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+          <caret line="103" column="7" lean-forward="true" selection-start-line="103" selection-start-column="7" selection-end-line="103" selection-end-column="7" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_191.jdk/Contents/Home/src.zip!/java/util/function/IntFunction.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="405">
+          <caret line="50" lean-forward="true" selection-start-line="50" selection-end-line="50" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="jar:///Library/Java/JavaVirtualMachines/jdk1.8.0_191.jdk/Contents/Home/src.zip!/java/lang/Integer.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="420">
+          <caret line="51" column="19" selection-start-line="51" selection-start-column="19" selection-end-line="51" selection-end-column="19" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/OddEven.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="435">
+          <caret line="29" column="19" selection-start-line="29" selection-start-column="19" selection-end-line="29" selection-end-column="19" />
+          <folding>
+            <element signature="e#249#250#0" expanded="true" />
+            <element signature="e#279#280#0" expanded="true" />
+            <element signature="e#528#529#0" expanded="true" />
+            <element signature="e#555#556#0" expanded="true" />
+            <element signature="e#592#593#0" expanded="true" />
+            <element signature="e#618#619#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/pom.xml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="390">
+          <caret line="26" column="21" lean-forward="true" selection-start-line="26" selection-start-column="21" selection-end-line="26" selection-end-column="21" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/MaxMin.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="300">
+          <caret line="20" column="21" selection-start-line="20" selection-start-column="21" selection-end-line="20" selection-end-column="21" />
+          <folding>
+            <element signature="e#80#81#0" expanded="true" />
+            <element signature="e#95#96#0" expanded="true" />
+            <element signature="e#706#707#0" expanded="true" />
+            <element signature="e#732#733#0" expanded="true" />
+            <element signature="e#763#764#0" expanded="true" />
+            <element signature="e#789#790#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/Arraz.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="131">
+          <caret line="119" column="33" selection-start-line="119" selection-start-column="33" selection-end-line="119" selection-end-column="33" />
+          <folding>
+            <element signature="imports" expanded="true" />
+            <element signature="e#541#542#0" expanded="true" />
+            <element signature="e#603#604#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/ArrazTest.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="132">
+          <caret line="254" column="42" selection-start-line="254" selection-start-column="42" selection-end-line="254" selection-end-column="42" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+  </component>
+  <component name="masterDetails">
+    <states>
+      <state key="ArtifactsStructureConfigurable.UI">
+        <settings>
+          <artifact-editor />
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="FacetStructureConfigurable.UI">
+        <settings>
+          <last-edited>No facets are configured</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="GlobalLibrariesConfigurable.UI">
+        <settings>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="JdkListConfigurable.UI">
+        <settings>
+          <last-edited>1.8</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="ModuleStructureConfigurable.UI">
+        <settings>
+          <last-edited>arraz</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+                <option value="0.6" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="ProjectLibrariesConfigurable.UI">
+        <settings>
+          <last-edited>Maven: junit:junit:4.0</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+    </states>
+  </component>
+</project>

arraz/arraz.iml

@@ -1,15 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_5">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
     <output url="file://$MODULE_DIR$/target/classes" />
     <output-test url="file://$MODULE_DIR$/target/test-classes" />
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/target" />
     </content>
-    <orderEntry type="jdk" jdkName="1.8" jdkType="JavaSDK" />
+    <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" name="Maven: junit:junit:4.0" level="project" />
   </component>

arraz/pom.xml

@@ -7,6 +7,18 @@
     <groupId>rocks.zipcode.arraysgonewild</groupId>
     <artifactId>arraz</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
     <dependencies>
         <dependency>
             <groupId>junit</groupId>

