package com.dj;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.Random;

import java.util.function.UnaryOperator;

public class Main {

private static Random random = new Random();

private record Person(String first) {

public String last(String s) {

return first + " " + s.substring(0, s.indexOf(" "));

}

}

public static void main(String[] args) {

Person tim = new Person("Tim");

String[] names = {"Anna", "Bob", "Cameron", "Donald", "Eva", "Francis"};

List<UnaryOperator<String>> list = new ArrayList<>(List.of(

String::toUpperCase,

s -> s + " " + getRandomChar('D', 'M') + ".",

s -> s + " " + reverse(s, 0, s.indexOf(" ")),

Main::reverse,

String::new,

// s -> new String("Howdy" + s),

String::valueOf,

tim::last,

(new Person("Mary"))::last

));

applyChanges(names, list);

}

private static void applyChanges(String[] names, List<UnaryOperator<String>> stringFunctions) {

List<String> backedBYArray = Arrays.asList(names);

for (var function : stringFunctions) {

backedBYArray.replaceAll(s -> s.transform(function));

System.out.println(Arrays.toString(names));

}

}

private static char getRandomChar(char startChar, char endChar) {

return (char) random.nextInt((int) startChar, (int) endChar + 1);

}

private static String reverse(String s) {

return reverse(s, 0, s.length());

}

private static String reverse(String s, int start, int end) {

return new StringBuilder(s.substring(start, end)).reverse().toString();

}

}