/* ⚡⚡$___CHALLENGE___$⚡⚡ The GOAL is to create custom filter() and map() functions...easy ey!? All Languages Are Warmly Welcome! Note: The functions must be Generic and they should work for at least one sequential container. Good Luck! My Try: https://code.sololearn.com/cBG0scx1ifUW/#py */ #include #include template std::vector _filter( std::vector& input , Func func ) { std::vector output ; for( typename std::vector::iterator it = input.begin() ; it != input.end() ; ++it ) if ( func( *it ) ) output.push_back( *it ); return output ; } template std::vector _map( std::vector& input , Func func ) { std::vector output ; for( typename std::vector::iterator it = input.begin() ; it != input.end() ; ++it ) output.push_back( func( *it ) ); return output ; } template void printVector( std::vector& input ) { std::cout<<"[ "; for ( size_t it = 0 ; it < ( input.size() - 1 ) ; ++it ) std::cout<< input[ it ] << " , " ; std::cout<< input.back() << " ]" << std::endl; } int main() { std::vector dataInt = { 1 , 2 , 3 , 4 , 5 , 61 , 72 , 83 , 94 , 105 }; std::vector dataFloat = { 1.67 , 0.3 , 3.987 , 4.0 , 0.70 , 54.6 , 3456.1 , 0.6 }; std::vector dataChar = { 'a' , 'b' , 'c' , 'd' , '&' , '#' , '!' , 'A' , '1' , '2' , '3' }; auto isPair = []( int x ) { return ( 0 == x % 2 ) ;}; auto isAboveZero = []( float x ) { return ( 1 < x ) ;}; auto isLetter = []( char x ) { return ( 65 <= x && 90 >= x || 97 <= x && 122 >= x ) ;}; std::vector pairs = _filter( dataInt , isPair ); std::cout<< " _filter::" << "find among:\n"; printVector( dataInt ); std::cout<< std::endl << "Result: "; printVector( pairs ); std::cout<< std::endl << std::endl; auto square = []( int x) { return ( x * x ) ;}; std::vector squared = _map( dataInt , square ); std::cout<< " _map::" << " data above: \n"; printVector( squared ); std::cout<< std::endl << std::endl; std::cout<< "\nSome examples..\n\n"; std::vector aboveZero = _filter( dataFloat , isAboveZero ); std::cout<< " _filter::" << "find among:\n "; printVector( dataFloat ); std::cout<< std::endl << "Result: "; printVector( aboveZero ); std::cout<< std::endl << std::endl; std::vector letters = _filter( dataChar , isLetter ); std::cout<< " _filter::" << "find letters among:\n"; printVector( dataChar ); std::cout<< std::endl << "Result: "; printVector( letters ); std::cout<< std::endl << std::endl; // auto capitalize = []( char x ){ if ( 97 <= x && 122 >= x ) x -= 32 ; return x ;}; letters = _map( letters , []( char x ){ if ( 97 <= x && 122 >= x ) x -= 32 ; return x ;} ); std::cout<< " _map::" << " letters finded:\n"; printVector( letters ); std::cout<< std::endl; return 0; }