大约有 16,000 项符合查询结果（耗时：0.0361秒） [XML]
throwing exceptions out of a destructor
...estructor - doing so results in undefined behavior. Stroustrup makes the point that "the vector destructor explicitly invokes the destructor for every element. This implies that if an element destructor throws, the vector destruction fails... There is really no good way to protect against exception...
User Authentication in ASP.NET Web API
...henticated(string role)
{
string[] parts = UTF8Encoding.UTF8.GetString(Convert.FromBase64String(Request.Headers.Authorization.Parameter)).Split(':');
if (parts.Length != 2 || !Membership.ValidateUser(parts[0], parts[1]))
throw new HttpResponseException(Request.CreateErrorResponse(Htt...
Entity framework code-first null foreign key
...
You must make your foreign key nullable:
public class User
{
public int Id { get; set; }
public int? CountryId { get; set; }
public virtual Country Country { get; set; }
}
share
|
im...
Jaxb, Class has two properties of the same name
with jaxb, i try to read an xml file
only a few element in xml file are interesting, so i would like to skip many element
2...
In what cases do I use malloc and/or new?
...ree and malloc/delete.
Note: Some answers in this question are invalid.
int* p_scalar = new int(5); // Does not create 5 elements, but initializes to 5
int* p_array = new int[5]; // Creates 5 elements
share
|...
Clicking the back button twice to exit an activity
...ive such as;
What's wrong with measuring time passed and checking if TIME_INTERVAL miliseconds (say 2000) passed since the last back press. The following sample code uses System.currentTimeMillis(); to store the time onBackPressed() is called;
private static final int TIME_INTERVAL = 2000; // # mi...
PendingIntent does not send Intent extras
My MainActicity starts RefreshService with a Intent which has a boolean extra called isNextWeek .
3 Answers
...
Using setImageDrawable dynamically to set image in an ImageView
...
Try this,
int id = getResources().getIdentifier("yourpackagename:drawable/" + StringGenerated, null, null);
This will return the id of the drawable you want to access...
then you can set the image in the imageview by doing the follow...
What is meant by Scala's path-dependent types?
...
My favorite example:
case class Board(length: Int, height: Int) {
case class Coordinate(x: Int, y: Int) {
require(0 <= x && x < length && 0 <= y && y < height)
}
val occupied = scala.collection.mutable.Set[Coordinate]()
}
...
How do I clear this setInterval inside a function?
Normally, I’d set the interval to a variable and then clear it like var the_int = setInterval(); clearInterval(the_int); but for my code to work I put it in an anonymous function:
...