const names= ['John', 'Tina','Kale','Max']

function useReturnFunc(arr,fn) {

    for(let i = 0; i < arr.length; i++) {

            arr[i]= fn(arr[i]) ;

    }

    return function secondFunction(y) {

        console.log("First argument is an array: "+ arr);

        console.log("Argument passed to secondFunction is "+ y ); 

    };

} 

function argFn (name){

  return("Hello " + name );

}

useReturnFunc(names,argFn)("a string.");