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What are rvalues, lvalues, xvalues, glvalues, and prvalues?
... longer say that SomeType&& means the same thing everwhere. You've now made a distinction between named rvalue references and unnamed rvalue references. Well, named rvalue references are lvalues; that was our solution above. So what do we call unnamed rvalue references (the return value from...
Should I use 'has_key()' or 'in' on Python dicts?
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has_key() is now removed in Python 3
– Vadim Kotov
Nov 14 '19 at 15:21
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Use of #pragma in C
... thread 3
Note that the order of output can vary on different machines.
now let me tell you what #pragma did...
it tells the OS to run the some block of code on 4 threads
this is just one of many many applications you can do with the little #pragma
sorry for the outside sample OpenMP
...
Extracting text OpenCV
...s thinking of counting the number of bars, and imposing a threshold on it. Now I think, if the region is clean enough, it may also help if we can feed it to an OCR and get a confidence level for each detected character to be sure that the region contains text.
– dhanushka
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How can I create directory tree in C++/Linux?
...an only show the
presence of bugs, never their absence).
The code shown is now v1.16; there have been cosmetic or administrative
changes made since v1.13 (such as use mkpath.h instead of jlss.h and
include <unistd.h> unconditionally in the test code only).
It's reasonable to argue that "syssta...
How to decorate a class?
...consider a subclass instead of the approach you've outlined. However, not knowing your specific scenario, YMMV :-)
What you're thinking of is a metaclass. The __new__ function in a metaclass is passed the full proposed definition of the class, which it can then rewrite before the class is created. ...
How to plot two columns of a pandas data frame using points?
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Now in latest pandas you can directly use df.plot.scatter function
df = pd.DataFrame([[5.1, 3.5, 0], [4.9, 3.0, 0], [7.0, 3.2, 1],
[6.4, 3.2, 1], [5.9, 3.0, 2]],
columns=['length', 'width...
What are C++ functors and their uses?
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int operator()(int y) const { return x + y; }
private:
int x;
};
// Now you can use it like this:
add_x add42(42); // create an instance of the functor class
int i = add42(8); // and "call" it
assert(i == 50); // and it added 42 to its argument
std::vector<int> in; // assume this conta...
How to clear the interpreter console?
...mport os
def cls():
os.system('cls' if os.name=='nt' else 'clear')
# now, to clear the screen
cls()
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ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
...rent for different routers though, so look up directions for your router.
Now, when I am outside of my home network I connect to my pi by typing:
ssh pi@[hostname]
Then I am able to input my password and connect.
sh...