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How can I programmatically create a new cron job?
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if you use a package manager to package your software, you can simply lay down files in that directory and they are interpreted as if they were crontabs, but with an extra field for the username, e.g.:
Filename: /etc/cron.d/per_minute
Content:
* * * * * root /bin/sh /home/root/script.sh
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How do I select a random value from an enumeration?
...s every time instead of caching it in an array. This would slow their code down so I don't see what's your contribution here?
– Bojidar Stanchev
Oct 10 '19 at 10:56
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Visual Studio popup: “the operation could not be completed”
...ser" file didn't help like it did last time. I finally managed to track it down to an IIS Express issue. I removed the site from my applicationhost.config and let Visual Studio recreate it, this allowed the project to finally be loaded.
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Is there a way to provide named parameters in a function call in JavaScript?
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Noted. I will get down to putting this to use. Marking as answer! ...For now ;)
– Robin Maben
Aug 3 '12 at 15:43
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how to implement a long click listener on a listview
...ck = false;
}
if (event.getAction() == MotionEvent.ACTION_DOWN) {
isLongClick = false;
}
return super.onTouchEvent(event);
}
@Override
public boolean performLongClick() {
isLongClick = true;
return super.performLongClick();
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Error handling in C code
...g a non-throwing variant.
C++ exceptions are relatively expensive but this downside is mostly overblown for programs making sensible use of exceptions. A program simply shouldn't throw exceptions on a codepath where performance is a concern. It doesn't really matter how fast your program can report ...
How to join (merge) data frames (inner, outer, left, right)
... df2:
merge(df1,df2, all.y=TRUE)
you can flip 'em, slap 'em and rub 'em down to get the other two outer joins you asked about :)
Subscript Method
A left outer join with df1 on the left using a subscript method would be:
df1[,"State"]<-df2[df1[ ,"Product"], "State"]
The other combination o...
Switching to landscape mode in Android Emulator
...l+F5 Volume up (or + on numeric keyboard with Num Lock off) Ctrl+F6 Volume down (or + on numeric keyboard with Num Lock off) F7 Power Button Ctrl+F3 Camera Button
Ctrl+F11Switch layout orientation portrait/landscape backwards
Ctrl+F12 Switch layout orientation portrait/landscape forwards
F8 Toggl...
Struct like objects in Java
...nate in whole pixels any other way. Getters and setters will only slow you down.
On the other hand, with:
public class BankAccount{
public int balance;
}
You might want to change the way a balance is calculated at some point in the future. This should really use getters and setters.
It's al...
split string only on first instance - java
...first part would require yet another line of code...4 lines vs. 1 = thumbs down
– Clint Eastwood
Feb 25 '16 at 17:06
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