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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...
What is the definition of “interface” in object oriented programming
...you are projecting your expected semantics into an interface. For all you know, the TV could just explode when you plug it in. However, based on its "interface" you can assume that it won't make any coffee since it doesn't have a water intake.
In object oriented programming, an interface generally...
How to read a file in reverse order?
...ek() is never encoding-aware, read() is if you open the file in text mode. Now if have 'aöaö' * 1000000, your blocks will not be aligned correctly.
– norok2
Nov 14 '18 at 13:25
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How can I force division to be floating point? Division keeps rounding down to 0?
... integer values a and b , but I need their ratio in floating point. I know that a < b and I want to calculate a / b , so if I use integer division I'll always get 0 with a remainder of a .
...
How to match “any character” in regular expression?
...) {
System.out.println(test + " " +test.matches(".+123"));
}
Now you can easily add new testcases and try new patterns. Have fun exploring regex.
See also
regular-expressions.info/Tutorial
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What are C++ functors and their uses?
...
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...
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...
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 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...