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RESTful Authentication via Spring
...As you can see, we've created a custom AuthenticationEntryPoint, which basically just returns a 401 Unauthorized if the request wasn't authenticated in the filter chain by our AuthenticationTokenProcessingFilter.
CustomAuthenticationEntryPoint:
public class CustomAuthenticationEntryPoint implement...
How to initialize a dict with keys from a list and empty value in Python?
... Be careful with initializing to something mutable: If you call, e.g., dict.fromkeys([1, 2, 3], []), all of the keys are mapped to the same list, and modifying one will modify them all.
– charleslparker
Jun 26 '13 at 16:47
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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...
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...
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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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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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...
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...
Revert to a commit by a SHA hash in Git? [duplicate]
...t reset --soft HEAD@{1} simply moves the pointer back to the HEAD prior to calling git reset 56e05fced. Using a higher number (e.g. git reset --soft HEAD@{2}) would append the new commit on a previous commit. That is, increasing the number would essentially throw away N-1 commits where N is the numb...