoid collisions, do not...
How to get exit code when using Python subprocess communicate method?
...the child was terminated by signal N (Unix only).
So you can just do (I didn't test it but it should work):
import subprocess as sp
child = sp.Popen(openRTSP + opts.split(), stdout=sp.PIPE)
streamdata = child.communicate()[0]
rc = child.returncode
(*) This happens because of the way it's impl...
What is this crazy C++11 syntax ==> struct : bar {} foo {};?
...e a bog-standard abstract UDT (User-Defined Type):
struct foo { virtual void f() = 0; }; // normal abstract type
foo obj;
// error: cannot declare variable 'obj' to be of abstract type 'foo'
Let's also recall that we can instantiate the UDT at the same time that we define it:
struct foo { foo() ...
How to commit no change and new message?
...documentation.
While the tree object (which has a hash of its own) will be identical, the commit will actually have a different hash, because it will presumably have a different timestamp and message, and will definitely have a different parent commit. All three of those factors are integrated into ...