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Cleaner way to do a null check in C#? [duplicate]
...ected override Expression VisitMember(MemberExpression node)
{
base.VisitMember(node);
if (CheckNull())
{
return node;
}
var member = (PropertyInfo)node.Member;
CurrentObject = member.GetValue(CurrentObject,null);
CheckNull();
...
Using “like” wildcard in prepared statement
I am using prepared statements to execute mysql database queries. And I want to implement a search functionality based on a keyword of sorts.
...
Why does Java have transient fields?
...
64
Your 'simple sentence' is merely a tautology. It explains nothing. You'd be better off without it.
– Marquis of Lorne...
Python timedelta in years
...ce some date. Assuming you want an integer number of years, you can guess based on 365.25 days per year and then check using either of the yearsago functions defined above::
def num_years(begin, end=None):
if end is None:
end = datetime.now()
num_years = int((end - begin).days / 36...
Why is MATLAB so fast in matrix multiplication?
...gt;> gputimeit(@()gA*gA)
ans =
0.0022
Update using R2018b on a WIN64 machine with 16 physical cores and a Tesla V100:
>> timeit(@()A*A)
ans =
0.0229
>> gputimeit(@()gA*gA)
ans =
4.8019e-04
(NB: at some point (I forget when exactly) gpuArray switched from MAGMA to cuBLA...
Java string to date conversion
...08; -0800; -08:00
Note that the patterns are case sensitive and that text based patterns of four characters or more represent the full form; otherwise a short or abbreviated form is used if available. So e.g. MMMMM or more is unnecessary.
Here are some examples of valid SimpleDateFormat patterns to...
Forward declaring an enum in C++
... variable. C++ Compiler's are allowed to specify the actual storage space based on the size necessary to contain all the values specified. If all that is visible is the forward declaration, the translation unit can't know what storage size will have been chosen - it could be a char or an int, or s...
dynamic_cast and static_cast in C++
...er for the cast to be legal.
Casts can go in one of two directions: from base to derived (B2D) or from derived to base (D2B). It's simple enough to see how D2B casts would work at runtime. Either ptr was derived from Type or it wasn't. In the case of D2B dynamic_cast<>s, the rules are sim...
Generator Expressions vs. List Comprehension
...1
dF.dF.
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How do I verify a method was called exactly once with Moq?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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