大约有 1,000 项符合查询结果（耗时：0.0140秒） [XML]
Equivalent of LIMIT and OFFSET for SQL Server?
...IELD}) as r_n_n
from {YOUR TABLES} where {OTHER OPTIONAL FILTERS}
) xx where r_n_n >={OFFSET HERE}
A note:
This solution will only work in SQL Server 2005 or above, since this was when ROW_NUMBER() was implemented.
...
sed: print only matching group
...up within a pattern, you can do it with a 2nd grep.
# To extract \1 from /xx([0-9]+)yy/
$ echo "aa678bb xx123yy xx4yy aa42 aa9bb" | grep -Eo 'xx[0-9]+yy' | grep -Eo '[0-9]+'
123
4
# To extract \1 from /a([0-9]+)b/
$ echo "aa678bb xx123yy xx4yy aa42 aa9bb" | grep -Eo 'a[0-9]+b' | grep -Eo '[0-9]+'
...
How to free memory in Java?
...is slightly too small, you're going to pay for it.) For example, in G1:
XX:G1NewSizePercent (defaults to 5; probably doesn't matter.)
XX:G1MaxNewSizePercent (defaults to 60; probably raise this.)
Consider telling the garbage collector you're not okay with a longer pause. This will cause more-fr...
Regular expression for a hexadecimal number?
...
How about the following?
0[xX][0-9a-fA-F]+
Matches expression starting with a 0, following by either a lower or uppercase x, followed by one or more characters in the ranges 0-9, or a-f, or A-F
...
How is the default max Java heap size determined?
...nd out the defaults on the system where your applications runs.
java -XX:+PrintFlagsFinal -version | findstr HeapSize
Look for the options MaxHeapSize (for -Xmx) and InitialHeapSize for -Xms.
On a Unix/Linux system, you can do
java -XX:+PrintFlagsFinal -version | grep HeapSize
I believ...
地图组件（高德地图） · App Inventor 2 中文网
... 根据描述生成特征 方法将其转换为组件。
坐标无效(消息)
当程序在处理地理数据时遇到无效点时，会触发 坐标无效 事件。
当点的经度或纬度超出可接受范围（分别为 [-90, 90] 和 [-180, 180]）时，该点被视为无效。
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Getting Http Status code number (200, 301, 404, etc.) from HttpWebRequest and HttpWebResponse
...
You have to be careful, server responses in the range of 4xx and 5xx throw a WebException. You need to catch it, and then get status code from a WebException object:
try
{
wResp = (HttpWebResponse)wReq.GetResponse();
wRespStatusCode = wResp.StatusCode;
}
catch (WebException...
How do I get an apk file from an Android device?
...b shell pm list packages -f -3
the output will be
package:/data/app/XX.XX.XX.apk=YY.YY.YY
now pull that package using below code:
adb pull /data/app/XX.XX.XX.apk
if you executed above cmd in C:>\ , then you will find that package there.
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How to convert Milliseconds to “X mins, x seconds” in Java?
... want to show them the time elapsed using a human readable format such as "XX hours, XX mins, XX seconds" or even "XX mins, XX seconds" because its not likely to take someone an hour.
...
Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
... small snippet of vectorizable math.
Run their benchmark flipping between -XX:-UseSuperWord and -XX:+UseSuperWord(default)
If no difference in performance is observed, your code probably didn't get vectorized
To make sure, run your benchmark such that it prints out the assembly. On linux you can enj...