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Overload constructor for Scala's Case Classes?
...f apply(bar: Int) = new Foo(bar)
}
Foo(1, 2)
Foo(1)
In Scala 2.8, named and default parameters can often be used instead of overloading.
case class Baz(bar: Int, baz: Int = 0)
new Baz(1)
Baz(1)
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Python: changing value in a tuple
...basically two ways of replacing a tuple's element at a given index. Either convert the tuple to a list, replace the element and convert back, or construct a new tuple by concatenation.
In [1]: def replace_at_index1(tup, ix, val):
...: lst = list(tup)
...: lst[ix] = val
...: ret...
What's the best way to do a backwards loop in C/C#/C++?
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That's too obscure and obfuscated. I'd never write something like this in production code...
– Mihai Todor
Jun 22 '12 at 13:04
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ViewPager and fragments — what's the right way to store fragment's state?
...y called when a fragment for that position does not exist. After rotating, Android will notice that it already created/saved a fragment for this particular position and so it simply tries to reconnect with it with FragmentManager.findFragmentByTag(), instead of creating a new one. All of this comes ...
Declaration/definition of variables locations in ObjectiveC?
Ever since starting to work on iOS apps and objective C I've been really puzzled by the different locations where one could be declaring and defining variables. On one hand we have the traditional C approach, on the other we have the new ObjectiveC directives that add OO on top of that. Could you fo...
What are the undocumented features and limitations of the Windows FINDSTR command?
..., 0x0B Vertical Tab, 0x0C Form Feed, 0x0D Carriage Return.
XP FINDSTR also converts a number of extended ASCII characters to dots as well. The extended ASCII characters that display as dots on XP are the same as those that are transformed when supplied on the command line. See the "Character limits ...
How do I stop Entity Framework from trying to save/insert child objects?
...tegrity problems. How do I force EF to only save the entity I want to save and therefore ignore all child objects?
11 Answe...
Proper way to initialize a C# dictionary with values?
...y();
}
}
Can you try to reproduce it in a simple Console application and go from there? It seems likely that you're targeting .NET 2.0 (which doesn't support it) or client profile framework, rather than a version of .NET that supports initialization syntax.
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Mapping two integers to one, in a unique and deterministic way
Imagine two positive integers A and B. I want to combine these two into a single integer C.
18 Answers
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How to use clock() in C++
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@Th.Thielemann both clock() and clock_t are from the C Standard Library's header of time.h, and therefore do not need the use of std namespace prefixes after the inclusion of their libraries. <ctime> wraps that value and function with the std name...