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Quickly find whether a value is present in a C array?
... up wasting lots of time tuning the output that way. Compilers (especially from Microsoft) have come a long way in the last few years, but they are still not as smart as the compiler between your ears because you're working on your specific situation and not just a general case. The compiler may not...
Java serialization: readObject() vs. readResolve()
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readResolve is used for replacing the object read from the stream. The only use I've ever seen for this is enforcing singletons; when an object is read, replace it with the singleton instance. This ensures that nobody can create another instance by serializing and deserializ...
Fastest way to determine if an integer's square root is an integer
...the classical way.
// The correctness is not trivial as the conversion from long to double is lossy!
final long tst = (long) Math.sqrt(x);
return tst * tst == x;
}
The first test catches most non-squares quickly. It uses a 64-item table packed in a long, so there's no array access cost ...
What exactly is a reentrant function?
Most of the times , the definition of reentrance is quoted from Wikipedia :
7 Answers
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How can I detect when an Android application is running in the emulator?
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This is what I had to update to after using the answer from @Aleadam for quite awhile (it stopped working for me).
– ckbhodge
Jul 8 '16 at 10:20
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Import and Export Excel - What is the best library? [closed]
...- export becomes irrelevant with SpreadsheetML. The data is all accessible from within the file. If you need the data in a different format, provide a transform via an XSLT or via Linq.
– Todd Main
Apr 28 '10 at 6:23
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What is the difference between procedural programming and functional programming? [closed]
...;
# in this case it is rather pointless as
# it can't even be accessed from outside
my $result = 1;
loop ( ; $n > 0 ; $n-- ){
$result *= $n;
}
return $result;
}
D 2
int factorial( int n ){
int result = 1;
for( ; n > 0 ; n-- ){
result *= n;
}
return result...
make_unique and perfect forwarding
...an simply be a class instead of function. For example, see my blog article from May 2010. It's also linked to from the discussion on Herb's blog.
– Cheers and hth. - Alf
May 12 '12 at 13:42
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How to tell if a tag failed to load
...it should be ok to only support this on next gen browsers for KISS IMHO).
From the spec:
If the src attribute's value is the
empty string or if it could not be
resolved, then the user agent must
queue a task to fire a simple event
named error at the element, and
abort these steps.
~...
What Makes a Method Thread-safe? What are the rules?
...ly not. You can write a program with only a single local variable accessed from a single thread that is nevertheless not threadsafe:
https://stackoverflow.com/a/8883117/88656
Does that apply for static methods as well?
Absolutely not.
One answer, provided by @Cybis, was: "Local variables ...