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The role of #ifdef and #ifndef
...d" while ifndef means "if the following is not defined".
So:
#define one 0
#ifdef one
printf("one is defined ");
#endif
#ifndef one
printf("one is not defined ");
#endif
is equivalent to:
printf("one is defined ");
since one is defined so the ifdef is true and the ifndef is false. It ...
How to pass an ArrayList to a varargs method parameter?
...toArray(new WorldLocation[locations.size()]))
(toArray(new WorldLocation[0]) also works, but you would allocate a zero length array for no reason.)
Here's a complete example:
public static void method(String... strs) {
for (String s : strs)
System.out.println(s);
}
...
List<...
What does SQL clause “GROUP BY 1” mean?
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edited Aug 20 '18 at 12:03
answered Sep 12 '11 at 19:12
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Command-line Tool to find Java Heap Size and Memory Used (Linux)?
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edited Feb 1 '17 at 20:03
cybersoft
1,2631111 silver badges2525 bronze badges
answered Oct 9 '12 at...
javascript remove “disabled” attribute from html input
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201
Set the element's disabled property to false:
document.getElementById('my-input-id').disabled ...
Get __name__ of calling function's module in Python
...ef info(msg):
frm = inspect.stack()[1]
mod = inspect.getmodule(frm[0])
print '[%s] %s' % (mod.__name__, msg)
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What does [:] mean?
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110
It is an example of slice notation, and what it does depends on the type of population. If popu...
Labels for radio buttons in rails form
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answered Apr 14 '09 at 5:13
Matt HaleyMatt Haley
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How do I close an open port from the terminal on the Mac?
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408
Find out the process ID (PID) which is occupying the port number (e.g., 5955) you would like t...
Heroku + node.js error (Web process failed to bind to $PORT within 60 seconds of launch)
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1043
Heroku dynamically assigns your app a port, so you can't set the port to a fixed number. Herok...