大约有 16,000 项符合查询结果（耗时：0.0242秒） [XML]
Why does struct alignment depend on whether a field type is primitive or user-defined?
...moving to nanosecond resolution. That means we can no longer use an 8-byte integer to represent the whole range of time we're interested in. That has prompted me to investigate the memory usage of the (many) structs of Noda Time, which has in turn led me to uncover a slight oddity in the CLR's align...
What is your favorite C programming trick? [closed]
...
C99 offers some really cool stuff using anonymous arrays:
Removing pointless variables
{
int yes=1;
setsockopt(yourSocket, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
}
becomes
setsockopt(yourSocket, SOL_SOCKET, SO_REUSEADDR, (int[]){1}, sizeof(int));
Passing a Variable Amo...
Is a LINQ statement faster than a 'foreach' loop?
...
Why should LINQ be faster? It also uses loops internally.
Most of the times, LINQ will be a bit slower because it introduces overhead. Do not use LINQ if you care much about performance. Use LINQ because you want shorter better readable and maintainable code.
...
What does “Memory allocated at compile time” really mean?
...ed inside the process memory map.
For example, consider a global array:
int array[100];
The compiler knows at compile-time the size of the array and the size of an int, so it knows the entire size of the array at compile-time. Also a global variable has static storage duration by default: it is...
Thread pooling in C++11
... can help:
1) Start with maximum number of threads a system can support:
int Num_Threads = thread::hardware_concurrency();
2) For an efficient threadpool implementation, once threads are created according to Num_Threads, it's better not to create new ones, or destroy old ones (by joining). Ther...
Case insensitive comparison of strings in shell script
...{var1,,}" = "${var2,,}" ]; then
echo ":)"
fi
All you're doing there is converting both strings to lowercase and comparing the results.
share
|
improve this answer
|
follo...
Multiple cases in switch statement
...red Aug 1 '10 at 13:29
Carlos QuintanillaCarlos Quintanilla
11.1k33 gold badges1919 silver badges2424 bronze badges
...
How to specify jackson to only use fields - preferably globally
...ust what I needed! This configuration allowed me to use a Mixin to easily convert Hibernate entities to DTOs. By default the ObjectMapper serializes everything and a Mixin would have to specify which properties to ignore (i.e. a subtraction instead of an intersection).
– Tast...
How does virtual inheritance solve the “diamond” (multiple inheritance) ambiguity?
... 1 instance of the base A class not 2.
Your type D would have 2 vtable pointers (you can see them in the first diagram), one for B and one for C who virtually inherit A. D's object size is increased because it stores 2 pointers now; however there is only one A now.
So B::A and C::A are the sam...
How to detect shake event with android?
...
From the code point of view, you need to implement the SensorListener:
public class ShakeActivity extends Activity implements SensorListener
You will need to acquire a SensorManager:
sensorMgr = (SensorManager) getSystemService(SENSOR_SE...