chore: sync-up catalog (#682)

* chore: sync-up catalog

- kata/counting-characters (beta => 8-kyu)
- kata/spacify (7-kyu => retired)
- kata/days-in-the-year (8-kyu => retired)
- kata/center-of-array (beta => retired)

* docs: sync progress

* refactor: limit class visibility to package-private

docs/README.md

@@ -1,7 +1,7 @@
 # Codewars Handbook ☕️🚀
 
 [![Views statistics +1 👀](https://img.shields.io/badge/dynamic/xml?color=success&label=views&query=//*[name()=%27text%27][3]&url=https://hits.seeyoufarm.com/api/count/incr/badge.svg?url=https%3A%2F%2Fgithub.com%2FParanoidUser%2Fcodewars-handbook)](https://hits.seeyoufarm.com/api/count/graph/dailyhits.svg?url=https://github.com/ParanoidUser/codewars-handbook)
-[![Completed kata 👌](https://img.shields.io/badge/completed%20kata-69.1%25-red.svg)](https://www.codewars.com/kata/search/java?xids=completed)
+[![Completed kata 👌](https://img.shields.io/badge/completed%20kata-68.9%25-red.svg)](https://www.codewars.com/kata/search/java?xids=completed)
 [![CI pipeline 🛠](https://img.shields.io/github/actions/workflow/status/ParanoidUser/codewars-handbook/build.yml?branch=main)](https://github.com/ParanoidUser/codewars-handbook/actions/workflows/build.yml)
 [![Quality gate 🔎](https://img.shields.io/sonar/alert_status/codewars-handbook?server=https%3A%2F%2Fsonarcloud.io)](https://sonarcloud.io/dashboard?id=codewars-handbook)
 [![Let's have a chat! 📞](https://img.shields.io/gitter/room/ParanoidUser/codewars-handbook?color=49c39e)](https://gitter.im/ParanoidUser/codewars-handbook)
@@ -25,7 +25,7 @@ slug.
 
 | [1 kyu](/kata/1-kyu/index.md) | [2 kyu](/kata/2-kyu/index.md) | [3 kyu](/kata/3-kyu/index.md) | [4 kyu](/kata/4-kyu/index.md) | [5 kyu](/kata/5-kyu/index.md) | [6 kyu](/kata/6-kyu/index.md) | [7 kyu](/kata/7-kyu/index.md) | [8 kyu](/kata/8-kyu/index.md) | [beta](/kata/beta/index.md) | [retired](/kata/retired/index.md) |
 |:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:---------------------------:|:---------------------------------:|
-| 0 | 1 | 2 | 26 | 48 | 433 | 591 | 219 | 56 | 79 |
+| 0 | 1 | 2 | 26 | 48 | 433 | 590 | 219 | 54 | 82 |
 
 **Note:** The source code is written in Java 17 and may use language features that are incompatible
 with Java 8, 11.

kata/6-kyu/guess-the-number-1/main/Guesser.java

@@ -1,4 +1,4 @@
-public class Guesser {
+class Guesser {
   private int guesses = 0;
   private Integer num;
 
@@ -33,9 +33,9 @@ final void setAnswer(int answer) {
   }
 
   @SuppressWarnings("serial")
-  public static class GameException extends RuntimeException {
+  static class GameException extends RuntimeException {
     public GameException(String msg) {
       super(msg);
     }
   }
-}
+}

kata/6-kyu/image-host-filename-generator/main/PhotoManager.java

@@ -1,7 +1,7 @@
 import java.util.HashSet;
 import java.util.Set;
 
-public class PhotoManager {
+class PhotoManager {
   private final Set<String> names = new HashSet<>();
 
   boolean nameExists(String name) {

kata/6-kyu/reverse-or-rotate/main/RevRot.java

@@ -8,7 +8,7 @@ static String revRot(String strng, int sz) {
     for (var i = 0; i <= strng.length() - sz; i += sz) {
       var chunk = new StringBuilder(strng.substring(i, sz + i));
       if (range(0, sz).mapToDouble(j -> Math.pow(chunk.charAt(j) - 48., 3)).sum() % 2 > 0) {
-        result.append(chunk.substring(1, sz)).append(chunk.charAt(0));
+        result.append(chunk, 1, sz).append(chunk.charAt(0));
       } else {
         result.append(chunk.reverse());
       }

kata/6-kyu/some-fun-with-aggregate-operations-part-4/main/Student.java

@@ -7,7 +7,7 @@ class Student {
   private final String department;
   private final Gender gender;
 
