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set up device for development (???????????? no permissions)
...worked well but, as noted by @luciana in another answer, you might need to call sudo udevadm control --reload-rules to refresh udev rules if restarting the server isn't enough.
– serjlee
Nov 17 '14 at 14:54
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No @XmlRootElement generated by JAXB
...s certain information in order to marshal/unmarshal a given object, specifically the XML element name and namespace. You can't just pass any old object to the Marshaller. @XmlRootElement provides this information.
The annotation is just a convenience, however - JAXB does not require it. The alterna...
What is the lifetime of a static variable in a C++ function?
...s scope it is only initialized once and retains its value between function calls. What exactly is its lifetime? When do its constructor and destructor get called?
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Looking for a clear definition of what a “tokenizer”, “parser” and...
...ually by looking for whitespace (tabs, spaces, new lines).
A lexer is basically a tokenizer, but it usually attaches extra context to the tokens -- this token is a number, that token is a string literal, this other token is an equality operator.
A parser takes the stream of tokens from the lexer a...
Can you write virtual functions / methods in Java?
...in Java, dynamic method dispatch happens only for the object the method is called on - as explained here so the example explaining virtual functions for C++ here is not valid for java.
– Broccoli
Dec 7 '16 at 16:42
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Turning a Comma Separated string into individual rows
... I have to tell you that method is "lovingl" (feel the love?) called the "XML Splitter Method" and is almost as slow as either a While Loop or Recursive CTE. I strongly recommend that you avoid it at all times. Use DelimitedSplit8K instead. It blows the doors off of everything excep...
Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
...null
IL_0002: stloc.0 // s
IL_0003: ldloc.0 // s
IL_0004: callvirt System.String.get_Length
IL_0009: call System.Console.WriteLine
It is the callvirt opcode that throws the NullReferenceException and it does that when the first argument on the evaluation stack is a null...
SQLAlchemy default DateTime
...u can test it here: pastebin.com/VLyWktUn . datetime.datetime.utcnow seems called as callback.
– bux
Mar 4 '16 at 14:55
2
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Best way to iterate through a Perl array
...her. The sub still owns them, and will reuse them the next time the sub is called. Optimised for speed.
– ikegami
May 7 '12 at 20:26
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What does it mean: The serializable class does not declare a static final serialVersionUID field? [d
...lization runtime associates with each serializable class a version number, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization. If the recei...