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Python's “in” set operator
I'm a little confused about the python in operator for sets.
5 Answers
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Moment JS - check if a date is today or in the future
I am trying to use momentjs to check if a given date is today or in the future.
17 Answers
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Test whether a glob has any matches in bash
If I want to check for the existence of a single file, I can test for it using test -e filename or [ -e filename ] .
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Why is XOR the default way to combine hashes?
...t to combine them. I've read that a good way to combine two hashes is to XOR them, e.g. XOR( H(A), H(B) ) .
9 Answers
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javax.faces.application.ViewExpiredException: View could not be restored
...which I logout, then I come back to first page and I click on any link etc or refresh page I get this exception. I guess it's normal (or maybe not:)) because I logged out and session is destroyed. What should I do to redirect user to for example index.xhtml or login.xhtml and save him from seeing th...
What is the meaning of prepended double colon “::”?
...obal namespace, instead of starting at the namespace you're currently in. For instance, if you had two different classes called Configuration as such:
class Configuration; // class 1, in global namespace
namespace MyApp
{
class Configuration; // class 2, different from class 1
function blah...
Where should @Service annotation be kept? Interface or Implementation?
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I never put @Component (or @Service, ...) at an interface, because this make the interface useless. Let me explain why.
claim 1: If you have an interface then you want to use that interface for the injection point type.
claim 2: The purpose of an ...
Reduce, fold or scan (Left/Right)?
...uld I use reduceLeft , reduceRight , foldLeft , foldRight , scanLeft or scanRight ?
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How do I do an OR filter in a Django query?
...o list the items that either a user has added (they are listed as the creator) or the item has been approved.
6 Answers
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Is short-circuiting logical operators mandated? And evaluation order?
Does the ANSI standard mandate the logical operators to be short-circuited, in either C or C++?
7 Answers
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