Category : functional-programming

In the for loop following code snippet I’m trying apply views::filter . But it results in type miss match and assignment error. #include <iostream> #include <vector> #include <numeric> #include <range/v3/all.hpp> int main() { int limit =100; std::vector<int> numbers(100); std::iota(numbers.begin(), numbers.end(), 1); auto results = numbers | ranges::views::filter([](int n) {return n != 1; }); int sqrt_limit ..

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I am trying to call a function using a std::map key value pair. I found this stackoverflow article Calling a function depending on a variable? but the solution std::map<std::string, std::function<void()>> le_mapo; does not work and results in a error something like "error: lvalue required as unary ‘&’ operand" using it as so std::map<std::string, std::function<void()>> le_mapo; ..

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I am trying to call a function using a std::map key value pair. I found this stackoverflow article Calling a function depending on a variable? but the solution std::map<std::string, std::function<void()>> le_mapo; does not work and results in a error something like "error: lvalue required as unary ‘&’ operand" using it as so std::map<std::string, std::function<void()>> le_mapo; ..

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#include <functional> bool f1(int a, int b) { return true; } int main() { // This compiles std::function<bool()> f2 = std::function<bool()>(std::bind(f1, 1, 2)); std::function<bool()> f1 = f2; // These don’t compile //std::function<bool()> f1 = std::function<bool()>(std::bind(f1, 1, 2)); //std::function<bool()> f1 = std::bind(f1, 1, 2); //std::function<bool()> f1(std::bind(f1, 1, 2)); } I was trying to overload f1 by ..

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#include <functional> bool f1(int a, int b) { return true; } int main() { // This compiles std::function<bool()> f2 = std::function<bool()>(std::bind(f1, 1, 2)); std::function<bool()> f1 = f2; // These don’t compile //std::function<bool()> f1 = std::function<bool()>(std::bind(f1, 1, 2)); //std::function<bool()> f1 = std::bind(f1, 1, 2); //std::function<bool()> f1(std::bind(f1, 1, 2)); } I was trying to overload f1 by ..

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