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Why does isNaN(“ ”) (string with spaces) equal false?
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@Kooilnc not to take away even slightly from the wackiness of javascript, but these NaNs are just obeying the IEEE 754 floating point standard. You can read ALL about it as usual on the big W: en.wikipedia.org/wiki/NaN
– Spike0xff
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What is a “surrogate pair” in Java?
...ode units are used. Since 16 bits can only contain the range of characters from 0x0 to 0xFFFF, some additional complexity is used to store values above this range (0x10000 to 0x10FFFF). This is done using pairs of code units known as surrogates.
The surrogate code units are in two ranges known as "...
Multiple variables in a 'with' statement?
... docs at docs.python.org/library/contextlib.html#contextlib.nested differs from the standard nested with blocks. The managers are created in order before entering the with blocks: m1, m2, m3 = A(), B(), C() If B() or C() fails with exception, then your only hope of properly finalizing A() is the g...
How to create a custom string representation for a class object?
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Ignacio Vazquez-Abrams' approved answer is quite right. It is, however, from the Python 2 generation. An update for the now-current Python 3 would be:
class MC(type):
def __repr__(self):
return 'Wahaha!'
class C(object, metaclass=MC):
pass
print(C)
If you want code that runs acr...
Why are arrays covariant but generics are invariant?
From Effective Java by Joshua Bloch,
9 Answers
9
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How to extract one column of a csv file
...ds up... if you want to use csvtool with standard input (example csv comes from another command) it's something like this cat input.csv | csvtool formath '%(2)\n' - Note I know cat here is useless but sub it for any command that would normally export a csv.
– General Redneck
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How to rethrow InnerException without losing stack trace in C#?
...d due to the await C# language feature, which unwraps the inner exceptions from AggregateException instances in order to make the asynchronous language features more like the synchronous language features.
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What does “#define _GNU_SOURCE” imply?
...nux extension functions
access to traditional functions which were omitted from the POSIX standard (often for good reason, such as being replaced with better alternatives, or being tied to particular legacy implementations)
access to low-level functions that cannot be portable, but that you sometime...
Is there common street addresses database design for all addresses of the world? [closed]
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It is possible to represent addresses from lots of different countries in a standard set of fields. The basic idea of a named access route (thoroughfare) which the named or numbered buildings are located on is fairly standard, except in China sometimes. Other nea...
In WPF, what are the differences between the x:Name and Name attributes?
...es not difference whether you use Name or x:Name for any type that derives from FrameworkElement (which includes most types you'd use in XAML including UserControl, a member will be generated correctly in any case). This is because FrameworkElement is decorated with [RuntimeNameProperty("Name")].
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