I want to learn PYTHON . From where can I get the best source- udemy, edx,Udacity , YouTube etc which one ?
Yes
klimi
Talula
I want to learn PYTHON . From where can I get the best source- udemy, edx,Udacity , YouTube etc which one ?
Why do you want to learn Python? Are you an engineer?
Ayan
Yes
Mark
I want to learn PYTHON . From where can I get the best source- udemy, edx,Udacity , YouTube etc which one ?
best way to learn is to find a new project idea, find a way how to implement it in language you'd like to learn
Mark
and that's how you'll master programming languages
Singh
👍
Anonymous
hey, i have e template class, and i want a member function to be declared and defined if some condition is true, otherwise it shouldn't be implemented.
I tried std::enable_if<...> in different ways but couldn't do that,
example:
template <typename Type>
class Foo
{
public:
void Specific(); // enable if ..
void General();
}
and i want void Specific() to be implemented if std::is_default_constructible<Type>::value, otherwise, Foo shouldn't have any void Specific() function. In either way, the void General() function should be implemented.
BinaryByter
https://github.com/Wittmaxi/webcpp/blob/master/src/header/base_traits.hpp
BinaryByter
look at how I used enable_if there
BinaryByter
Anonymous
mine is a template class
BinaryByter
it works as well
Anonymous
but let me try
BinaryByter
maybe add a standard template argument
BinaryByter
for example
BinaryByter
template<class A, typename std::enable_if <true, int>::type a = 0>
class myweirdtemplatedclassthatIloveimplementing {
};
Anonymous
template<class A, typename std::enable_if <true, int>::type a = 0>
class myweirdtemplatedclassthatIloveimplementing {
};
Cool name :D, but it's a member function that i want to enable_if
BinaryByter
what does that mean?
BinaryByter
what does it mean to enable a function if something is?
BinaryByter
either the entire class is valid or it isnt
BinaryByter
you will have to make two different classes
Anonymous
it means that Foo<int> has the Specific function but Foo<weird> doesn't
BinaryByter
use template specializsation
Anonymous
you will have to make two different classes
so it will be lots of classes, cuz i have multiple enable_if s
Anonymous
i wish they added this feature :D
Anonymous
thanks!
Anonymous
like overloading ++ for those types that have ++ overloaded and so on
Anonymous
so i shouldn't write: var = var + 1; instead of var++;
BinaryByter
1) use ++var, its faster
BinaryByter
you can have different overloads for different types
BinaryByter
just overload the operator inside of the type
BinaryByter
var++ is not that much easier
BinaryByter
but if it floats your boat ¯\_(ツ)_/¯
Prometheus
var++?
Anonymous
compiler will optimize it 🤔 var++ is easier for eyes
it will not actually in cases the ++ is overloaded
Anonymous
var++ is not that much easier
because we usually write the thing we modify at the left hand side and the operation is in the rest of the line.
Prometheus
Yeah lol I realized
olli
++var over var++
that's what i always said .... :D
Unless you need the side effect from the postfix
Prometheus
I was looking at the wrong group when I typed that. Thought it was part of another convo
BinaryByter
klimi
Yes
olli
Btw.. SFINAE does not work on member functions
to be more precise / correct.. SFINAE works only for deduced template arguments
BinaryByter
Btw.. SFINAE does not work on member functions
to be more precise / correct.. SFINAE works only for deduced template arguments
which is what I wanted to tell her
Anonymous
and it's needed..
Anonymous
what is needed
Anonymous
SFINAE for member functions
BinaryByter
how?
BinaryByter
that would make two classes completely different
Anonymous
just one
Anonymous
yep
Anonymous
and that's the goal
Anonymous
these functions are not found in the source code
Anonymous
with some exceptions