大约有 31,100 项符合查询结果（耗时：0.0412秒） [XML]
Get an object properties list in Objective-C
...
I just managed to get the answer myself. By using the Obj-C Runtime Library, I had access to the properties the way I wanted:
- (void)myMethod {
unsigned int outCount, i;
objc_property_t *properties = class_copyPropertyList([self class], &outCou...
Count(*) vs Count(1) - SQL Server
...do too.
SYS_GUID() in Oracle is quite computation intensive function.
In my test database, t_even is a table with 1,000,000 rows
This query:
SELECT COUNT(SYS_GUID())
FROM t_even
runs for 48 seconds, since the function needs to evaluate each SYS_GUID() returned to make sure it's not a NULL....
How do I vertically center text with CSS? [duplicate]
...
Only 3rd approach works well on my Firefox 22.0, however it does not work for all browsers. First 2 approaches stop working properly once I change height size for the div
– YMC
Jul 30 '13 at 22:28
...
When NOT to use yield (return) [duplicate]
... : Enumerable.Empty<UserRight>();
}
Update
Here's the results of my benchmark:
These results show how long it took (in milliseconds) to perform the operation 1,000,000 times. Smaller numbers are better.
In revisiting this, the performance difference isn't significant enough to worry ab...
What does placing a @ in front of a C# variable name do? [duplicate]
...
My guess is that the previous coder didn't know how they worked.
– Orion Adrian
Oct 31 '08 at 19:42
7
...
Include only certain file types when searching in Visual Studio
Often when I want to search through my code in Visual Studio, I know the thing I'm looking for is in some C# code. However, as I've used the same variable name in a JavaScript file, I have to wade through all those search results too. This gets even worse when the text I'm looking for is also used i...
Git error on git pull (unable to update local ref)
...
My team and I ran into this error, unable to update local ref, when doing a pull in SourceTree.
We used :
git gc --prune=now
This removes any duplicate reference objects which should fix the issue.
Here are a few links ...
Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
Let's say the bottleneck of my Java program really is some tight loops to compute a bunch of vector dot products. Yes I've profiled, yes it's the bottleneck, yes it's significant, yes that's just how the algorithm is, yes I've run Proguard to optimize the byte code, etc.
...
How to exclude this / current / dot folder from find “type d”
...es a variable for DRYness:
D="long_name"
find "$D" ! -path "$D" -type d
My decision tree between ! and -mindepth:
script? Use ! for portability.
interactive session on GNU?
exclude .? Throw a coin.
exclude long_name? Use -mindepth.
...
Returning a boolean from a Bash function
...ile has certain properties and returns true or false. Then I can use it in my scripts in the "if". But what should I return?
...