大约有 40,000 项符合查询结果（耗时：0.1021秒） [XML]
How do you test to see if a double is equal to NaN?
... the following code.
public class Not_a_Number {
public static void main(String[] args) {
// TODO Auto-generated method stub
String message = "0.0/0.0 is NaN.\nsimilarly Math.sqrt(-1) is NaN.";
String dottedLine = "------------------------------------------------";
D...
How can I read command line parameters from an R script?
...s[2] etc.
Then run
Rscript myscript.R arg1 arg2 arg3
If your args are strings with spaces in them, enclose within double quotes.
share
|
improve this answer
|
follow
...
Get current value of a setting in Vim
...
I believe listchars is an ordinary string, not a List, though I guess you could do something like split(&listchars, ',')
– cdyson37
Jul 15 '16 at 6:59
...
Calling virtual functions inside constructors
... System.out.println( "Derived: " + x );
}
public static void main( String args[] ) {
Derived d = new Derived( 5 );
}
}
// outputs: Derived 0
// Derived 5
// ... so much for final attributes never changing :P
As you see, calling a polymorphic (virtual in C++ terminology) m...
Run php script as daemon process
... Run the script!
# Note, in this example, if your PHP script returns
# the string "ERROR", the daemon will stop itself.
script
[ $(exec /usr/bin/php -f /path/to/your/script.php) = 'ERROR' ] && ( stop; exit 1; )
end script
Starting & stopping your daemon:
sudo service myphpworker s...
Change project name on Android Studio
...
don't forget to change app_name in strings.xml, otherwise it will build the apk with the old name
– shabby
Mar 5 '19 at 10:16
...
How to set environment variables from within package.json
...
I too had the space issue. When logging string length I could tell the space is added. I tried escaped quotes - and they were actually stored in the envar. I tried other delimiters to no avail. Removing the space or trimming the value, which feels wrong to me, were...
Why do I get “'property cannot be assigned” when sending an SMTP email?
...r from email address is from gmail.
static void SendEmail()
{
string mailBodyhtml =
"<p>some text here</p>";
var msg = new MailMessage("from@gmail.com", "to1@gmail.com", "Hello", mailBodyhtml);
msg.To.Add("to2@gmail.com");
msg.IsBodyHtml =...
How can I connect to MySQL in Python 3 on Windows?
...or
Almost completely compatible with MySQLdb, after calling pymysql.install_as_MySQLdb()
https://pypi.python.org/pypi/cymysql
fork of pymysql with optional C speedups
https://pypi.python.org/pypi/mysqlclient
Django's recommended library.
Friendly fork of the original MySQLdb, hopes to merge ...
How to use 'cp' command to exclude a specific directory?
...ge.
fishnew!
The fish shell has a much prettier answer to this:
???? cp (string match -v '*.excluded.names' -- srcdir/*) destdir
Bonus pro-tip
Type cp *, hit CtrlX* and just see what happens. it's not harmful I promise
s...