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Stopping scripters from slamming your website
...at does the design, writes the product descriptions, podcasts, blog posts, and moderates the forums. I work with CSS/HTML and am only barely familiar with other technologies. I work closely with the developers and have talked through all of the answers here (and many other ideas we've had).
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Which is the best library for XML parsing in java [closed]
I'm searching the java library for parsing XML (complex configuration and data files), I googled a bit but couldn't found other than dom4j (Seems like they are working on V2).. I have taken look at commons configuration but didn't like it, Other apache projects on XML seems under hibernation. I have...
Why is String immutable in Java?
...it were mutable, these parameters could be easily changed.
Synchronization and concurrency: making String immutable automatically makes them thread safe thereby solving the synchronization issues.
Caching: when compiler optimizes your String objects, it sees that if two objects have same value (a="...
SQL Server IN vs. EXISTS Performance
...t. The IN statement requires SQL Server to generate a complete result set, and then create a big IF statement I think.
– Randy Minder
Jan 14 '10 at 16:04
74
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Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
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Here's a summary of Dimitris Andreou's link.
Remember sum of i-th powers, where i=1,2,..,k. This reduces the problem to solving the system of equations
a1 + a2 + ... + ak = b1
a12 + a22 + ... + ak2 = b2
...
a1k + a2k + ... + akk = bk
Using Newton's...
Understanding checked vs unchecked exceptions in Java
...ethrow) should not be used at all. They were eliminated in C# for example, and most languages don't have them. So you can always throw a subclass of RuntimeException (unchecked exception)
However, I think checked exceptions are useful - they are used when you want to force the user of your API to t...
Elegant solution to duplicate, const and non-const, getters? [duplicate]
...e member function calling it is non-const, the object itself is non-const, and casting away the const is allowed.
class Foo
{
public:
const int& get() const
{
//non-trivial work
return foo;
}
int& get()
{
return const_cast<int&>(const_c...
What's the difference between an argument and a parameter?
...ng else. Either way the other people know what I mean, but what's correct, and what's the history of the terms?
34 Answers
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Cosmic Rays: what is the probability they will affect a program?
Once again I was in a design review, and encountered the claim that the probability of a particular scenario was "less than the risk of cosmic rays" affecting the program, and it occurred to me that I didn't have the faintest idea what that probability is.
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What techniques can be used to speed up C++ compilation times?
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Language techniques
Pimpl Idiom
Take a look at the Pimpl idiom here, and here, also known as an opaque pointer or handle classes. Not only does it speed up compilation, it also increases exception safety when combined with a non-throwing swap function. The Pimpl idiom lets you reduce the depen...