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~ (index) r 寄存器，不指定index操作当前线程
注释：$$ xxx; 之间被注释
* xxx;xxx 分号后面被注释
取别名： as v version; v，用户别名
$u0 ~ $u9 固定别名，自动定义别名
al 查看所有别名
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Difference between HTTP redirect codes
The differences between the various HTTP 3XX redirect codes are not clear to me. Yes, I've read the spec, but there seems to be some discrepancy between the standard and actual practice here.
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How to set up Spark on Windows?
...%PATH%
cd /D %SPARK_HOME%
set SPARK_CP=%SPARK_HOME%\conf\;%SPARK_HOME%\lib\xxx.jar;...other jars...
set MAHOUT_CP=%MAHOUT_HOME%\lib\xxx.jar;...other jars...;%MAHOUT_HOME%\xxx.jar;...other jars...;%SPARK_CP%;%MAHOUT_HOME%\lib\spark\xxx.jar;%MAHOUT_HOME%\lib\hadoop\xxx.jar;%MAHOUT_HOME%\src\conf;%JAVA...
Recursive sub folder search and return files in a list python
...ython 3.4+
from pathlib import Path
result = list(Path(".").rglob("*.[tT][xX][tT]"))
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How to find all the subclasses of a class given its name?
...lt;class '__main__.Baz'>, <class '__main__.Bing'>]
# using eval('xxx') instead of vars()['xxx']
def func2():
print(all_subclasses(eval('Foo')))
func2() # Works
# -> [<class '__main__.Bar'>, <class '__main__.Baz'>, <class '__main__.Bing'>]
This could be improved...
What platforms have something other than 8-bit char?
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TI C62xx and C64xx DSPs also have 16-bit chars. (uint8_t isn't defined on that platform.)
– myron-semack
Jan 20 '10 at 2:35
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Check status of one port on remote host [closed]
...mmand line that can check the port status on a remote host. I tried ping xxx.xxx.xxx.xxx:161 but it doesn't recognize the "host". I thought it was a "good" answer until I did the same command against a host I know has that port open. This is for a batch file on Windows that will check the statu...
What is the actual use of Class.forName(“oracle.jdbc.driver.OracleDriver”) while connecting to a dat
....OracleDriver");
conn = DriverManager.getConnection("jdbc:oracle:thin:@XXX.XXX.XXX.XXX:XXXX:dbName", "user", "password");
Statement stmt = conn.createStatement();
out.println("Connection established!");
}
catch (Exception ex)
{
out.println("Exception: " + ex.getMessage() + "");
}
fi...
Where does Oracle SQL Developer store connections?
...wse (should open to your SQL Developer directory)
Drill down to "systemx.x.xx.xx" (replace x's with your previous version of SQL Developer)
Find and drill into a folder that has ".db.connection." in it (for me, it was in o.jdeveloper.db.connection.11.1.1.4.37.59.48)
select connections.xml and click ...
How to get only the last part of a path in Python?
...: This approach works in case you give it /folderA/folderB/folderC/folderD/xx.py. This gives xx.py as the basename. Which is not what you want I guess. So you could do this -
>>> import os
>>> path = "/folderA/folderB/folderC/folderD"
>>> if os.path.isdir(path):
...