大约有 16,000 项符合查询结果（耗时：0.0412秒） [XML]
Append TimeStamp to a File Name
...e_" + DateTime.Now.ToFileTime() + ".txt";
What does ToFileTime() do?
Converts the value of the current DateTime object to a Windows file time.
public long ToFileTime()
A Windows file time is a 64-bit value that represents the number of 100-nanosecond intervals that have elapsed sinc...
What is the difference between memmove and memcpy?
...n fact, have overlap (or more generally, access the restricted data from pointer derived from multiple places), the behavior of the program is undefined, weird bugs will happen, and the compiler will usually not warn you about it.
– bdonlan
Feb 9 '15 at 6:34
...
Avoiding SQL injection without parameters
...weird. The parser is capable of identifying constants in the text and can convert the SQL string to one the uses parameters artificially. It can then insert into the cache the text of this new parameterised query. Subsequent similar SQL may find its parameterised version matched in the cache. Ho...
How to know if other threads have finished?
...ompleted.
How to implement Idea #5? Well, one way is to first create an interface:
public interface ThreadCompleteListener {
void notifyOfThreadComplete(final Thread thread);
}
then create the following class:
public abstract class NotifyingThread extends Thread {
private final Set<T...
How do you dynamically add elements to a ListView on Android?
...; adapter;
//RECORDING HOW MANY TIMES THE BUTTON HAS BEEN CLICKED
int clickCounter=0;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
adapter=new ArrayAdapter<String>(this,
android.R.la...
How to compare strings ignoring the case
...) == 0
"Apple".casecmp("APPLE") == 0
#=> true
Alternatively, you can convert both strings to lower case (str.downcase) and compare for equality.
share
|
improve this answer
|
...
Pandas every nth row
...
I'd use iloc, which takes a row/column slice, both based on integer position and following normal python syntax.
df.iloc[::5, :]
share
|
improve this answer
|
...
How to create a colored 1x1 UIImage on the iPhone dynamically?
...with color: UIColor) -> UIImage {
let rect = CGRect(origin: CGPoint(x: 0, y:0), size: CGSize(width: 1, height: 1))
UIGraphicsBeginImageContext(rect.size)
let context = UIGraphicsGetCurrentContext()!
context.setFillColor(color.cgColor)
context.fill(rect)
...
What effect(s) can the virtual keyword have in Entity Framework 4.1 POCO Code First?
...ion<T> only.
They cannot be a concrete
implementation or another interface
that derives from ICollection<T> (a
difference from the Deferred Loading
proxy)
Another useful link describing this is MSDN's Requirements for Creating POCO Proxies.
...
How to get std::vector pointer to the raw data?
...> requires the use of a proxy object and that proxy can't be implicitly converted to a bool*. As the workaround for this, if you do need a sequence of bool, it's best just to use a std::vector<char>. @Motti
– James McNellis
Jun 26 '11 at 23:38
...