-  public enum Gender {
+  enum Gender {
     MALE, FEMALE
   }
 }

kata/6-kyu/the-enigma-machine-part-1-the-plugboard/main/InvalidPlugboardWiresException.java

@@ -1,3 +1,2 @@
-public class InvalidPlugboardWiresException extends Exception
-{
-}
+class InvalidPlugboardWiresException extends Exception {
+}

kata/7-kyu/finding-remainder-without-using-percent-operator/main/SimpleInteger.java

@@ -1,7 +1,7 @@
-public final class SimpleInteger implements Comparable<SimpleInteger> {
+final class SimpleInteger implements Comparable<SimpleInteger> {
   private final int value;
 
-  public SimpleInteger(int val) {
+  SimpleInteger(int val) {
     value = val;
   }
 
@@ -37,4 +37,4 @@ public boolean equals(Object obj) {
   public int hashCode() {
     return value ^ ((value + 1) * 31) * 31;
   }
-}
+}

kata/7-kyu/fixme-run-runner/main/ThreadUtil.java

@@ -1,4 +1,4 @@
-public final class ThreadUtil {
+final class ThreadUtil {
 
   private ThreadUtil() {}
 
@@ -12,4 +12,4 @@ static void method1() {
   static void method2() {
     id2 = Thread.currentThread().getId();
   }
-}
+}

kata/7-kyu/geometry-basics-dot-product-in-3d/main/Vector3D.java

@@ -1,8 +1,8 @@
 import lombok.AllArgsConstructor;
 
 @AllArgsConstructor
-public class Vector3D {
+class Vector3D {
   final double x;
   final double y;
   final double z;
-}
+}

kata/7-kyu/index.md

@@ -499,7 +499,6 @@
 - [Sort the Gift Code](sort-the-gift-code)
 - [Sorted? yes? no? how?](sorted-yes-no-how)
 - [Sorting the Odd way!](sorting-the-odd-way)
-- [Spacify](spacify)
 - [Special Number (Special Numbers Series #5)](special-number-special-numbers-series-number-5)
 - [Speed Control](speed-control)
 - [Speed Limit](speed-limit)

kata/7-kyu/scrabble-score/main/ScoreBoard.java

@@ -5,8 +5,7 @@
 import lombok.NoArgsConstructor;
 
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
-public class ScoreBoard {
-
+class ScoreBoard {
   private static final Map<Character, Integer> SCORE = Map.ofEntries(
       entry('E', 1),
       entry('A', 1),
@@ -36,7 +35,7 @@ public class ScoreBoard {
       entry('Z', 10)
   );
 
-  public static int getScore(char c) {
+  static int getScore(char c) {
     return SCORE.get(c);
   }
 }

kata/7-kyu/where-is-thb/main/THB.java

@@ -1,5 +1,5 @@
 class THB {
-  String testing(String initial) {
+  static String testing(String initial) {
     return initial != null ? initial.replaceAll("[^tThHbB]", "") : "";
   }
-}
+}

kata/7-kyu/where-is-thb/test/THBTest.java

@@ -0,0 +1,10 @@
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+class THBTest {
+  @Test
+  void sample() {
+    assertEquals("thhttttbbttt", THB.testing("For those of you who would like to test your solution before submitting it."));
+  }
+}

