last update

.idea/compiler.xml

         <module name="ChapterOneMicro" />
       </profile>
     </annotationProcessing>
-    <bytecodeTargetLevel target="1.8">
+    <bytecodeTargetLevel>
       <module name="ChapterOneMicro" target="1.8" />
     </bytecodeTargetLevel>
   </component>

.idea/kotlinc.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="KotlinCommonCompilerArguments">
-    <option name="languageVersion" value="1.1" />
-    <option name="apiVersion" value="1.1" />
-  </component>
-</project>

.idea/misc.xml

       </list>
     </option>
   </component>
-  <component name="ProjectInspectionProfilesVisibleTreeState">
-    <entry key="Project Default">
-      <profile-state>
-        <expanded-state>
-          <State>
-            <id />
-          </State>
-        </expanded-state>
-        <selected-state>
-          <State>
-            <id>Android</id>
-          </State>
-        </selected-state>
-      </profile-state>
-    </entry>
-  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
-    <output url="file://$PROJECT_DIR$/classes" />
-  </component>
-  <component name="masterDetails">
-    <states>
-      <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="ProjectJDKs.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="ProjectLibrariesConfigurable.UI">
-        <settings>
-          <splitter-proportions>
-            <option name="proportions">
-              <list>
-                <option value="0.2" />
-              </list>
-            </option>
-          </splitter-proportions>
-        </settings>
-      </state>
-      <state key="ScopeChooserConfigurable.UI">
-        <settings>
-          <splitter-proportions>
-            <option name="proportions">
-              <list>
-                <option value="0.2" />
-              </list>
-            </option>
-          </splitter-proportions>
-        </settings>
-      </state>
-    </states>
+    <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

src/main/java/com/zipcodewilmington/danny_do_better_exercises/MathUtilities.java

      * @return sum of `baseValue` and `difference`
      */
     public Integer add(int baseValue, int difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
      * @return sum of `baseValue` and `difference`
      */
     public Long add(long baseValue, long difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
      * @return sum of `baseValue` and `difference`
      */
     public Short add(short baseValue, short difference) {
-        return null;
+        // why do we need to cast to a short?
+        short sum = (short)(baseValue + difference);
+        return sum;
     }
 
     /**
      * @return sum of `baseValue` and `difference`
      */
     public Byte add(byte baseValue, byte difference) {
-        return null;
+        byte sum = (byte) (baseValue + difference);
+        return sum;
     }
 
     /**
      * @return sum of `baseValue` and `difference`
      */
     public Float add(float baseValue, float difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
      * @return sum of `baseValue` and `difference`
      */
     public Double add(double baseValue, double difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
      * @return difference between `baseValue` and `difference`
      */
     public Integer subtract(int baseValue, int difference) {
-        return null;
+        return baseValue - difference;
     }
 
     /**
      * @return difference between `baseValue` and `difference`
      */
     public Long subtract(long baseValue, long difference) {
-        return null;
+        return baseValue - difference;
     }
 
     /**
      * @return difference between `baseValue` and `difference`
      */
     public Short subtract(short baseValue, short difference) {
-        return null;
+        short diff = (short)(baseValue - difference);
+        return diff;
     }
 
     /**
      * @return difference between `baseValue` and `difference`
      */
     public Byte subtract(byte baseValue, byte difference) {
-        return null;
+
+        byte diff = (byte)(baseValue - difference);
+
+        return diff;
     }
 
     /**
      * @return difference between `baseValue` and `difference`
      */
     public Float subtract(float baseValue, float difference) {
-        return null;
+        return baseValue - difference;
     }
 
     /**
      * @return difference between `baseValue` and `difference`
      */
     public Double subtract(double baseValue, double difference) {
-        return null;
+        return baseValue - difference;
     }
 
 
      * @return division of `dividend` by `divisor
      */
     public Integer divide(int dividend, int divisor) {
-        return null;
+        return dividend / divisor;
     }
 
