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How do I check if a given string is a legal/valid file name under Windows?
... Windows. I've tried to use regular expression like [a-zA-Z0-9_]+ but it doesn't include many national-specific characters from various languages (e.g. umlauts and so on). What is the best way to do such a check?
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How to check if a variable is set in Bash?
...this syntax & usage guarantees this will only expand to something that does not require quotes (since it either expands to x (which contains no word breaks so it needs no quotes), or to nothing (which results in [ -z ], which conveniently evaluates to the same value (true) that [ -z "" ] does a...
How to initialize HashSet values by construction?
...et<>(Arrays.asList(SET_VALUES));
Slightly less ugly and efficiency does not matter for the static initialization.
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Get the key corresponding to the minimum value within a dictionary
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How does this work? What kind of min function is that, I thought min() only took either individual values or lists as arguments. How does it loop over all the entries in the dictionary?
– azureai
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Can I combine :nth-child() or :nth-of-type() with an arbitrary selector?
Is there a way to select every nth child that matches (or does not match) an arbitrary selector ? For example, I want to select every odd table row, but within a subset of the rows:
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Why doesn't Ruby support i++ or i-- (increment/decrement operators)?
... manage to make "auto(in|de)crement" working so
|could somebody help here? Does this contain some errors or is the idea
|wrong?
(1) ++ and -- are NOT reserved operator in Ruby.
(2) C's increment/decrement operators are in fact hidden assignment.
They affect variables, not objects. You c...
What do the terms “CPU bound” and “I/O bound” mean?
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How does this tie into understanding HTTP communication on a mobile device? I've seen CPU usage spike from using java.nio operations.
– IgorGanapolsky
Jun 28 '18 at 19:49
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Implements vs extends: When to use? What's the difference?
...uld be an abstract class (not EXACTLY the same but pretty much).
Also java doesn't support multiple inheritance for classes. This is solved by using multiple interfaces.
public interface ExampleInterface {
public void doAction();
public String doThis(int number);
}
public class sub imple...
What is a good Hash Function?
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What does YMMV stand for?
– cobarzan
Aug 24 '15 at 0:41
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Enum String Name from Value
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Does this use reflection or does the compiler create a helper dictionary for use behind the scenes?
– palswim
Mar 11 '19 at 19:48
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