kata/8-kyu/index.md

@@ -50,10 +50,10 @@
 - [Count Odd Numbers below n](count-odd-numbers-below-n)
 - [Count of positives / sum of negatives](count-of-positives-slash-sum-of-negatives)
 - [Count the Monkeys!](count-the-monkeys)
+- [Counting Characters](counting-characters)
 - [Counting sheep...](counting-sheep-dot-dot-dot)
 - [CSV representation of array](csv-representation-of-array)
 # D
-- [Days in the year](days-in-the-year)
 - [Determine offspring sex based on genes XX and XY chromosomes](determine-offspring-sex-based-on-genes-xx-and-xy-chromosomes)
 - [Did she say hallo?](did-she-say-hallo)
 - [Difference of Volumes of Cuboids](difference-of-volumes-of-cuboids)

kata/beta/index.md

@@ -8,13 +8,11 @@
 - [Brackets Checker](brackets-checker)
 # C
 - [CaMeLcAsInG](camelcasing)
-- [Center of Array](center-of-array)
 - [Change for pizza](change-for-pizza)
 - [Check the tire pressure](check-the-tire-pressure)
 - [Consecutive Sum](consecutive-sum)
 - [Convert natural number to its binary representation](convert-natural-number-to-its-binary-representation)
 - [Count the likes](count-the-likes)
-- [Counting Characters](counting-characters)
 # D
 - [Decoding a logic transmission](decoding-a-logic-transmission)
 - [Divisible by 9?](divisible-by-9)

kata/beta/tinder-for-programmers/main/Action.java

@@ -1,4 +1,3 @@
-@FunctionalInterface
-public interface Action {
+interface Action {
   void execute();
 }

kata/retired/index.md

@@ -12,6 +12,7 @@
 # C
 - [Calculator](calculator)
 - [Carbon Dating](carbon-dating)
+- [Center of Array](center-of-array)
 - [Checking Groups](checking-groups)
 - [Collatz conjecture counter for big numbers](collatz-conjecture-counter-for-big-numbers)
 - [Convert your name to Japanese! (Game)](convert-your-name-to-japanese-game)
@@ -20,6 +21,7 @@
 - [Counting power sets](counting-power-sets)
 - [CubeSummation](cubesummation)
 # D
+- [Days in the year](days-in-the-year)
 - [Dubstep](dubstep)
 # F
 - [Filter Map Sort Practice](filter-map-sort-practice)
@@ -70,6 +72,7 @@
 - [Signal Generator](signal-generator)
 - [Simple transposition](simple-transposition)
 - [Simplified Nim - AI](simplified-nim-ai)
+- [Spacify](spacify)
 - [Squash the bugs](squash-the-bugs)
 - [Stop Donald Trump (2015)](stop-donald-trump-2015)
 - [String Product](string-product)

kata/retired/load-value-from-system-variable/test/hello/Application.java

@@ -4,7 +4,7 @@
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
-public class Application {
+class Application {
   public static void main(String[] args) {
     SpringApplication.run(Application.class, args);
   }

