大约有 13,913 项符合查询结果（耗时：0.0307秒） [XML]
What is path of JDK on Mac ? [duplicate]
...ided by Oracle). The best generic way to find this out is to run
/usr/libexec/java_home
This is the natively supported way to find out both the path to the default Java installation as well as all alternative ones present.
If you check out its help text (java_home -h), you'll see that you can u...
What is a deadlock?
When writing multi-threaded applications, one of the most common problems experienced are deadlocks.
17 Answers
...
GDB corrupted stack frame - How to debug?
...
Those bogus adresses (0x00000002 and the like) are actually PC values, not SP values. Now, when you get this kind of SEGV, with a bogus (very small) PC address, 99% of the time it's due to calling through a bogus function pointer. Note that virtu...
Why does an overridden function in the derived class hide other overloads of the base class?
...happens, people who respond either say that this called "name hiding" and explain how it works (which you probably already know), or explain how to override it (which you never asked about), but nobody seems to care to address the actual "why" question.
The decision, the rationale behind the name h...
How are software license keys generated?
...ally have no idea how license keys are generated. What is a good (secure) example of license key generation? What cryptographic primitive (if any) are they using? Is it a message digest? If so, what data would they be hashing? What methods do developers employ to make it difficult for crackers to bu...
Subscripts in plots in R
...
expression is your friend:
plot(1,1, main=expression('title'^2)) #superscript
plot(1,1, main=expression('title'[2])) #subscript
share
|
...
Understanding reference counting with Cocoa and Objective-C
... object when I'm done with it. If I don't, there will be a memory leak.
Example of object creation:
NSString* s = [[NSString alloc] init]; // Ref count is 1
[s retain]; // Ref count is 2 - silly
// to do this after init
[s rel...
Are lists thread-safe?
...y attempts to concurrently access, the lists's data is not protected. For example:
L[0] += 1
is not guaranteed to actually increase L[0] by one if another thread does the same thing, because += is not an atomic operation. (Very, very few operations in Python are actually atomic, because most of t...
Convert Enumeration to a Set/List
...
There is a simple example of convert enumeration to list. for this i used Collections.list(enum) method.
public class EnumerationToList {
public static void main(String[] args) {
Vector<String> vt = new Vector<String&g...
What's the best way to put a c-struct in an NSArray?
...bly lighter weight than NSData for simple data structures.
Simply use an expression like the following:
[NSValue valueWithBytes:&p objCType:@encode(Megapoint)];
And to get the value back out:
Megapoint p;
[value getValue:&p];
...