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The All-in-One Guide to C++20

Solution: Erase the Capital Letters

Explore how to apply the std::erase_if algorithm with a lambda predicate to remove all capital letters from a string using C++20 container improvements. Understand the use of predicates for conditional erasure in containers.

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Solution

C++
#include <iostream>
#include <string>
int main() {
    std::string str{"Only For TesTing PurPose."};
    std::cout << "str: " << str << std::endl;
    
    std::erase_if( str, [](char c){ return std::isupper(c); });
    std::cout << "str: " << str << std::endl;
}

Applying the algorithm ...