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What does %>% mean in R [duplicate]
...sult as nesting. For example in the chain below, iris is passed to head(), then the result of that is passed to summary().
iris %>% head() %>% summary()
Thus iris %>% head() %>% summary() is equivalent to summary(head(iris)). Some people prefer chaining to nesting because the function...
Telnet is not recognized as internal or external command [closed]
...ave to go to Control Panel>Programs>Turn Windows features on or off. Then, check "Telnet Client" and save the changes. You might have to wait about a few minutes before the change could take effect.
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Updates were rejected because the tip of your current branch is behind hint: its remote counterpart.
...etails.... so when i ran git branch --set-upstream-to=origin/master master then git pull --rebase worked perfectlly... stupid read me file caused me all that
– Hussein Nasser
Jan 12 '18 at 20:30
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Deleting all rows from Cassandra cql table [duplicate]
...ght be your only option. The safer path would probably be to TRUNCATE and then run a nodetool clearsnapshot afterward.
– Aaron
Feb 26 at 13:47
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AfxGetApp->GetMainWnd() 与 AfxGetMainWnd() - C/C++ - 清泛网 - 专注C/C++及内核技术
...ad = pState->m_pCurrentWinThread;
// if no CWinThread for the module, then use the global app
if (pThread == NULL)
pThread = AfxGetApp();
return pThread;
}
可以看出当取得的线程句柄为空时,则返回主线程句柄，所以在主线程里调用AfxGetMainWnd()是...
MFC Telnet Application（mfc telnet 端口，代码实现、不调用telnet.exe） ...
...s, end the last string you typed with an ENTER, and press ESC to send it), then press the ESC key to send the data you typed in. Wait for the response from the server.
This one provides an example output of a whois query on port 43:
In case of getting disconnected, press CTRL+R to redial conne...
MongoDB.Driver.MongoConnectionException: Unable to connect to the prim...
...02 (member)
I have initReplset and add localhost:10002 to the replset,
Then I create a new connection.When I try to connect,the exception happened.
If slaveOk of this connection setting is true.
Stack:
MongoDB.Driver.MongoConnectionException: Unable to connect to any slaveOk
member of th...
Linux日志切分工具：Logrotate - 更多技术 - 清泛网 - 专注C/C++及内核技术
.../sbin/logrotate /etc/logrotate.conf
EXITVALUE=$?
if [ $EXITVALUE != 0 ]; then
/usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]"
fi
exit 0
实际运行时，Logrotate会调用配置文件「/etc/logrotate.conf」：
# see "man logrotate" for details
# rotate log f...
svn强制设定commit时写一定长度的日志 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...t "$TXN" "$REPOS" | grep "[a-zA-Z0-9]" | wc -c`
if [ "$LOGMSG" -lt 10 ];
then
echo -e "/nEmpty log message not allowed. Commit aborted!" 1>&2
exit 1
fi
总结：两种方法都可以，推荐用第二种方法，这才能起到强制的作用。第一种办法谁都可以改，强制不了...
虚拟机安装CentOS出错：EDD:Error 8000 reading sector 2106934 - 更多技术...
...nguage k
2.select location k
3.configure keyboard k
4.network config k
then it gets stuck on a purple screen with nothing in it and a white/black bottom that it lets me type in but nothing else happens.
http://ubuntuforums.org/showthread.php?t=2154690虚拟机 CentOS 出错