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Can an abstract class have a constructor?
...hardcodes the value 2. The concrete class TimesWhat has a constructor that allows the caller to specify the value.
Abstract constructors will frequently be used to enforce class constraints or invariants such as the minimum fields required to setup the class.
NOTE: As there is no default (or no...
Git alias with positional parameters
Basically I'm trying to alias:
7 Answers
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Trust Anchor not found for Android SSL Connection
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The solution of @Chrispix is dangerous! Trusting all certificates allows anybody to do a man in the middle attack! Just send ANY certificate to the client and it will accept it!
Add your certificate(s) to a custom trust manager like described in this post: Trusting all cer...
Using -performSelector: vs. just calling the method
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Basically performSelector allows you to dynamically determine which selector to call a selector on the given object. In other words the selector need not be determined before runtime.
Thus even though these are equivalent:
[a...
Volatile vs. Interlocked vs. lock
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Worst (won't actually work)
Change the access modifier of counter to public volatile
As other people have mentioned, this on its own isn't actually safe at all. The point of volatile is that multiple threads running on multiple CPUs can and...
Identifying the dependency relationship for python packages installed with pip
... freeze I see large number of Python packages that I didn't explicitly install, e.g.
8 Answers
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Add an already existing directory to a directory in Solution Explorer
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Click the 'Show all files' button at the top of the Solution Explorer and right click the folder desired and select 'include in project'.
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XDocument or XmlDocument
...ment = new XElement(ns + "elementName");
// etc
LINQ to XML also works really well with LINQ - its construction model allows you to build elements with sequences of sub-elements really easily:
// Customers is a List<Customer>
XElement customersElement = new XElement("customers",
custome...
Can I catch multiple Java exceptions in the same catch clause?
...tch (IOException | SQLException ex) {
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}
Remember, though, that if all the exceptions belong to the same class hierarchy, you can simply catch that base exception type.
Also note that you cannot catch both ExceptionA and ExceptionB in the same block if ExceptionB is inherited, either direct...
Intellij reformat on file save
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https://github.com/dubreuia/intellij-plugin-save-actions/issues/63
I actually tried to assign reformat to Ctrl+S and it worked fine - saving is done automatically now.
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