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Best way to build a Plugin system with Java
...implement some kind of sandboxing so that the plugin is restricted in what it can and can not do. I have created a small test application (and blogged about it) that consists of two plugins, one of which is denied access to local resources.
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What's the difference between lists and tuples?
...tructure, lists have order.
Using this distinction makes code more explicit and understandable.
One example would be pairs of page and line number to reference locations in a book, e.g.:
my_location = (42, 11) # page number, line number
You can then use this as a key in a dictionary to store ...
Using printf with a non-null terminated string
Suppose you have a string which is NOT null terminated and you know its exact size, so how can you print that string with printf in C? I recall such a method but I can not find out now...
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Use of Finalize/Dispose method in C#
...doesn't use unmanaged resources, you simply implement a Dispose method as with normal interface implementations:
public sealed class A : IDisposable
{
public void Dispose()
{
// get rid of managed resources, call Dispose on member variables...
}
}
When implementing an unsealed...
Throwing cats out of windows
Imagine you're in a tall building with a cat. The cat can survive a fall out of a low story window, but will die if thrown from a high floor. How can you figure out the longest drop that the cat can survive, using the least number of attempts?
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Can you split a stream into two streams?
...can't get two Streams out of one; this doesn't make sense -- how would you iterate over one without needing to generate the other at the same time? A stream can only be operated over once.
However, if you want to dump them into a list or something, you could do
stream.forEach((x) -> ((x == 0) ...
How to check that a string is a palindrome using regular expressions?
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The answer to this question is that "it is impossible". More specifically, the interviewer is wondering if you paid attention in your computational theory class.
In your computational theory class you learned about finite state machines. A finite state machine ...
How to cache data in a MVC application
...s();
Cache["names"] = names;
}
return names;
}
A bit simplified but I guess that would work. This is not MVC specific and I have always used this method for caching data.
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What are enums and why are they useful?
Today I was browsing through some questions on this site and I found a mention of an enum being used in singleton pattern about purported thread safety benefits to such solution.
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What is code coverage and how do YOU measure it?
What is code coverage and how do YOU measure it?
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