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Why are variables “i” and “j” used for counters?
... real. This meant that I was the first integer variable, and J the second, etc., so they fell towards use in loops.
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answered Nov 9 '10 at 19:48
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Practical uses for AtomicInteger
...two main uses of AtomicInteger:
As an atomic counter (incrementAndGet(), etc) that can be used by many threads concurrently
As a primitive that supports compare-and-swap instruction (compareAndSet()) to implement non-blocking algorithms.
Here is an example of non-blocking random number generator...
Rails: where does the infamous “current_user” come from?
...requisites to using current_user (like the existence of sessions, users, etc)?
2 Answers
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mysqli or PDO - what are the pros and cons? [closed]
...nted aspect, the prepared statements, the fact that it becomes a standard, etc. But I know that most of the time, convincing somebody works better with a killer feature. So there it is:
A really nice thing with PDO is you can fetch the data, injecting it automatically in an object. If you don't wan...
What's to stop malicious code from spoofing the “Origin” header to exploit CORS?
...calls, sending expensive emails, sending even more expensive sms messages, etc.). When that was done, the server happily sent the spoofed Access-Control-Allow-Origin header back to the browser.
The documentation I've read states that the Access-Control-Allow-Origin value received must match the Ori...
How does a debugger work?
...rface Access SDK.
If you are debugging a managed environment (.NET, Java, etc.) the process will typically look similar, but the details are different, as the virtual machine environment provides the debug API rather than the underlying OS.
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What did MongoDB not being ACID compliant before v4 really mean?
...pdate (in memory), wait for the write to happen to the local journal file, etc.
There is no easy "atomic" updates to multiple collections and even multiple documents in the same collection. It's not a problem in most cases because it can be circumvented with Two Phase Commit, or restructuring your s...
How to disable Google Chrome auto update?
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Editing /etc/hosts and pointing tools.google.com to 127.0.0.1 also works, and doesn't require restarting Chrome.
– Throw Away Account
Feb 27 '18 at 2:27
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How can I get a resource content from a static context?
...d named mContext and create a static method that returns this field, e.g. getContext():
This is how it should look:
public class App extends Application{
private static Context mContext;
@Override
public void onCreate() {
super.onCreate();
mContext = this;
}
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Python: Get relative path from comparing two absolute paths
...r/var/')
PosixPath('log')
>>> Path('/usr/var/log').relative_to('/etc/')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/pathlib.py", line 851, in relative_to
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