arraz/src/main/java/Arraz.java

@@ -1,2 +1,126 @@
+import java.util.*;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
 public class Arraz {
+    public Integer sumValuesOfArray(Integer[] arrExample) {
+        Integer sum =0;
+        for (Integer e: arrExample ){
+            sum += e;
+        }
+        return sum;
+    }
+        // different way of doing it
+    public double sumDoubleOfArray(double[] doubleAr) {
+        double sum = 0;
+        for(int i =0; i < doubleAr.length; i++){
+            sum += doubleAr[i];
+        }
+        return sum;
+    }
+
+    public Integer averageOfArray(Integer[] intarr) {
+        return sumValuesOfArray(intarr)/ intarr.length;
+    }
+
+    public double doubleAverageOfArray(double[] arr) {
+      double value =(sumDoubleOfArray(arr)/arr.length);
+      return value;
+    }
+
+    public boolean containsValue(Integer[] arr, Integer number) {
+        for(Integer e : arr){
+            if (e.equals(number)){
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public Integer[] reverseArray(Integer[] arr) {
+        Integer[] array  = new Integer[arr.length];
+        for(int i=0; i < arr.length; i++){
+            array[i] = arr[arr.length-1-i];
+        }
+        return array;
+    }
+
+
+    public Integer[] removeDuplicates(Integer[] arr) {
+        return Stream.of(arr)
+                .distinct()
+                .toArray(Integer[]::new);
+    }
+
+    public double secondLargestDouble(Double[] arr) {
+        TreeSet<Double> set = new TreeSet(Arrays.asList(arr));
+        ArrayList<Double> list = new ArrayList(set);
+        return list.get(list.size()-2);
+    }
+
+    public Integer findIndexOfValue(Integer[] arr, Integer value) {
+        Integer saveIndex = 0;
+        for (int i = 0; i <arr.length ; i++) {
+            if (arr[i].equals(value)){
+                saveIndex = i;
+            }
+        }
+        return saveIndex;
+    }
+
+    public Integer[] copyArrayByIterator(Integer[] arr) {
+        Integer[] arr2 = new Integer[arr.length];
+        Iterator<Integer> iterator = Arrays.asList(arr).iterator();
+        int counter =0;
+        while(iterator.hasNext()){
+            arr2[counter] = iterator.next();
+            counter++;
+        }
+
+        return arr2;
+    }
+
+    public Integer[] copyArrayByLoop(Integer[] arr) {
+        Integer[] arr2 = new Integer[arr.length];
+        for (int i = 0; i <arr.length ; i++) {
+            arr2[i] = arr[i];
+        }
+        return arr2;
+    }
+
+    public String[] removeElementFromArray(String[] arr, String element) {
+        String[] arr2 = new String[arr.length-1];
+        for (int i=0; i < arr.length; i++){
+            if (!arr[i].equalsIgnoreCase(element)){
+                arr2[i] = arr[i];
+            }
+        }
+        return arr2;
+    }
+
+    public Integer[] insertIntoArayAt(Integer[] arr, Integer index, Integer numberToInsert) {
+        arr[index] = numberToInsert;
+        return arr;
+    }
+
+
+    public Integer[] makeArrayListToArray(ArrayList<Integer> al) {
+      return  al.stream()
+                .toArray(Integer[]::new);
+    }
+
+    public Integer[] evenFirstOddSecond(Integer[] arr) {
+        Integer counter =0;
+        Integer[] arr2 = new Integer[arr.length];
+        for (int i = 0; i <arr.length; i++) {
+            if (arr[i] % 2 == 0){
+                arr2[i] = arr[i];
+            }
+
+                arr2[i] = arr[i];
+
+
+        }
+        return arr2;
+    }
 }

arraz/src/main/java/MaxMin.java

@@ -0,0 +1,31 @@
+import java.util.*;
+
+public class MaxMin {
+
+    Integer[] arr;
+    Integer max=0;
+    Integer min=0;
+
+    public MaxMin(Integer[] arr) {
+    this.arr=arr;
+    }
+
+    public MaxMin(Integer max, Integer min) {
+        this.max = max;
+        this.min = min;
+    }
+
+    public void findMaxMin(Integer[] arr){
+        Arrays.sort(arr);
+        max = arr[arr.length-1];
+        min = arr[0];
+    }
+
+    public Integer getMax() {
+        return max;
+    }
+
+    public Integer getMin() {
+        return min;
+    }
+}

arraz/src/main/java/OddEven.java

@@ -0,0 +1,36 @@
+public class OddEven {
+
+    public Integer odd = 0;
+    public Integer even = 0;
+    private Integer[] arr;
+
+    public OddEven(Integer odd, Integer even) {
+        this.even = even;
+        this.odd = odd;
+    }
+
+    public OddEven(Integer[] arr) {
+        this.arr = arr;
+    }
+     public void numberOfEvenOdd(){
+        for (Integer e : arr){
+            if (e % 2 == 0){
+                even = even + 1;
+            }else{
+                odd = odd + 1;
+            }
+        }
+     }
+
+     public Integer getEvenNum(){
+        return even;
+     }
+
+     public Integer getOddNum(){
+        return odd;
+     }
+
+
+
+
+}