     /**
      * @return division of `dividend` by `divisor
      */
     public Long divide(long dividend, long divisor) {
-        return null;
+        return dividend / divisor;
     }
 
     /**
      * @return division of `dividend` by `divisor
      */
     public Short divide(short dividend, short divisor) {
-        return null;
+       short div = (short) (dividend / divisor);
+        return div;
     }
 
     /**
      * @return division of `dividend` by `divisor
      */
     public Byte divide(byte dividend, byte divisor) {
-        return null;
+        byte div = (byte) (dividend / divisor);
+        return div;
     }
 
     /**
      * @return division of `dividend` by `divisor
      */
     public Float divide(float dividend, float divisor) {
-        return null;
+        return dividend / divisor;
     }
 
     /**
      * @return division of `dividend` by `divisor
      */
     public Double divide(double dividend, double divisor) {
-        return null;
+        return  dividend / divisor;
     }
 
 
      * @return product of `multiplicand` by `multiplier`
      */
     public Integer multiply(int multiplicand, int multiplier) {
-        return null;
+        return multiplicand * multiplier;
     }
 
     /**
      * @return product of `multiplicand` by `multiplier`
      */
     public Long multiply(long multiplicand, long multiplier) {
-        return null;
+        return multiplicand * multiplier;
     }
 
     /**
      * @return product of `multiplicand` by `multiplier`
      */
     public Short multiply(short multiplicand, short multiplier) {
-        return null;
+       short product = (short) (multiplicand * multiplier);
+        return product;
     }
     /**
      * @param multiplicand value to be multiplied
      * @return product of `multiplicand` by `multiplier`
      */
     public Byte multiply(byte multiplicand, byte multiplier) {
+        byte product = (byte) (multiplicand * multiplier);
+
         return null;
     }
 
      * @return product of `multiplicand` by `multiplier`
      */
     public Float multiply(float multiplicand, float multiplier) {
-        return null;
+        return multiplicand * multiplier;
     }
 
     /**
      * @return product of `multiplicand` by `multiplier`
      */
     public Double multiply(double multiplicand, double multiplier) {
-        return null;
+        return  multiplicand * multiplier;
     }
 
 
       * @return true
      */
     public Boolean returnTrue() {
-        return null;
+        return true;
     }
 
     /**
      * @return false
      */
     public Boolean returnFalse() {
-        return null;
+        return false;
     }
 
 }

src/main/java/com/zipcodewilmington/danny_do_better_exercises/PredicateUtilities.java

      * @return true if `x` is greater than `y`
      */
     public Boolean isGreaterThan(int x, int y) {
-        return null;
+        boolean great = false;
+        if (x > y) {
+            great = true;
+        }
+
+        return great;
     }
 
     /**
      * @return true if `x` is less than `y`
      */
     public Boolean isLessThan(int x, int y) {
-        return null;
+        boolean good = false;
+        if (x < y) {
+            good = true;
+        }
+        return good;
     }
 
     /**
      * @return true if `x` is greater than or equal to `y`
      */
     public Boolean isGreaterThanOrEqualTo(int x, int y) {
-        return null;
+        boolean great = false;
+        if (x >= y) {
+            great = true;
+        }
+        return great;
     }
 
     /**
      * @return true if `x` is less than or equal to `y`
      */
     public Boolean isLessThanOrEqualTo(int x, int y) {
-        return null;
+
+        boolean great = false;
+        if (x <= y) {
+            great = true;
+        }
+        return great;
     }
 }

src/main/java/com/zipcodewilmington/danny_do_better_exercises/StringUtilities.java

      * @return `Hello World` as a string
      */
     public static String getHelloWorld() {
-        return null;
+        String hello = "Hello World";
+        return hello;
     }
 
     /**
      * @return the concatenation of two strings, `firstSegment`, and `secondSegment`
      */
     public static String concatenation(String firstSegment, String secondSegment){
-        return null;
+
+        return firstSegment + secondSegment;
     }
 