kata/retired/multiline-string-maker/test/MultilineTest.java

@@ -12,13 +12,13 @@ void fixedTest1() {
 
   @Test
   void fixedTest2() {
-    String c = "String a=\"public class Cake\\n\"+\n\"{\\n\"+\n\"	private double price;\\n\"+\n\"	private String color;\\n\"+\n\"	public Cake(double price, String color)\\n\"+\n\"	{\\n\"+\n\"		this.price=price;\\n\"+\n\"		this.color=color;\\n\"+\n\"	}\\n\"+\n\"	public double getPrice()\\n\"+\n\"	{\\n\"+\n\"		return price;\\n\"+\n\"	}\\n\"+\n\"	public void setPrice(double price)\\n\"+\n\"	{\\n\"+\n\"		this.price=price;\\n\"+\n\"	}\\n\"+\n\"	public String getColor()\\n\"+\n\"	{\\n\"+\n\"		return color;\\n\"+\n\"	}\\n\"+\n\"	public void setColor(String color)\\n\"+\n\"	{\\n\"+\n\"		this.color=color;\\n\"+\n\"	}\\n\"+\n\"	public String toString()\\n\"+\n\"	{\\n\"+\n\"		return \\\"Price: \\\"+price+\\\"\\\\n\\\"\\n\"+\n\"			+\\\"Color: \\\"+color;\\n\"+\n\"	}\\n\"+\n\"}\";";
-    assertEquals(c, MultilineMaker.make("a", "public class Cake\n{\n	private double price;\n	private String color;\n	public Cake(double price, String color)\n	{\n		this.price=price;\n		this.color=color;\n	}\n	public double getPrice()\n	{\n		return price;\n	}\n	public void setPrice(double price)\n	{\n		this.price=price;\n	}\n	public String getColor()\n	{\n		return color;\n	}\n	public void setColor(String color)\n	{\n		this.color=color;\n	}\n	public String toString()\n	{\n		return \"Price: \"+price+\"\\n\"\n			+\"Color: \"+color;\n	}\n}"));
+    String c = "String a=\"class Cake\\n\"+\n\"{\\n\"+\n\"	private double price;\\n\"+\n\"	private String color;\\n\"+\n\"	public Cake(double price, String color)\\n\"+\n\"	{\\n\"+\n\"		this.price=price;\\n\"+\n\"		this.color=color;\\n\"+\n\"	}\\n\"+\n\"	public double getPrice()\\n\"+\n\"	{\\n\"+\n\"		return price;\\n\"+\n\"	}\\n\"+\n\"	public void setPrice(double price)\\n\"+\n\"	{\\n\"+\n\"		this.price=price;\\n\"+\n\"	}\\n\"+\n\"	public String getColor()\\n\"+\n\"	{\\n\"+\n\"		return color;\\n\"+\n\"	}\\n\"+\n\"	public void setColor(String color)\\n\"+\n\"	{\\n\"+\n\"		this.color=color;\\n\"+\n\"	}\\n\"+\n\"	public String toString()\\n\"+\n\"	{\\n\"+\n\"		return \\\"Price: \\\"+price+\\\"\\\\n\\\"\\n\"+\n\"			+\\\"Color: \\\"+color;\\n\"+\n\"	}\\n\"+\n\"}\";";
+    assertEquals(c, MultilineMaker.make("a", "class Cake\n{\n	private double price;\n	private String color;\n	public Cake(double price, String color)\n	{\n		this.price=price;\n		this.color=color;\n	}\n	public double getPrice()\n	{\n		return price;\n	}\n	public void setPrice(double price)\n	{\n		this.price=price;\n	}\n	public String getColor()\n	{\n		return color;\n	}\n	public void setColor(String color)\n	{\n		this.color=color;\n	}\n	public String toString()\n	{\n		return \"Price: \"+price+\"\\n\"\n			+\"Color: \"+color;\n	}\n}"));
   }
 
