I would like to know if the space reserved for the name is also released when releasing the pointer
yes, since name is completely contained in the User struct.
olli
Anonymous
/get c++
Anonymous
/get anynotes
Mp
anyone knows data structure?
Mp
can i message u in pv?
Artöm
Please no
Mp
Mp
sort the table after 0(f(n) efficiency
Artöm
Do you know how to compare classes of functions like log and linear?
Artöm
Or do you know how to calculate a limit?
Mp
no
Mp
what is the step?
Artöm
The you should just memorize it
Artöm
Const is the best, then log, then linear, then powers > 1, then exponent, then factorial
Artöm
If you have like n^2 vs nlogn, its same as n vs logn
Artöm
This is math btw, not programming per se
Mp
thanki very much
Mp
one more question
Mp
Mp
it says write 0()efficiency for each algorithm
Mp
what should i do?
Mp
What do u mean?
Alex
it says write 0()efficiency for each algorithm
calculate it: how many times do you visit each element. if one - is O(N), if zero - const etc
Mp
like i dont understand
Mp
how to calculate it
Alex
https://www.amazon.com/Algorithms-Parts-1-4-Fundamentals-Structure/dp/0201350882
Alex
in this book you can find examples how to calculate
Alex
or google how to calculate
Mp
i should google to calculate what????
Alex
O for complexity algorithm
Alex
it says write 0()efficiency for each algorithm
Mp
i couldnt find anything on google
Mp
could u please provide somelink for that?
Веселый Роджер
heya, can i have some advice pls.
I need to use the write() functions to out put a char array of 3 elements. How to i do that?
Alex
write(fd, arr, sizeof(char) * 3)
Pavel
Will copy elision (NRVO) be performed in C++17+ if the function have multiple returns that return the same variable.
like this
MyClass foo() {
MyClass result;
if (precondition.fail()) { return result; }
...
return result;
}
olli
Will copy elision (NRVO) be performed in C++17+ if the function have multiple returns that return the same variable.
like this
MyClass foo() {
MyClass result;
if (precondition.fail()) { return result; }
...
return result;
}
I would assume most compilers will perform the copy ellision, C++17 does not guarantee it tho
Pavel
I would assume most compilers will perform the copy ellision, C++17 does not guarantee it tho
OK, at least something, thanks :)
Nils
for (const auto& channeldesc : channels + 1)
Is that the correct way to start iteration at second element?
Alex
show declaration of channels please
Artöm
Anonymous
for (const auto& channeldesc : channels + 1)
Is that the correct way to start iteration at second element?
there is no way to do that with a range based for loop (at least not in C++17)
Anonymous
use a normal loop
Nils
vector<string> + 1 is not the second element
I thought, because it's some kind of pointer but seems like iterators are too different
Anonymous
oh
Alex
I thought, because it's some kind of pointer but seems like iterators are too different
iterator is vector.begin(), but you use (vector+1).begin(), I suppose it won`t compile
Anonymous
how?
数学の恋人
you do vector.begin()+1
Anonymous
oh lol
数学の恋人
that would be overkill tbh
数学の恋人
why not just go for iterators instead of that
数学の恋人
yeah I got you
Nils
how would the following code which is written in python look like in C++:
channel_id, channel_name = channeldesc.split(' ')
?
Nils
Is that even possible?
Nils
thx
Alex
how would the following code which is written in python look like in C++:
channel_id, channel_name = channeldesc.split(' ')
?
or you can use std::pair if not c++17
数学の恋人
how would the following code which is written in python look like in C++:
channel_id, channel_name = channeldesc.split(' ')
?
I don't know python, but I assume it converts a string like,
AB123 Chanol to AB123 and Chanol
where channel_id = AB123 and channel_name = Chanol
数学の恋人
if so, maybe std::basic_stringstream can help
数学の恋人
to split strings there is boost::split
Just an alternative
std::string combined{"AB123 Chanol"};
std::stringstream line(combined);
std::string channel_id;
std::string channel_name;
while(line.good()) {
line >> channel_id;
line >> channel_name;
}
Nils
I solved it already
Nils
but thx for your affort
Nils
would you mind telling how?
thischannel.id = channeldesc[0];
thischannel.name = channeldesc[1];
It looks cleaner tbh
数学の恋人
thischannel.id = channeldesc[0];
thischannel.name = channeldesc[1];
It looks cleaner tbh
maybe your structure was different
数学の恋人
I assumed it to be a string
Nils
Why does std::string::erase(0) clear the entire string?
Nils
I just want to remove the first character
Alex
Why does std::string::erase(0) clear the entire string?
string& erase (size_t pos = 0, size_t len = npos);
Sameer
Hello Guys
Sameer
What is inline function and when and where is used.