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Which is preferred: Nullable.HasValue or Nullable != null?
...eal difference. Just do whichever is more readable/makes more sense to you and your colleagues.
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Generate random numbers uniformly over an entire range
I need to generate random numbers within a specified interval, [max;min].
17 Answers
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Non-static variable cannot be referenced from a static context
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You must understand the difference between a class and an instance of that class. If you see a car on the street, you know immediately that it's a car even if you can't see which model or type. This is because you compare what you see with t...
How do I represent a time only value in .NET?
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As others have said, you can use a DateTime and ignore the date, or use a TimeSpan. Personally I'm not keen on either of these solutions, as neither type really reflects the concept you're trying to represent - I regard the date/time types in .NET as somewhat on the sp...
Sort ArrayList of custom Objects by property
... (o1, o2) -> o1.getStartDate().compareTo(o2.getStartDate()));
And List has a sort(Comparator) method, so you can shorten this even further:
Database.arrayList.sort((o1, o2) -> o1.getStartDate().compareTo(o2.getStartDate()));
This is such a common idiom that there's a built-in method...
C++ Tuple vs Struct
Is there is any difference between using a std::tuple and a data-only struct ?
12 Answers
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How do I sort a list of dictionaries by a value of the dictionary?
..." % (elem['age'], elem['name']))
It is rather hackish, since it relies on converting the values into a single string representation for comparison, but it works as expected for numbers including negative ones (although you will need to format your string appropriately with zero paddings if you are ...
What tools are there for functional programming in C?
...ional programming in C ( not C++). Obviously, C is a procedural language and doesn't really support functional programming natively.
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C++ templates Turing-complete?
...n C++ is Turing-complete at compile time. This is mentioned in this post and also on wikipedia .
15 Answers
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How do you create nested dict in Python?
...after lookup with missing key. no exception raised:\n', nest)
# Instead, convert back to normal dict...
nest_d = nest.to_dict(nest)
try:
print('converted to normal dict. Trying to lookup Wrong_key2')
nest_d['outer1']['wrong_key2']
except KeyError as e:
print('exception missing key', e)...