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Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
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@cjordan1: I don't get what you're saying. The high level numpy constructs are extremely expressive (np.sum(M[1:2*n**2:2, :2*n**2] * M[:2*n**2:2, :2*n**2].conjugate(), axis=1)?) in Python and that makes Python very suitable for the scientific commu...
Using relative URL in CSS file, what location is it relative to?
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What difference does the extra "/" at the front make?
– Casebash
May 12 '11 at 6:36
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What is the difference between the Facade and Adapter Pattern?
...ding both definitions and they seem quite the same. Could anyone point out what are their differences?
16 Answers
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Why no ICloneable?
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@AndreyShchekin: What's unclear about deep vs shallow cloning? If List<T> had a clone method, I would expect it to yield a List<T> whose items have the same identities as those in the original list, but I would expect that any in...
Is there a performance impact when calling ToList()?
...i++ has a performance impact, it slows the program for maybe a few ticks.
What does .ToList do?
When you invoke .ToList, the code calls Enumerable.ToList() which is an extension method that return new List<TSource>(source). In the corresponding constructor, under the worst circumstance, it g...
Why are you not able to declare a class as static in Java?
...you're thinking about usually solves itself when you start to ask yourself what a "static class" would be. In java, a static element means that you can access/invoke it without an instance of the enclosing class; what that could possibly mean if you apply the keyword to the class itself? What are yo...
Best way to store password in database [closed]
...t is that if a trespasser gets a hold of your database, they can still use what are known as rainbow tables to be able to "decrypt" the password (at least those that show up in the rainbow table). To get around this, developers add a salt to passwords which, when properly done, makes rainbow attacks...
How to make a Java class that implements one interface with two generic types?
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But TwoTypesConsumer fulfills no contracts, so what's the point? It can't be passed to a method that wants either type of Consumer. The whole idea of a two-type consumer would be that you can give it to a method that wants a tomato consumer as well as a method that wants...
vector::at vs. vector::operator[]
...urprising results!! 5 to 10 times slower/faster! . I just don't understand what the at() method is good for.
8 Answers
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CSS Cell Margin
...sual) problem, it is not the right way to add spacing between table cells. What padding-right does for a cell is similar to what it does for most other elements: it adds space within the cell. If the cells do not have a border or background colour or something else that gives the game away, this can...