大约有 35,424 项符合查询结果（耗时：0.0670秒） [XML]
MySQL: Set user variable from result of query
...-+
| 123456 | 5 |
| 111111 | 5 |
+--------+-------+
2 rows in set (0.00 sec)
Note that for SET, either = or := can be used as the assignment operator. However inside other statements, the assignment operator must be := and not = because = is treated as a comparison operator in non-SET stat...
Setting a timeout for socket operations
...et = new Socket();
socket.connect(new InetSocketAddress(ipAddress, port), 1000);
Quoting from the documentation
connect
public void connect(SocketAddress endpoint, int timeout) throws IOException
Connects this socket to the server with a specified timeout value. A timeout of zero is i...
Django queries - id vs pk
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answered Jan 29 '10 at 23:14
Felix KlingFelix Kling
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Switch to another Git tag
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answered Dec 2 '10 at 0:40
Fake Code Monkey RashidFake Code Monkey Rashid
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Purging file from Git repo failed, unable to create new backup
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edited Apr 4 '14 at 0:53
user456814
answered Jun 19 '11 at 18:37
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argparse store false if unspecified
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edited Nov 20 '11 at 19:11
answered Nov 20 '11 at 18:31
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Is XML case-sensitive?
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answered Sep 14 '11 at 10:27
Jon EgertonJon Egerton
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How do I test if a variable is a number in Bash?
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One approach is to use a regular expression, like so:
re='^[0-9]+$'
if ! [[ $yournumber =~ $re ]] ; then
echo "error: Not a number" >&2; exit 1
fi
If the value is not necessarily an integer, consider amending the regex appropriately; for instance:
^[0-9]+([.][0-9]+)?$
....
Java 8 stream reverse order
...ect[] temp = input.toArray();
return (Stream<T>) IntStream.range(0, temp.length)
.mapToObj(i -> temp[temp.length - i - 1]);
}
Another technique uses collectors to accumulate the items into a reversed list. This does lots of insertions at the front of Ar...
What is the HTML tag “div” short for?
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answered Aug 29 '09 at 1:26
RushyoRushyo
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