大约有 46,000 项符合查询结果（耗时：0.0727秒） [XML]
Why must wait() always be in synchronized block
We all know that in order to invoke Object.wait() , this call must be placed in synchronized block, otherwise an IllegalMonitorStateException is thrown. But what's the reason for making this restriction? I know that wait() releases the monitor, but why do we need to explicitly acquire the mon...
Good geometry library in python? [closed]
...follow
|
edited Jul 27 '14 at 16:42
BoshWash
4,60244 gold badges2020 silver badges4343 bronze badges
...
Why is “final” not allowed in Java 8 interface methods?
...esign goal is interface evolution, not "turn interfaces into (mediocre) traits". While there's some overlap between the two, and we tried to be accommodating to the latter where it didn't get in the way of the former, these questions are best understood when viewed in this light. (Note too that cl...
Convert java.util.Date to java.time.LocalDate
...Instant().atZone(ZoneId.systemDefault()).toLocalDate();
Explanation
Despite its name, java.util.Date represents an instant on the time-line, not a "date". The actual data stored within the object is a long count of milliseconds since 1970-01-01T00:00Z (midnight at the start of 1970 GMT/UTC).
The...
Can't operator == be applied to generic types in C#?
...e compiler can't make that assumption.
However, this will compile because it is more explicit:
bool Compare<T>(T x, T y) where T : class
{
return x == y;
}
Follow up to additional question, "But, in case I'm using a reference type, would the the == operator use the pred...
What is the easiest way to make a C++ program crash?
I'm trying to make a Python program that interfaces with a different crashy process (that's out of my hands). Unfortunately the program I'm interfacing with doesn't even crash reliably! So I want to make a quick C++ program that crashes on purpose but I don't actually know the best and shortest way ...
If strings are immutable in .NET, then why does Substring take O(n) time?
...
UPDATE: I liked this question so much, I just blogged it. See Strings, immutability and persistence
The short answer is: O(n) is O(1) if n does not grow large. Most people extract tiny substrings from tiny strings, so how the complexity grows asymptotically is completely irr...
How do servlets work? Instantiation, sessions, shared variables and multithreading
...ServletContext
When the servlet container (like Apache Tomcat) starts up, it will deploy and load all its web applications. When a web application is loaded, the servlet container creates the ServletContext once and keeps it in the server's memory. The web app's web.xml and all of included web-frag...
What is the difference between memmove and memcpy?
...
With memcpy, the destination cannot overlap the source at all. With memmove it can. This means that memmove might be very slightly slower than memcpy, as it cannot make the same assumptions.
For example, memcpy might always c...
SOAP vs REST (differences)
...the first is a protocol (or at least tries to be) and the second is an architectural style. This is probably one of the sources of confusion around it, since people tend to call REST any HTTP API that isn't SOAP.
Pushing things a little and trying to establish a comparison, the main difference betw...