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@@ -1,7 +1,82 @@
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package com.zipcodewilmington.arrayutility;
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+import java.lang.reflect.Array;
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+
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/**
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* Created by leon on 3/6/18.
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*/
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-public class ArrayUtility {
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+public class ArrayUtility<T> {
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+
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+ public T[] inputArray;
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+
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+
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+ public ArrayUtility(T[] inputArray) {
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+ this.inputArray =inputArray;
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+ }
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+
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+
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+ public T[] mergeArrays(T[] inputArray, T[] arrayToMerge) {
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+
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+ T[] mergedArray = (T[])Array.newInstance(inputArray.getClass().getComponentType(),
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+ inputArray.length + arrayToMerge.length);
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+
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+ System.arraycopy(inputArray, 0 , mergedArray, 0 , inputArray.length);
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+ System.arraycopy(arrayToMerge, 0, mergedArray, inputArray.length, arrayToMerge.length);
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+ return mergedArray;
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+ }
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+
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+
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+ public Integer countDuplicatesInMerge(T[] arrayToMerge, T valueToEvaluate) {
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+
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+ T[] mergedArray = mergeArrays(inputArray, arrayToMerge);
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+ Integer countValueToEvaluate =0;
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+
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+ for (int i = 0; i < mergedArray.length; i++) {
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+ if (mergedArray[i] == valueToEvaluate)
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+ countValueToEvaluate ++;
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+ }
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+ return countValueToEvaluate;
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+ }
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+
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+
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+ public T[] removeValue(T valueToRemove) {
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+
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+ T[] arrayWithValueRemoved = (T[])Array.newInstance(inputArray.getClass().getComponentType(),
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+ inputArray.length - getNumberOfOccurrences(valueToRemove));
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+
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+ int count = 0;
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+
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+ for (int i = 0; i < inputArray.length; i++) {
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+ if (!inputArray[i].equals(valueToRemove)) {
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+ arrayWithValueRemoved[count] = inputArray[i];
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+ count++;
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+ }
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+ }
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+ return arrayWithValueRemoved;
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+ }
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+
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+ public Integer getNumberOfOccurrences(T valueToEvaluate) {
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+ Integer occurrences = 0;
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+ for (int i = 0; i <inputArray.length; i++) {
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+ if (inputArray[i].equals(valueToEvaluate)) {
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+ occurrences++;
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+ }
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+ }
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+ return occurrences;
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+
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+ }
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+
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+ public T getMostCommonFromMerge(T[] arrayToMerge) {
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+ T[] mergedArray = mergeArrays(inputArray, arrayToMerge);
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+ T mostCommon = null;
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+ Integer count= 0;
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+ for (int i = 0; i < mergedArray.length; i++) {
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+ if (count <= getNumberOfOccurrences(mergedArray[i])) {
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+ mostCommon = mergedArray[i];
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+ count = getNumberOfOccurrences(mergedArray[i]);
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+ }
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+ }
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+ return mostCommon;
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+
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+ }
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}
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