arraz/src/test/java/ArrazTest.java

@@ -1,5 +1,260 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
 import static org.junit.Assert.*;
 
 public class ArrazTest {
 
-}
+    Arraz az = new Arraz();
+
+    @Test
+    public void testSumValuesOfArray(){
+
+        Arraz arrayClass = new Arraz();
+        Integer[] arrExample = {5,5};
+        int expected = 10;
+        int actual = arrayClass.sumValuesOfArray(arrExample);
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void test2SumVauesOfArray(){
+
+        Arraz arrayClass = new Arraz();
+        Integer[] arrExample = {20,78,67,73,78};
+        int expected = 316;
+        int actual = arrayClass.sumValuesOfArray(arrExample);
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void testSumDoublesOfArray(){
+
+        Arraz arrayClass = new Arraz();
+        double[] doubleAr = {2.0,2.1};
+        double expected = 4.1;
+        double actual = arrayClass.sumDoubleOfArray(doubleAr);
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void test2SumOfDoublesOfArray(){
+
+        Arraz rClass = new Arraz();
+        double[] dNum = {2.0,2.1,3.4,3.1};
+        double expected = 10.6;
+        double actual = rClass.sumDoubleOfArray(dNum);
+        Assert.assertEquals(actual,expected);
+    }
+
+    @Test
+    public void testAvarageOfArray(){
+        Arraz rClass =  new Arraz();
+        Integer[] intarr = {3,6,3};
+        Integer expected = 4;
+        Integer actual = rClass.averageOfArray(intarr);
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void test2AverageOfArray(){
+        Arraz rClass =  new Arraz();
+        Integer[] intarr = {20,66,90,24};
+        Integer expected = 50;
+        Integer actual = rClass.averageOfArray(intarr);
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void testDoubleAverageOfArray(){
+        Arraz ac = new Arraz();
+        double[] arr = {2.1,2.8,1.9,9.0,5.3};
+        double expected = 21.1/5;
+        double actual = ac.doubleAverageOfArray(arr);
+        Assert.assertEquals(expected,actual);
+
+    }
+
+    @Test
+    public void test2DoubleAverageOfArray(){
+
+        Arraz ac = new Arraz();
+        double[] arr = {2.1,5.8,4.9,6.7,9.5,8.7};
+        double expected = 37.7/6;
+        double actual = ac.doubleAverageOfArray(arr);
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void testContainsValue(){
+        Integer[] arr = {1,2,4,5,3};
+        Integer number = 5;
+        boolean expected = true;
+        boolean actual = az.containsValue(arr,number);
+        Assert.assertEquals(expected,actual);
+
+    }
+
+    @Test
+    public void test2ContainsValue(){
+        Integer[] arr = {2,4,5,6,8,9};
+        Integer number = 3;
+        boolean expected = false;
+        boolean actual = az.containsValue(arr,number);
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void testReverseArray(){
+        Integer[] arr = {1,2,3,4,5};
+        Integer[] expected = {5,4,3,2,1};
+        Integer[] actual = az.reverseArray(arr);
+        Assert.assertTrue(Arrays.equals(expected,actual));
+    }
+
+    @Test
+    public void test2ReverseArray(){
+        Integer[] arr = {1,2,3,4,5,6,7};
+        Integer[] expected = {7,6,5,4,3,2,1};
+        Integer[] actual = az.reverseArray(arr);
+        Assert.assertTrue(Arrays.equals(expected,actual));
+    }
+
+    @Test
+    public void testgetOdd(){
+        Integer[] arr = {2,3,5,7,8};
+        Integer expected = 3;
+        OddEven oddEven = new OddEven(arr);
+        oddEven.numberOfEvenOdd();
+        Integer actual = oddEven.getOddNum();
+        Assert.assertEquals(expected,actual);
+
+    }
+
+    @Test
+    public void testgetEven(){
+        Integer[] arr = {2,3,5,7,8};
+        Integer expected = 2;
+        OddEven oddEven = new OddEven(arr);
+        oddEven.numberOfEvenOdd();
+        Integer actual = oddEven.getEvenNum();
