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Calling class staticmethod within the class body?
...2E3CBA8>
>>> dir(z)
['__class__', '__delattr__', '__doc__', '__format__', '__func__', '__get__', '__getattribute__', '__hash__', '__init__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__']
>>> z.__func__
<funct...
How to modify a global variable within a function in bash?
...unc() {
echo "Hello"
}
var="$(myfunc)"
echo "$var"
Gives:
Hello
For a numerical value from 0-255, you can use return to pass the number as the exit status:
mysecondfunc() {
echo "Hello"
return 4
}
var="$(mysecondfunc)"
num_var=$?
echo "$var - num is $num_var"
Gives:
Hello - ...
What is the preferred/idiomatic way to insert into a map?
...r functions are not functionally equivalent :
The operator[] will search for the key, insert a default constructed value if not found, and return a reference to which you assign a value. Obviously, this can be inefficient if the mapped_type can benefit from being directly initialized instead of de...
How to add property to a class dynamically?
...a thing called a descriptor. It's an object that provides custom handling for a given attribute, on a given class. Kinda like a way to factor a huge if tree out of __getattribute__.
When I ask for foo.b in the example above, Python sees that the b defined on the class implements the descriptor pr...
Can I redirect the stdout in python into some sort of string buffer?
...
I think there is no need to add try/finally block for this solution.
– snr
Jul 16 '18 at 14:50
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Convert a String In C++ To Upper Case
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This appears to perform extremely badly with g++ 5.2 -O3, and Boost 1.58 (like 30x worse than calling glibc's toupper in a loop.) There's a dynamic_cast of the locale that doesn't get hoisted out of the per-char loop. See my answer. On the p...
How to get a reference to a module inside the module itself?
...
except for this won't be quite correct if module is reloaded; I don't think there's any place where a reference is guaranteed to be kept, if there was, reloading wouldn't really work, right?
– Dima Tisnek
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Why do people use __(double underscore) so much in C++
...dations :
The use of two underscores (`__') in identifiers is reserved for the compiler's internal use according to the ANSI-C standard.
Underscores (`_') are often used in names of library functions (such as "_main" and "_exit"). In order to avoid collisions, do not begin an identifier wit...
Explaining Python's '__enter__' and '__exit__'
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@Grief : For 2 reasons, In my opinion, 1) i won't be able to call other methods on self object as explained here : stackoverflow.com/questions/38281853/… 2) self.XYZ is just part of self object and returning handle only to just tha...
Run function from the command line
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For some reason, this didn't work for me, while replacing print foo.hello() with print(foo.hello()) did. I don't have the python knowledge to explain why this is, so if someone else could explain what can be going on, that wo...