大约有 40,000 项符合查询结果（耗时：0.0830秒） [XML]
In Python, what happens when you import inside of a function? [duplicate]
...le-level means each use of goo.this, goo.that, etc, is two dict lookups -- one for goo and one for the attribute name. Having it be "function level" pays one extra local-variable setting per run of the function (even faster than the dictionary lookup part!) but saves one dict lookup (exchanging it ...
How does BLAS get such extreme performance?
...ning the library by hand for your particular machine then using a prebuilt one.)
share
|
improve this answer
|
follow
|
...
Why are primes important in cryptography?
One thing that always strikes me as a non-cryptographer: Why is it so important to use Prime numbers? What makes them so special in cryptography?
...
Why do we declare Loggers static final?
... - so that no other class can hijack your logger
static - so there is only one logger instance per class, also avoiding attempts to serialize loggers
final - no need to change the logger over the lifetime of the class
Also, I prefer name log to be as simple as possible, yet descriptive.
EDIT: How...
How do I move a file (or folder) from one folder to another in TortoiseSVN?
I would like to move a file or folder from one place to another within the same repository without having to use Repo Browser to do it, and without creating two independent add/delete operations. Using Repo Browser works fine except that your code will be hanging in a broken state until you get any...
Are there any downsides to passing structs by value in C, rather than passing a pointer?
... passing by value is perfectly acceptable. But, apart from speed, there is one other reason why you should be careful passing/returning large structs by value: Stack space.
A lot of C programming is for embedded systems, where memory is at a premium, and stack sizes may be measured in KB or even By...
How to pick just one item from a generator?
...ay also be used to avoid the StopIteration exception. For example next(g, None) for a generator of strings will either yield a string or None after the iteration was finished.
– Attila
Mar 6 '13 at 14:18
...
Java - escape string to prevent SQL injection
...ny way.
There are different set methods for different data types -- which one you use depends on what your database fields are. For example, if you have an INTEGER column in the database, you should use a setInt method. The PreparedStatement documentation lists all the different methods available...
Android: how to handle button click
...
Question 1:
Unfortunately the one in which you you say is most intuitive is the least used in Android. As I understand, you should separate your UI (XML) and computational functionality (Java Class Files). It also makes for easier debugging. It is actuall...
How to check if PHP array is associative or sequential?
... all arrays as associative, so there aren't any built in functions. Can anyone recommend a fairly efficient way to check if an array contains only numeric keys?
...