+        Assert.assertEquals(actual,expected);
+    }
+
+    @Test
+    public void testRemoveDuplicates(){
+        Integer[] arr = {1,1,2,2,3,3,4,4};
+        Integer[] expected = {1,2,3,4};
+        Integer[] actual = az.removeDuplicates(arr);
+        Assert.assertTrue(Arrays.equals(expected,actual));
+    }
+    @Test
+    public void test2RemoveDuplicates(){
+        Integer[] arr = {1,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4};
+        Integer[] expected = {1,3,4};
+        Integer[] actual = az.removeDuplicates(arr);
+        Assert.assertTrue(Arrays.equals(expected,actual));
+    }
+
+    @Test
+    public void testSecondLargestDouble() {
+        Double[] arr = {1.5, 5.5, 3.2};
+        Double expected = 3.2;
+        Double actual = az.secondLargestDouble(arr);
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void test2SecondLargestDouble() {
+        Double[] arr = {1.5, 5.5, 3.2,6.7,5.8};
+        Double expected = 5.8;
+        Double actual = az.secondLargestDouble(arr);
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void testFindIndexOfValue(){
+        Integer[] arr = {1,2,3,4,5};
+        Integer value =3;
+        Integer expectedIndex = 2;
+        Integer actual = az.findIndexOfValue(arr,value);
+        Assert.assertEquals(expectedIndex,actual);
+    }
+    @Test
+    public void testFindIndexOfValue2(){
+        Integer[] arr = {1,2,3,4,5,6,7,8,9,10};
+        Integer value =8;
+        Integer expectedIndex = 7;
+        Integer actual = az.findIndexOfValue(arr,value);
+        Assert.assertEquals(expectedIndex,actual);
+    }
+    @Test
+    public void testCopyArrayByIterator(){
+        Integer[] arr = {1,2,3,4,5};
+        Integer[] expected = {1,2,3,4,5};
+        Integer[] actual = az.copyArrayByIterator(arr);
+        Assert.assertEquals(expected,actual);
+    }
+    @Test
+    public void testCopyArrayByLoop(){
+        Integer[] arr = {1,2,3,4,5};
+        Integer[] expected = {1,2,3,4,5};
+        Integer[] actual = az.copyArrayByLoop(arr);
+        Assert.assertEquals(expected,actual);
+    }
+    @Test
+    public void removeElementFromArray(){
+        String[] arr = {"hola","me", "llamo", "jose"};
+        String element = "jose";
+        String[] expected = {"hola","me","llamo"};
+        String[] actual = az.removeElementFromArray(arr,element);
+        Assert.assertEquals(expected,actual);
+    }
+    @Test
+    public void testInsertIntoArrayAt(){
+        Integer[] arr = {1,2,3,4,5};
+        Integer index = 2;
+        Integer numberToInsert = 10;
+        Integer[] expected = {1,2,10,4,5};
+        Integer[] actual = az.insertIntoArayAt(arr,index,numberToInsert);
+        Assert.assertEquals(actual,expected);
+    }
+    @Test
+    public void findMaxNumOfArray(){
+        Integer[] arr = {12,34,5,767,85,34,1,34,34,1,767};
+        MaxMin m = new MaxMin(arr);
+        Integer expected = 767;
+        m.findMaxMin(arr);
+        Integer actual = m.getMax();
+        Assert.assertEquals(expected,actual);
+    }
+    @Test
+    public void findMinNumOfArray(){
+        Integer[] arr = {12,34,5,767,85,34,1,34,34,1,767};
+        MaxMin m = new MaxMin(arr);
+        Integer expected = 1;
+        m.findMaxMin(arr);
+        Integer actual = m.getMin();
+        Assert.assertEquals(expected,actual);
+    }
+    @Test
+    public void makeArrayListArray(){
+        ArrayList<Integer> al = new ArrayList<>();
+        al.add(3);
+        al.add(4);
+        Integer[] expected = {3,4};
+        Integer[] actual = az.makeArrayListToArray(al);
+        Assert.assertEquals(expected,actual);
+    }
+    @Test
+    public void putAllEvenFirstOddAfter(){
+        Integer[] arr = {5,7,11,2,4,6};
+        Integer[] expected = {2,4,6,5,7,11};
+        Integer[] actual = az.evenFirstOddSecond(arr);
+        Assert.assertEquals(expected,actual);
+    }
+
+}