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What is “:-!!” in C code?
...ld.
The macro is somewhat misnamed; it should be something more like BUILD_BUG_OR_ZERO, rather than ...ON_ZERO. (There have been occasional discussions about whether this is a confusing name.)
You should read the expression like this:
sizeof(struct { int: -!!(e); }))
(e): Compute expression e....
Convert a CERT/PEM certificate to a PFX certificate
...
You need to rename .pem to .cer first in order for Windows to recognize the file as a certificate/private key file. Both file extensions may contain cert(s) and/or key(s) in either ASCII-armored plaintext or Base64/DER encoded binary format, but you can use cer fil...
XML attribute vs XML element
...ffline application that will then create a second XML file to pass back in order to update some of our data. During the process we have been discussing with the team of the other application about the structure of the XML file.
...
How do I know if a generator is empty from the start?
...quence in memory. So there's no backward traversal.
You could write a has_next function or maybe even slap it on to a generator as a method with a fancy decorator if you wanted to.
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Math.random() explanation
...both positive and negative, and minimum/maximum boundaries can come in any order.
int myRand(int i_from, int i_to) {
return (int)(Math.random() * (Math.abs(i_from - i_to) + 1)) + Math.min(i_from, i_to);
}
In general, it finds the absolute distance between the borders, gets relevant random value...
Big O, how do you calculate/approximate it?
... // 3
}
}
The first thing you needed to be asked is the order of execution of foo(). While the usual is to be O(1), you need to ask your professors about it. O(1) means (almost, mostly) constant C, independent of the size N.
The for statement on the sentence number one is tricky....
Positioning MKMapView to show multiple annotations at once
...(IBAction)zoomOut:(id)sender {
CLLocationCoordinate2D southWest = _newLocation.coordinate;
CLLocationCoordinate2D northEast = southWest;
southWest.latitude = MIN(southWest.latitude, _annotation.coordinate.latitude);
southWest.longitude = MIN(southWest.longitude, _an...
window.close and self.close do not close the window in Chrome
...ion" exploit. So code like this used to work in general:
open(location, '_self').close();
This is buggy behavior, IMO, and is now (as of roughly April 2015) mostly blocked. It will still work from injected code only if the tab is freshly opened and has no pages in the browsing history. So it'...
Error to install Nokogiri on OSX 10.9 Maverick?
...nswered Nov 6 '13 at 8:50
thomas_wittthomas_witt
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How do you make lettered lists using markdown?
Markdown allows ordered lists using numbers. How can I instead get an ordered list using letters ? i.e.
5 Answers
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