大约有 40,000 项符合查询结果（耗时：0.0308秒） [XML]
Listing all permutations of a string/integer
...(IEnumerable<T> list, int length)
{
if (length == 1) return list.Select(t => new T[] { t });
return GetPermutations(list, length - 1)
.SelectMany(t => list.Where(e => !t.Contains(e)),
(t1, t2) => t1.Concat(new T[] { t2 }));
}
Example:
IEnumerable<...
PDO get the last ID inserted
...nt to do it with SQL instead of the PDO API, you would do it like a normal select query:
$stmt = $db->query("SELECT LAST_INSERT_ID()");
$lastId = $stmt->fetchColumn();
share
|
improve this a...
Use tnsnames.ora in Oracle SQL Developer
...s shown in below image.
In the Preferences options expand Database --> select Advanced --> under "Tnsnames Directory" --> Browse the directory where tnsnames.ora present.
Then click on Ok,
as shown in below diagram.
tnsnames.ora available at Drive:\oracle\product\10x.x.x\client_x\NETWORK\A...
How can I get every nth item from a List?
...
}
and you write in a LINQish way
from var element in MyList.GetNth(10) select element;
2nd Edit:
To make it even more LINQish
from var i in Range(0, ((myList.Length-1)/n)+1) select list[n*i];
share
|
...
How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
...tep 1: Add VBA reference to "Microsoft VBScript Regular Expressions 5.5"
Select "Developer" tab (I don't have this tab what do I do?)
Select "Visual Basic" icon from 'Code' ribbon section
In "Microsoft Visual Basic for Applications" window select "Tools" from the top menu.
Select "References"
Chec...
delete word after or around cursor in VIM
... Probably worth mentioning that aw is one example of object selection. You can try object selections in visual mode to see what effect they have: vimdoc.sourceforge.net/htmldoc/motion.html#object-select
– crantok
Dec 29 '18 at 16:49
...
How to get a one-dimensional scalar array as a doctrine dql query result?
...as callback, instead of writing a closure.
$result = $em->createQuery("SELECT a.id FROM Auction a")->getScalarResult();
$ids = array_map('current', $result);
See Petr Sobotka's answer below for additional info regarding memory usage.
PHP >= 5.5
As jcbwlkr's answered below, the rec...
How to build an APK file in Eclipse?
...ned .apk from Eclipse, right-click the project in the Package Explorer and select Android Tools -> Export Unsigned Application Package. Then specify the file location for the unsigned .apk.
share
|
...
How to add a primary key to a MySQL table?
...le as it is written now, which can be a little confusing when doing simple SELECT * ...
– StefanK
Apr 12 '19 at 6:45
H...
What are the typical reasons Javascript developed on Firefox fails on IE? [closed]
...usepos = [evt.clientX+scrollpos[0], evt.clientY+scrollpos[1]];
};
};
Selections/ranges:
<textarea> and <input> selections: selectionStart and selectionEnd are not implemented in IE, and there's a proprietary "ranges" system in its place, see also Caret position in textarea, in ch...