大约有 40,000 项符合查询结果（耗时：0.0613秒） [XML]
Fastest way to get the first object from a queryset in django?
...eturn None if there aren't any. There are lots of ways to do this which all work. But I'm wondering which is the most performant.
...
vc/mfc *通配符 批量删除文件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...indNextFile，支持 * 通配符查找文件，核心代码如下：
WIN32_FIND_DATA FindFileData;
char szCurPath[MAX_PATH + 1] = { 0 };
GetCurrentDirectory(MAX_PATH, szCurPath);
CString findFileName;
findFileName.Format("%stest*.txt", szCurPath);
HANDLE hFind = ::FindFirstFile(findFileNam...
.htm vs .html ? Which file extension naming is more correct? [closed]
...ays use the shorter .htm for our file names since file extensions are typically 3 characters long.
AND MORE ON: http://www.sightspecific.com/~mosh/WWW_FAQ/ext.html or http://www.sightspecific.com/~mosh/WWW_FAQ/ext.htm
I think I should add this part here:
There is one single slight difference betw...
Counting null and non-null values in a single query
...
If I understood correctly you want to count all NULL and all NOT NULL in a column...
If that is correct:
SELECT count(*) FROM us WHERE a IS NULL
UNION ALL
SELECT count(*) FROM us WHERE a IS NOT NULL
Edited to have the full query, after reading the comments :]
S...
Complete Working Sample of the Gmail Three-Fragment Animation Scenario?
...at I'll refer to as "the Gmail three-fragment animation" scenario. Specifically, we want to start with two fragments, like this:
...
How do I get the entity that represents the current user in Symfony2?
... you using ?
– Jeet
Jan 20 '15 at 7:32
add a comment
|
...
How to set specific java version to Maven
On my machine I have two java versions installed: (1.6 and 1.7 installed manually by me). I need both of them for different projects. But for Maven I need 1.7, now my Maven uses 1,6 java version, how can I set Maven to use 1.7?
...
Declaring and initializing variables within Java switches
...
Switch statements are odd in terms of scoping, basically. From section 6.3 of the JLS:
The scope of a local variable declaration in a block (§14.4) is the rest of the block in which the declaration appears, starting with its own initializer and including any further decla...
Bash if statement with multiple conditions throws an error
...ions.
tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html
Update
Actually you could still use && and || with the -eq operation. So your script would be like this:
my_error_flag=1
my_error_flag_o=1
if [ $my_error_flag -eq 1 ] || [ $my_error_flag_o -eq 2 ] || ([ $my_error_flag -eq 1 ] ...
Get bitcoin historical data [closed]
...
Maxim Mikhaylov
56377 silver badges2323 bronze badges
answered Jul 5 '13 at 15:22
SeanSean
41155 silver badges44 b...