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Callback functions in C++
...cks. For example the for_each algorithm applies an unary callback to every item in a range of iterators:
template<class InputIt, class UnaryFunction>
UnaryFunction for_each(InputIt first, InputIt last, UnaryFunction f)
{
for (; first != last; ++first) {
f(*first);
}
return f;
}
wh...
What should Xcode 6 gitignore file include?
...ifferent Xcode & Cocoapods .gitignore files and this one seems to work best for me. The Pods folder is rightly ignored, since it is a generated end-state. Also, the Podfile.lock file is included, which provides valuable metadata about the state of a build during various commits.
...
What is the canonical way to check for errors using the CUDA runtime API?
...stError , cudaPeekAtLastError , and cudaGetErrorString , but what is the best way to put these together to reliably catch and report errors without requiring lots of extra code?
...
How to use NULL or empty string in SQL
...
my best solution :
WHERE
COALESCE(char_length(fieldValue), 0) = 0
COALESCE returns the first non-null expr in the expression list().
if the fieldValue is null or empty string then: we will return the second element then...
Algorithm for creating a school timetable
...pert systems aside, this is a field where genetic algorithms are among the best bets. The difficulty does not lie in solving the problem, not only. The difficulty also lies in stating the problem and its constraints.
– Stefano Borini
Feb 2 '10 at 10:53
...
Compare two objects and find the differences [duplicate]
what is the best way to compare two objects and find the differences?
2 Answers
2
...
Redis strings vs Redis hashes to represent JSON: efficiency?
...red","age":25}'
SADD users {id}
Generally speaking, this is probably the best method in most cases. If there are a lot of fields in the Object, your Objects are not nested with other Objects, and you tend to only access a small subset of fields at a time, it might be better to go with option 2.
A...
Bootstrap 3 Slide in Menu / Navbar on Mobile [closed]
...position: relative
}
/* un fix the navbar when active so that all the menu items are accessible */
.navbar.navbar-fixed-top.slide-active {
position: relative
}
/* screw writing importants and shit, just stick it in max width since these classes are not shared between sizes */
@media (max-width:7...
Catching an exception while using a Python 'with' statement
...
The best "Pythonic" way to do this, exploiting the with statement, is listed as Example #6 in PEP 343, which gives the background of the statement.
@contextmanager
def opened_w_error(filename, mode="r"):
try:
f = ope...
Should a Netflix or Twitter-style web service use REST or SOAP? [closed]
...clients (and servers) are supposed to react when they see elements or data items that don't match the spec. JPEG, for example has an Application-specific record type (e.g. APP1) which is used to contain all sorts of meta data.
"I've heard the complaint that with SOAP you have the "overhead" of the ...