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What is the difference between 'E', 'T', and '?' for Java generics?
I come across Java code like this:
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FirstOrDefault: Default value other than null
As I understand it, in Linq the method FirstOrDefault() can return a Default value of something other than null. What I haven't worked out is what kind of things other than null can be returned by this (and similar) method when there are no items in the query result. Is there any particular wa...
Deep cloning objects
I want to do something like:
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Why should I care that Java doesn't have reified generics?
This came up as a question I asked in an interview recently as something the candidate wished to see added to the Java language. It's commonly-identified as a pain that Java doesn't have reified generics but, when pushed, the candidate couldn't actually tell me the sort of things that he could hav...
C++11 emplace_back on vector?
Consider the following program:
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How to implement a rule engine?
I have a db table that stores the following:
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Difference between `const shared_ptr` and `shared_ptr`?
I'm writing an accessor method for a shared pointer in C++ that goes something like this:
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How to do Base64 encoding in node.js?
Does node.js have built-in base64 encoding yet?
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What really is a deque in STL?
I was looking at STL containers and trying to figure what they really are (i.e. the data structure used), and the deque stopped me: I thought at first that it was a double linked list, which would allow insertion and deletion from both ends in constant time, but I am troubled by the promise made ...
How to pass anonymous types as parameters?
How can I pass anonymous types as parameters to other functions? Consider this example:
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