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Makefile variable as prerequisite
...-hostname: guard-HOSTNAME
./changeHostname.sh ${HOSTNAME}
If you call make change-hostname, without adding HOSTNAME=somehostname in the call, then you'll get an error, and the build will fail.
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How to check if NSString begins with a certain character
... in an NSArray? For example: NSArray *words = [NSArray arrayWithObjects:@"foo",@"bar",@"baz",nil]; ?
– adamdehaven
Aug 2 '13 at 14:27
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Preferred way to create a Scala list
...do so with a tail-recursive function, foldLeft, or something else is not really relevant.
If you get the elements in the same order you use them, then a ListBuffer is most likely a preferable choice, if performance is critical.
But, if you are not on a critical path and the input is low enough, yo...
How do I determine scrollHeight?
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What about browser support? All major versions of browsers support it? IE8+?
– SexyBeast
Jan 21 '14 at 15:39
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Best way to check if a URL is valid
...mal text. The function or solution, that I'm looking for, should recognize all links formats including the ones with GET parameters.
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HTML5 Email Validation
...e="Submit">
</form>
And when the user press submit, it automatically shows an error message like:
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What is the use of join() in Python threading?
...t clumsy ascii-art to demonstrate the mechanism:
The join() is presumably called by the main-thread. It could also be called by another thread, but would needlessly complicate the diagram.
join-calling should be placed in the track of the main-thread, but to express thread-relation and keep it as s...
Make a borderless form movable?
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This article on CodeProject details a technique. Is basically boils down to:
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
[System.Runtime.InteropServices.DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam...
Test if lists share any items in python
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Short answer: use not set(a).isdisjoint(b), it's generally the fastest.
There are four common ways to test if two lists a and b share any items. The first option is to convert both to sets and check their intersection, as such:
bool(set(a) & set(b))
Because sets are stor...
Why does SSL handshake give 'Could not generate DH keypair' exception?
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This works for me too, but I have added a provider dynamically. Reffer my answer here for details.
– v.ladynev
Nov 22 '15 at 9:19
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