refactor: clean some code

Author: Flashky

src/main/java/com/adventofcode/flashk/day07/Equation.java

@@ -1,6 +1,5 @@
 package com.adventofcode.flashk.day07;
 
-import lombok.Getter;
 import org.apache.commons.lang3.StringUtils;
 
 import java.util.Arrays;
@@ -11,14 +10,14 @@
 public class Equation {
 
     private final long result;
-    private final Deque<Integer> operators;
+    private final Deque<Integer> numbers;
     private boolean concatenate;
 
     public Equation(String input) {
         String[] inputParts = input.split(": ");
         result = Long.parseLong(inputParts[0]);
-        operators = Arrays.stream(inputParts[1].split(StringUtils.SPACE)).map(Integer::valueOf)
-                .collect(Collectors.toCollection(ArrayDeque::new));
+        numbers = Arrays.stream(inputParts[1].split(StringUtils.SPACE)).map(Integer::valueOf)
+                        .collect(Collectors.toCollection(ArrayDeque::new));
     }
 
     public long solve(boolean concatenate) {
@@ -28,25 +27,25 @@ public long solve(boolean concatenate) {
 
     private boolean hasSolution(long partialResult) {
 
-        if(operators.isEmpty()) {
+        if(numbers.isEmpty()) {
             return partialResult == result;
         } else if(partialResult > result) {
             return false;
         }
 
-        Integer currentOperator = operators.poll();
-        boolean hasSolution = hasSolution(partialResult + currentOperator);
+        Integer number = numbers.poll();
+        boolean hasSolution = hasSolution(partialResult + number);
 
         if(!hasSolution) {
-            hasSolution = hasSolution(partialResult * currentOperator);
+            hasSolution = hasSolution(partialResult * number);
         }
 
         if(!hasSolution && concatenate) {
-            long concatenatedPartialResult = Long.parseLong(String.valueOf(partialResult) + currentOperator);
+            long concatenatedPartialResult = Long.parseLong(String.valueOf(partialResult) + number);
             hasSolution = hasSolution(concatenatedPartialResult);
         }
 
-        operators.addFirst(currentOperator);
+        numbers.addFirst(number);
 
         return hasSolution;
     }

src/main/java/com/adventofcode/flashk/day09/DiskDefragmenter.java

@@ -12,7 +12,7 @@ public class DiskDefragmenter {
 
     public DiskDefragmenter(List<String> inputs){
 
-        char[] diskMap = inputs.get(0).toCharArray();
+        char[] diskMap = inputs.getFirst().toCharArray();
         int fileId = 0;
         int blockIndex = 0;
 

src/main/java/com/adventofcode/flashk/day09/DiskFragmenter.java

@@ -10,7 +10,7 @@ public class DiskFragmenter {
 
     public DiskFragmenter(List<String> inputs) {
 
-        char[] diskMap = inputs.get(0).toCharArray();
+        char[] diskMap = inputs.getFirst().toCharArray();
         int fileId = 0;
         int lastBlockIndex = 0;
 

src/main/java/com/adventofcode/flashk/day11/PlutonianPebbles.java

@@ -6,6 +6,7 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
@@ -41,7 +42,7 @@ private void blink() {
                 updateNumber(1L, rockCount, processedRocks);
             } else if(digits % 2 == 0) {
                 String strNumber = String.valueOf(number);
-                
+
                 String strNumberLeft = strNumber.substring(0, strNumber.length() / 2);
                 updateNumber(Long.parseLong(strNumberLeft), rockCount, processedRocks);