     /**
      * @param secondSegment a string to add
      * @return the concatenation of an integer, `firstSegment`, and a String, `secondSegment`
      */
-    public static String concatenation(int firstSegment, String secondSegment){
-        return null;
+    public static String concatenation(int firstSegment, String secondSegment) {
+//    String firstString = Integer.toString(firstSegment);
+       // firstSegment = "a string to be added to";
+
+
+        return String.valueOf(firstSegment) + secondSegment;
     }
 
     /**
      * @return the first 3 characters of `input`
      */
     public static String getPrefix(String input){
-        return null;
+
+
+        return input.substring(0,3);
     }
 
     /**
      * @return the last 3 characters of `input`
      */
     public static String getSuffix(String input){
-        return null;
+        String shortString = input.substring(input.length() -3);
+        return shortString;
     }
 
     /**
      * @param comparableValue the value to be compared against
      * @return the equivalence of two strings, `inputValue` and `comparableValue`
      */
-    public static Boolean compareTwoStrings(String inputValue, String comparableValue){
-        return null;
-    }
+    public static Boolean compareTwoStrings(String inputValue, String comparableValue) {
 
-    /**
+
+        return inputValue.equals(comparableValue);
+
+
+    }
+        /**
      * @param inputValue the value input from user
      * @return the middle character of `inputValue`
      */
-    public static Character getMiddleCharacter(String inputValue){
-        return null;
-    }
+    public static Character getMiddleCharacter(String inputValue) {
+
+
+        //return  middleString = inputValue.charAt(inputValue.length()/2);
+ // even length string
+        //if (inputValue.length() % 2 == 0) {
+            char middleString = inputValue.charAt(inputValue.length() / 2);
 
+           // return middleString;
+        //} else
+            return middleString;
+    }
     /**
      * @param spaceDelimitedString a string, representative of a sentence, containing spaces
      * @return the first sequence of characters
      */
     public static String getFirstWord(String spaceDelimitedString){
-        return null;
+       // String [] firstWord;
+        //
+       // how can I get rid of regex or why would I use regex?
+        // firstWord = spaceDelimitedString.split("");
+
+       // return firstWord[0];
+        return spaceDelimitedString.substring(0,spaceDelimitedString.indexOf(""));
     }
 
     /**
      * @return the second word of a string delimited by spaces.
      */
     public static String getSecondWord(String spaceDelimitedString){
-        return null;
+
+        return spaceDelimitedString.substring(spaceDelimitedString.indexOf(""),spaceDelimitedString.length());
     }
 
     /**
      * @return an identical string with characters in reverse order.
      */
     public static String reverseTheTwo(String stringToReverse){
-        return null;
+         StringBuilder reverseString = new StringBuilder();
+        reverseString.append(stringToReverse);
+        reverseString = reverseString.reverse();
+       return reverseString.toString();
+
     }
 }

src/main/java/com/zipcodewilmington/danny_do_better_exercises/ZipcodeRocks.java

  */
 public class ZipcodeRocks {
     public static void main(String[] args) {
-//         System.out.println("Zipcode Rocks!");
+       System.out.println("Zipcode Rocks!");
     }
 }

src/test/java/com/zipcodewilmington/danny_do_better_exercises/TestMathUtilities.java

         // : Given
         short baseValue = 16384;
         short addedValue = 7;
-        short expected = 32767;
+        short expected = 16391;
         // : When
         short actual = primativeTypes.add(baseValue, addedValue);
         // : Then

src/test/java/com/zipcodewilmington/danny_do_better_exercises/TestStringUtilities.java

     public void substringBeginTest(){
         // : Given
         String input = "Hello";
-        String expected = "olleH";
+        String expected = "Hel";
 
         // : When
         String actual = StringUtilities.getPrefix(input);
         Character actual = StringUtilities.getMiddleCharacter(input);
 
         // : Then
-        Assert.assertEquals(expected.toString(), actual.toString());
+        Assert.assertEquals(expected, actual);
     }