   @Test
   void fixedTest3() {
-    String c = "String a=\"public class ID\\n\"+\n\"{\\n\"+\n\"	private String name;\\n\"+\n\"	private int idNumber;\\n\"+\n\"	private boolean expired;\\n\"+\n\"	public ID(String name, int idNumber, boolean expired)\\n\"+\n\"	{\\n\"+\n\"		this.name=name;\\n\"+\n\"		this.idNumber=idNumber;\\n\"+\n\"		this.expired=expired;\\n\"+\n\"	}\\n\"+\n\"	public String getName()\\n\"+\n\"	{\\n\"+\n\"		return name;\\n\"+\n\"	}\\n\"+\n\"	public void setName(String name)\\n\"+\n\"	{\\n\"+\n\"		this.name=name;\\n\"+\n\"	}\\n\"+\n\"	public int getIdNumber()\\n\"+\n\"	{\\n\"+\n\"		return idNumber;\\n\"+\n\"	}\\n\"+\n\"	public void setIdNumber(int idNumber)\\n\"+\n\"	{\\n\"+\n\"		this.idNumber=idNumber;\\n\"+\n\"	}\\n\"+\n\"	public boolean getExpired()\\n\"+\n\"	{\\n\"+\n\"		return expired;\\n\"+\n\"	}\\n\"+\n\"	public void setExpired(boolean expired)\\n\"+\n\"	{\\n\"+\n\"		this.expired=expired;\\n\"+\n\"	}\\n\"+\n\"	public String toString()\\n\"+\n\"	{\\n\"+\n\"		return \\\"Name: \\\"+name+\\\"\\\\n\\\"\\n\"+\n\"			+\\\"Id Number: \\\"+idNumber+\\\"\\\\n\\\"\\n\"+\n\"			+\\\"Expired: \\\"+expired;\\n\"+\n\"	}\\n\"+\n\"}\";";
-    assertEquals(c, MultilineMaker.make("a", "public class ID\n{\n	private String name;\n	private int idNumber;\n	private boolean expired;\n	public ID(String name, int idNumber, boolean expired)\n	{\n		this.name=name;\n		this.idNumber=idNumber;\n		this.expired=expired;\n	}\n	public String getName()\n	{\n		return name;\n	}\n	public void setName(String name)\n	{\n		this.name=name;\n	}\n	public int getIdNumber()\n	{\n		return idNumber;\n	}\n	public void setIdNumber(int idNumber)\n	{\n		this.idNumber=idNumber;\n	}\n	public boolean getExpired()\n	{\n		return expired;\n	}\n	public void setExpired(boolean expired)\n	{\n		this.expired=expired;\n	}\n	public String toString()\n	{\n		return \"Name: \"+name+\"\\n\"\n			+\"Id Number: \"+idNumber+\"\\n\"\n			+\"Expired: \"+expired;\n	}\n}"));
+    String c = "String a=\"class ID\\n\"+\n\"{\\n\"+\n\"	private String name;\\n\"+\n\"	private int idNumber;\\n\"+\n\"	private boolean expired;\\n\"+\n\"	public ID(String name, int idNumber, boolean expired)\\n\"+\n\"	{\\n\"+\n\"		this.name=name;\\n\"+\n\"		this.idNumber=idNumber;\\n\"+\n\"		this.expired=expired;\\n\"+\n\"	}\\n\"+\n\"	public String getName()\\n\"+\n\"	{\\n\"+\n\"		return name;\\n\"+\n\"	}\\n\"+\n\"	public void setName(String name)\\n\"+\n\"	{\\n\"+\n\"		this.name=name;\\n\"+\n\"	}\\n\"+\n\"	public int getIdNumber()\\n\"+\n\"	{\\n\"+\n\"		return idNumber;\\n\"+\n\"	}\\n\"+\n\"	public void setIdNumber(int idNumber)\\n\"+\n\"	{\\n\"+\n\"		this.idNumber=idNumber;\\n\"+\n\"	}\\n\"+\n\"	public boolean getExpired()\\n\"+\n\"	{\\n\"+\n\"		return expired;\\n\"+\n\"	}\\n\"+\n\"	public void setExpired(boolean expired)\\n\"+\n\"	{\\n\"+\n\"		this.expired=expired;\\n\"+\n\"	}\\n\"+\n\"	public String toString()\\n\"+\n\"	{\\n\"+\n\"		return \\\"Name: \\\"+name+\\\"\\\\n\\\"\\n\"+\n\"			+\\\"Id Number: \\\"+idNumber+\\\"\\\\n\\\"\\n\"+\n\"			+\\\"Expired: \\\"+expired;\\n\"+\n\"	}\\n\"+\n\"}\";";
+    assertEquals(c, MultilineMaker.make("a", "class ID\n{\n	private String name;\n	private int idNumber;\n	private boolean expired;\n	public ID(String name, int idNumber, boolean expired)\n	{\n		this.name=name;\n		this.idNumber=idNumber;\n		this.expired=expired;\n	}\n	public String getName()\n	{\n		return name;\n	}\n	public void setName(String name)\n	{\n		this.name=name;\n	}\n	public int getIdNumber()\n	{\n		return idNumber;\n	}\n	public void setIdNumber(int idNumber)\n	{\n		this.idNumber=idNumber;\n	}\n	public boolean getExpired()\n	{\n		return expired;\n	}\n	public void setExpired(boolean expired)\n	{\n		this.expired=expired;\n	}\n	public String toString()\n	{\n		return \"Name: \"+name+\"\\n\"\n			+\"Id Number: \"+idNumber+\"\\n\"\n			+\"Expired: \"+expired;\n	}\n}"));
   }
 }