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Is gcc 4.8 or earlier buggy about regular expressions?
...lt;iostream>
int main() {
const std::regex regex(".*");
const std::string string = "This should match!";
const auto result = std::regex_search(string, regex);
#if HAVE_WORKING_REGEX
std::cerr << "<regex> works, look: " << std::boolalpha << result << std::end...
Get a filtered list of files in a directory
...ead for very large data sets, but for listing a directory and other simple string filtering tasks, list comprehensions lead to more clean documentable code.
The only thing about this design is that it doesn't protect you against making the mistake of passing a string instead of a list. For example...
Is Java “pass-by-reference” or “pass-by-value”?
... easily confuse many beginners.
It goes like this:
public static void main(String[] args) {
Dog aDog = new Dog("Max");
Dog oldDog = aDog;
// we pass the object to foo
foo(aDog);
// aDog variable is still pointing to the "Max" dog when foo(...) returns
aDog.getName().equals("...
How to make a chain of function decorators?
...udes the function functools.wraps(), which copies the name, module, and docstring of the decorated function to its wrapper.
(Fun fact: functools.wraps() is a decorator! ☺)
# For debugging, the stacktrace prints you the function __name__
def foo():
print("foo")
print(foo.__name__)
#outputs:...
Service Reference Error: Failed to generate code for the service reference
...s parameters inside it are of type System.Guid, they will be translated to strings in the generated client if the reuse types option is disabled.
An alternative that I prefer to disabling reusing types is to add the service reference from Class Library project specifically created for that purpose....
What is the difference between Scala's case class and class?
... the class, use case class. Otherwise use classes and also mentioning some extra perks like equals and hash code overriding. But are these the only reasons why one should use a case class instead of class?
...
sql “LIKE” equivalent in django query
..._contains or __icontains (case-insensitive):
result = table.objects.filter(string__contains='pattern')
The SQL equivalent is
SELECT ... WHERE string LIKE '%pattern%';
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What to do Regular expression pattern doesn't match anywhere in string?
...lt;quote>
}{$+{BODY}}six;
return $_;
}
sub descape {
my $string = $_[0];
for my $_ ($string) {
s{
(?<! % )
% ( \p{Hex_Digit} {2} )
}{
chr hex $1;
}gsex;
s{
& \043
( [0-9]+ )
...
Efficiency of purely functional programming
... for problems that require a greater running time, it is possible that the extra O(log n) factor seen in the linear problem may be able to be "absorbed" in the process of extra operations necessary for algorithms with greater running times. These clarifications and open questions are explored briefl...
Convert integer into byte array (Java)
... BigInteger.valueOf(0xAABBCCDD).toByteArray();
System.out.println(Arrays.toString(array))
// --> {-86, -69, -52, -35 }
The returned array is of the size that is needed to represent the number, so it could be of size 1, to represent 1 for example. However, the size cannot be more than four byte...