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What is the difference between Serializable and Externalizable in Java?
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To add to the other answers, by implementating java.io.Serializable, you get "automatic" serialization capability for objects of your class. No need to implement any other logic, it'll just work. The Java runtime will use reflection to figure out how to marshal ...
E731 do not assign a lambda expression, use a def
...warning whenever I use lambda expressions. Are lambda expressions not recommended? If not why?
4 Answers
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What is the difference between MVC and MVVM? [closed]
...rns crop up, in different ways, in both ASP.Net and Silverlight/WPF development.
For ASP.Net, MVVM is used to two-way bind data within views. This is usually a client-side implementation (e.g. using Knockout.js). MVC on the other hand is a way of separating concerns on the server-side.
For Silverlig...
C++11 rvalues and move semantics confusion (return statement)
...val_ref = return_vector();
In the second example you have created a run time error. rval_ref now holds a reference to the destructed tmp inside the function. With any luck, this code would immediately crash.
Third example
std::vector<int> return_vector(void)
{
std::vector<int> tmp...
What's the idiomatic syntax for prepending to a short python list?
...rt(0, x) form is the most common.
Whenever you see it though, it may be time to consider using a collections.deque instead of a list.
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Is JavaScript guaranteed to be single-threaded?
JavaScript is known to be single-threaded in all modern browser implementations, but is that specified in any standard or is it just by tradition? Is it totally safe to assume that JavaScript is always single-threaded?
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Invalidating JSON Web Tokens
...king about switching over from a cookie based session approach (by this, I mean, storing an id to a key-value store containing user sessions in a user's browser) to a token-based session approach (no key-value store) using JSON Web Tokens (jwt).
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Why does the JVM still not support tail-call optimization?
...vm-prevent-tail-call-optimizations , there seems to be a prototype implementation and MLVM has listed the feature as "proto 80%" for some time now.
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What's wrong with nullable columns in composite primary keys?
...s in any of the columns that comprise a primary key. It appears that the same is true of most other "enterprise-level" systems.
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In Functional Programming, what is a functor?
I've come across the term 'Functor' a few times while reading various articles on functional programming, but the authors typically assume the reader already understands the term. Looking around on the web has provided either excessively technical descriptions (see the Wikipedia article ) or incred...