大约有 16,000 项符合查询结果（耗时：0.0380秒） [XML]
How do I get the current line number?
...oo");
}
...
static void ShowMessage(string message,
[CallerLineNumber] int lineNumber = 0,
[CallerMemberName] string caller = null)
{
MessageBox.Show(message + " at line " + lineNumber + " (" + caller + ")");
}
This will display, for example:
Boo at line 39 (SomeMethodSomewhere)
Ther...
What's the best way to iterate over two or more containers simultaneously
...range: a function with one line of code is all I need. However, I would be interested if the performance of boost ranges is optimal as well.
– SebastianK
Nov 6 '14 at 15:45
...
Why do I need to override the equals and hashCode methods in Java?
...therField() {
return anotherField;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((importantField == null) ? 0 : importantField.hashCode());
return result;
}
@Override
...
Preferred Java way to ping an HTTP URL for availability
...way is using java.net.Socket.
public static boolean pingHost(String host, int port, int timeout) {
try (Socket socket = new Socket()) {
socket.connect(new InetSocketAddress(host, port), timeout);
return true;
} catch (IOException e) {
return false; // Either timeout ...
How to document a string type in jsdoc with limited possible values
...on of the tooltip
* @param {String='up','down','left','right'} position pointer position
*/
setPosition(position='left'){
// YOUR OWN CODE
}
Oh yeah, I'm using ES6.
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improve this answer...
What does “%.*s” mean in printf?
...
You can use an asterisk (*) to pass the width specifier/precision to printf(), rather than hard coding it into the format string, i.e.
void f(const char *str, int str_len)
{
printf("%.*s\n", str_len, str);
}
share
...
Compare two objects in Java with possible null values
...
This is what Java internal code uses (on other compare methods):
public static boolean compare(String str1, String str2) {
return (str1 == null ? str2 == null : str1.equals(str2));
}
...
Is there an easy way to create ordinals in C#?
...ly that hard to write a function to do it.
public static string AddOrdinal(int num)
{
if( num <= 0 ) return num.ToString();
switch(num % 100)
{
case 11:
case 12:
case 13:
return num + "th";
}
switch(num % 10)
{
case 1:
...
与复制构造函数相关的错误.例如:0x77D9FCAA (ntdll.dll) (prog31.exe 中)处...
...员，没有复制构造函数出错
struct Node
{
Node(char *n="",int a = 0)
{
name = strdup(n);
strcpy(name,n);
age = a ;
}
~Node()
{
delete[] name;
}
char *name;
int age;
};
int main()
{
Node node1("Roger",20),node2(node1);
//print Roger 20 ...
What does the thread_local mean in C++11?
...o data that is seemingly global or static storage duration (from the viewpoint of the functions using it) but in actual fact, there is one copy per thread.
It adds to the current automatic (exists during a block/function), static (exists for the program duration) and dynamic (exists on the heap bet...