大约有 42,000 项符合查询结果（耗时：0.0824秒） [XML]
Pass props to parent component in React.js
...at child prop!: if the child has a prop, then it is because its parent provided that prop to the child! Why do you want the child to pass back the prop to the parent, while the parent obviously already has that prop?
Better implementation
Child: it really does not have to be more complicated than ...
How do I use vimdiff to resolve a git merge conflict?
...
All four buffers provide a different view of the same file. The top left buffer (LOCAL) is how the file looked in your target branch (what you are merging into). The top right buffer (REMOTE) is how the file looked in your source branch (where yo...
How does having a dynamic variable affect performance?
...t represents the operation. So, for example, if you have:
class C
{
void M()
{
dynamic d1 = whatever;
dynamic d2 = d1.Foo();
then the compiler will generate code that is morally like this. (The actual code is quite a bit more complex; this is simplified for presentation pu...
How many GCC optimization levels are there?
...
To be pedantic, there are 8 different valid -O options you can give to gcc, though there are some that mean the same thing.
The original version of this answer stated there were 7 options. GCC has since added -Og to bring the total to 8
From the man page:
-O ...
Efficiency of purely functional programming
...programming purely functionally as opposed to imperatively (i.e. allowing side-effects)?
5 Answers
...
How to use glOrtho() in OpenGL?
...code every time the window is resized:
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0f, windowWidth, windowHeight, 0.0f, 0.0f, 1.0f);
This will remap the OpenGL coordinates into the equivalent pixel values (X going from 0 to windowWidth and Y going from 0 to windowHeight). Note that I...
How is set() implemented?
...king about the average case. In the worst case (when all hashed values collide) membership-checking is O(n). See the Python wiki on time complexity.
The Wikipedia article says the best case time complexity for a hash table that does not resize is O(1 + k/n). This result does not directly apply to P...
Debug vs Release in CMake
... creating a sub-directory! It is advised to create the build directory outside/above the source directory.
– Victor Lamoine
Feb 19 '17 at 10:50
...
Using Build Flavors - Structuring source folders and build.gradle correctly
...are never selected together, but main and flavor1 are.
If you want to provide a different version of an activity in different flavor do not put it in src/main/java.
Do note that if you had 3 flavors and only wanted a custom one for flavor1, while flavor2 and flavor3 shared the same activity you co...
What is the canonical way to check for errors using the CUDA runtime API?
...
#define gpuErrchk(ans) { gpuAssert((ans), __FILE__, __LINE__); }
inline void gpuAssert(cudaError_t code, const char *file, int line, bool abort=true)
{
if (code != cudaSuccess)
{
fprintf(stderr,"GPUassert: %s %s %d\n", cudaGetErrorString(code), file, line);
if (abort) exit(code);...