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Javascript: How to loop through ALL DOM elements on a page?
I'm trying to loop over ALL elements on a page, so I want to check every element that exists on this page for a special class.
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C++11 rvalues and move semantics confusion (return statement)
...equivalent to your first. The std::move on tmp is unnecessary and can actually be a performance pessimization as it will inhibit return value optimization.
The best way to code what you're doing is:
Best practice
std::vector<int> return_vector(void)
{
std::vector<int> tmp {1,2,3,4,5...
What is a patch in git version control?
...as another concrete example.
Nowadays, the GitHub pull request makes it really easy to apply patches on GitHub repos, which is useful when you aren't a direct contributor (ie you have no right to directly push to a repo).
Actually, fairly recently GitHub introduced "Better Pull Request Emails" to i...
Scala Doubles, and Precision
...igDecimal:
BigDecimal(1.23456789).setScale(2, BigDecimal.RoundingMode.HALF_UP).toDouble
There are a number of other rounding modes, which unfortunately aren't very well documented at present (although their Java equivalents are).
...
Easiest way to activate PHP and MySQL on Mac OS 10.6 (Snow Leopard), 10.7 (Lion), 10.8 (Mountain Lio
...c/apache2/libphp5.so"
And uncomment it (remove the #).
Download and install the latest MySQL version from mysql.com. Choose the x86_64 version for Intel (unless your Intel Mac is the original Macbook Pro or Macbook, which are not 64 bit chips. In those cases, use the 32 bit x86 version).
Install...
When is an interface with a default method initialized?
...ough to trigger the initialization. The default method doesn't have to be called or overridden or even mentioned, nor does the presence of an abstract method trigger initialization.
My speculation is that the HotSpot implementation wanted to avoid adding class/interface initialization checking into...
What is the purpose of flush() in Java streams?
...Java, flush() method is used in streams. But I don't understand what are all the purpose of using this method?
6 Answers
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Converting pixels to dp
... Its funny how the answer is more helpful when it doesn't really answer the question -_- I thought I wanted what the question asked then I realized I didn't! So great answer. I do have a question. How can I obtain the last paramter for applyDimension? Can I just do getResource().getDi...
Curious null-coalescing operator custom implicit conversion behaviour
...l; there's no need to check it for null a second time just because we are calling a lifted conversion operator". We'd them optimize it away to just
new int?(op_Implicit(temp2.Value))
My guess is that we are somewhere caching the fact that the optimized form of (int?)Foo() is new int?(op_implici...
Why are hexadecimal numbers prefixed with 0x?
...an immediately tell the base (0 is the same in both bases),
it's mathematically sane (00005 == 05), and
no precious special characters are needed (as in #123).
When C was created from B, the need for hexadecimal numbers arose (the PDP-11 had 16-bit words) and all of the points above were still val...