Various Code Tests

gistfile1.txt

package mx.com.insigniait.scriptum.controllers;

import java.util.Arrays;
import java.util.List;
import java.util.function.Function;
import java.util.stream.Collectors;

/**
 * @author Doni, 10/07/2023 10:10:21
 *
 */
public class TestClass {

	public static void main(String[] args) {
		System.out.println("isAnagram= " + isAnagram(4280, 7024));
	}
	
	/**
	 * Checks if a number is an anagram of another
	 * @param i
	 * @param j
	 */
	private static boolean isAnagram(int number1, int number2) {
		
		String word1 = Integer.toString(number1);
		String word2 = Integer.toString(number2);
		
		if(word1.length() != word2.length()) return false;
		
		for(int i = 0; i < word1.length(); i++) {
			
			char currentChar = word1.charAt(i);
			int indexOfLetter = word2.indexOf(currentChar);
			
			if(indexOfLetter == -1) return false;
			
			StringBuilder sb = new StringBuilder(word2);
			sb.deleteCharAt(indexOfLetter);
			word2 = sb.toString();
		}
		
		return word2.length() == 0;
	}

	/**
	 * Swaps without using a third variable
	 * @param x
	 * @param y
	 */
	public static void swapNumbers(int x, int y) {
		
		// For y = 5, x = 3
		y = y + x; // y = 8
		x = y - x; // x = 5
		y = y - x; // y = 3
		
		System.out.println("x= " + x);
		System.out.println("y= " + y);
	}

	/**
	 * Sums the non-repeated numbers from an array
	 * @param numbers
	 */
	public static void sumNonRepeatedNumbers(List<Integer> numbers) {
		
		Integer sum = numbers
				.stream()
				.collect(Collectors.groupingBy(Function.identity()))
				.entrySet()
				.stream()
				.filter(x -> x.getValue().size() == 1)
				.map(x -> x.getKey())
				.reduce((el, acc) -> acc + el)
				.orElse(0);
		
		System.out.println(sum);
	}
}