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Why do we check up to the square root of a prime number to determine if it is prime?
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How does sqrt(n) have to be precise enough for this property to hold given that we are using floating points.
– Benoît
May 26 at 19:16
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CSS hide scroll bar if not needed
...which posts will be displayed and I want to hide the scroll bar if content does not exceed the current width.
5 Answers
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Can I use git diff on untracked files?
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Does that work if you've got more than one untracked file that you've created since the last commit?
– Andrew Grimm
May 13 '09 at 7:46
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How can I add an empty directory to a Git repository?
...ade's comment persistent:
I think it's worth noting that this solution does precisely what the question asked for, but is not perhaps what many people looking at this question will have been looking for. This solution guarantees that the directory remains empty. It says "I truly never want files...
Collections.emptyList() returns a List?
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The second snippet does show type inference nicely but won't compile, of course. The call to this must be first statement in the constructor.
– Arjan
Jul 10 '16 at 2:30
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What is the difference between POST and GET? [duplicate]
...esting. Thanks for explaining the caching behind this. Two questions... 1. Doesn't this mean there are security issues with using GET 2. Does this mean I could use POST to do the same thing as GET?
– Hristo
Aug 13 '10 at 13:50
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How to sort an array of objects by multiple fields?
... method, based on this answer:
Update: Here is an "optimized" version. It does a lot more preprocessing and creates a comparison function for each sorting option beforehand. It might need more more memory (as it stores a function for each sorting option, but it should preform a bit better as it doe...
unable to copy/paste in mingw shell
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Weird, my MinGW git bash terminal does not have a Properties item. It does however have these two options: 1) Press the insert key on your keyboard to paste and 2) Right-click the terminal->Options->Mouse->"Right click action" RadioButton:Paste to rc...
Coding Practices which enable the compiler/optimizer to make a faster program
...o, i++)
{
barOut.munge(foo1, foo2[i]);
}
}
the compiler doesn't know that foo1 != barOut, and thus has to reload foo1 each time through the loop. It also can't read foo2[i] until the write to barOut is finished. You could start messing around with restricted pointers, but it's jus...
Loading/Downloading image from URL on Swift
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let data = try? Data(contentsOf: url!) //make sure your image in this url does exist, otherwise unwrap in a if let check / try-catch
imageView.image = UIImage(data: data!)
DISCLAIMER:
It's important to note that the Data(contentsOf:) method will download the contents of the url synchronously i...