大约有 48,000 项符合查询结果（耗时：0.0572秒） [XML]
Why aren't pointers initialized with NULL by default?
...
We all realize that pointer (and other POD types) should be initialized.
The question then becomes 'who should initialize them'.
Well there are basically two methods:
The compiler initializes them.
The developer initializes them.
Let us assume tha...
How do I create an empty array/matrix in NumPy?
...t I would normally use a list. I want to create an empty array (or matrix) and then add one column (or row) to it at a time.
...
How to specify function types for void (not Void) methods in Java8?
...e Function is not appropriate in this case because it receives a parameter and has a return value. Instead you should use Consumer (formerly known as Block)
The Function type is declared as
interface Function<T,R> {
R apply(T t);
}
However, the Consumer type is compatible with that you ...
Why C# fails to compare two object types with each other but VB doesn't?
I have two objects in C# and don't know if it's Boolean or any other type.
However when I try to compare those C# fails to give the right answer.
I have tried the same code with VB.NET and that did it !
...
Is there any way to put malicious code into a regular expression?
...ological patterns that go exponential — or even super‐exponential! — and so appear to take forever to solve. These may only show up on particular input data, but one can generally create one wherein this doesn’t matter.
Which ones these are will depend somewhat on how smart the regex compil...
Detecting request type in PHP (GET, POST, PUT or DELETE)
...
+1 to that - when in doubt, var_dump($_SERVER) and the answer often lies within.
– Paul Dixon
Dec 11 '08 at 11:35
10
...
Comparing Haskell's Snap and Yesod web frameworks
The two Haskell web frameworks in the news recently are Yesod (at 0.8) and Snap (at 0.4).
4 Answers
...
How do I check if a Sql server string is null or empty
...ompany.Offer_Text) AS Offer_Text
FROM ...
is the most elegant solution.
And to break it down a bit in pseudo code:
// a) NULLIF:
if (listing.Offer_Text == '')
temp := null;
else
temp := listing.Offer_Text; // may now be null or non-null, but not ''
// b) ISNULL:
if (temp is null)
result :=...
How to affect other elements when one element is hovered
...ral sibling combinator ~ for 'cube is somewhere after container in the DOM and shares a parent'
– robertc
Dec 21 '10 at 18:50
...
Why is my git repository so big?
... pulled the wrong remote repository into the local one (git remote add ... and git remote update). After deleting the unwanted remote ref, branches and tags I still had 1.4GB (!) of wasted space in my repository. I was only able to get rid of this by cloning it with git clone file:///path/to/repos...