大约有 47,000 项符合查询结果（耗时：0.0740秒） [XML]
Postgresql aggregate array
...
Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to repeat the columns on SELECT to G...
Set value of hidden input with jquery
...
130
You should use val instead of value.
<script type="text/javascript" language="javascript">...
How do I prevent angular-ui modal from closing?
...
10
Is there any way to set these dynamically -- say if the popup is in the middle of an operation that shouldn't be interrupted?
...
What is Vim recording and how can it be disabled?
...
1086
You start recording by q<letter>
and you can end it by typing q again.
Recording is a r...
Get list of passed arguments in Windows batch script (.bat)
...rs (excluding the script name itself). You might also find these useful:
%0 - the command used to call the batch file (could be foo, ..\foo, c:\bats\foo.bat, etc.)
%1 is the first command line parameter,
%2 is the second command line parameter,
and so on till %9 (and SHIFT can be used for those aft...
Java String split removed empty values
...
506
split(delimiter) by default removes trailing empty strings from result array. To turn this mech...
#define macro for debug printing in C?
... \
do { if (DEBUG) fprintf(stderr, fmt, __VA_ARGS__); } while (0)
It assumes you are using C99 (the variable argument list notation is not supported in earlier versions). The do { ... } while (0) idiom ensures that the code acts like a statement (function call). The unconditional use...
How do I force a UITextView to scroll to the top every time I change the text?
...|
edited Jul 17 '18 at 15:06
keeshux
47122 silver badges88 bronze badges
answered Apr 1 '10 at 3:02
...
What is a lambda expression in C++11?
... be writing a whole class just to do something trivial and one off.
In C++03 you might be tempted to write something like the following, to keep the functor local:
void func2(std::vector<int>& v) {
struct {
void operator()(int) {
// do something
}
} f;
std::for_each(...
Scala: Nil vs List()
... |
edited May 8 '13 at 20:49
answered May 12 '11 at 17:28
...