I am finished

ChapterOneMicro.iml

@@ -12,5 +12,7 @@
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
   </component>
 </module>

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

@@ -11,7 +11,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Integer add(int baseValue, int difference) {
-        return null;
+
+        return baseValue + difference;
     }
 
     /**
@@ -20,7 +21,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Long add(long baseValue, long difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
@@ -29,7 +30,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Short add(short baseValue, short difference) {
-        return null;
+
+        return (short)(baseValue + difference);
     }
 
     /**
@@ -38,7 +40,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Byte add(byte baseValue, byte difference) {
-        return null;
+        return (byte)(baseValue + difference);
     }
 
     /**
@@ -47,7 +49,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Float add(float baseValue, float difference) {
-        return null;
+
+        return baseValue + difference;
     }
 
     /**
@@ -56,7 +59,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Double add(double baseValue, double difference) {
-        return null;
+
+        return baseValue + difference;
     }
 
     /**
@@ -65,7 +69,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Integer subtract(int baseValue, int difference) {
-        return null;
+
+        return baseValue - difference;
     }
 
     /**
@@ -74,7 +79,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Long subtract(long baseValue, long difference) {
-        return null;
+
+        return baseValue - difference;
     }
 
     /**
@@ -83,7 +89,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Short subtract(short baseValue, short difference) {
-        return null;
+
+        return (short)(baseValue - difference);
     }
 
     /**
@@ -92,7 +99,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Byte subtract(byte baseValue, byte difference) {
-        return null;
+
+        return (byte)(baseValue - difference);
     }
 
     /**
@@ -101,7 +109,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Float subtract(float baseValue, float difference) {
-        return null;
+
+        return baseValue - difference;
     }
 
     /**
@@ -110,7 +119,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Double subtract(double baseValue, double difference) {
-        return null;
+
+        return baseValue - difference;
     }
 
 
@@ -120,7 +130,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Integer divide(int dividend, int divisor) {
-        return null;
+
+        return dividend / divisor;
     }
 
     /**
@@ -129,7 +140,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Long divide(long dividend, long divisor) {
-        return null;
+
+        return dividend / divisor;
     }
 
     /**
@@ -138,7 +150,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Short divide(short dividend, short divisor) {
-        return null;
+
+        return (short)(dividend / divisor);
     }
 
     /**
@@ -147,7 +160,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Byte divide(byte dividend, byte divisor) {
-        return null;
+
+        return (byte)(dividend / divisor);
     }
 
     /**
@@ -156,7 +170,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Float divide(float dividend, float divisor) {
-        return null;
+
+        return dividend / divisor;
     }
 
     /**
@@ -165,7 +180,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Double divide(double dividend, double divisor) {
-        return null;
+
+        return dividend / divisor;
     }
 
 
@@ -175,7 +191,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Integer multiply(int multiplicand, int multiplier) {
-        return null;
+
+        return multiplicand * multiplier;
     }
 
     /**
@@ -184,7 +201,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Long multiply(long multiplicand, long multiplier) {
-        return null;
+
+        return multiplicand * multiplier;
     }
 
     /**
@@ -193,7 +211,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Short multiply(short multiplicand, short multiplier) {
-        return null;
+
+        return (short)(multiplicand * multiplier);
     }
     /**
      * @param multiplicand value to be multiplied
@@ -201,7 +220,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Byte multiply(byte multiplicand, byte multiplier) {
-        return null;
+
+        return (byte)(multiplicand * multiplier);
     }
 
     /**
@@ -210,7 +230,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Float multiply(float multiplicand, float multiplier) {
-        return null;
+
+        return multiplicand * multiplier;
     }
 
     /**
@@ -219,7 +240,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Double multiply(double multiplicand, double multiplier) {
-        return null;
+
+        return multiplicand * multiplier;
     }
 
 
@@ -227,14 +249,16 @@ public class MathUtilities {
       * @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

@@ -10,16 +10,26 @@ public class PredicateUtilities {
      * @return true if `x` is greater than `y`
      */
     public Boolean isGreaterThan(int x, int y) {
-        return null;
+        if (x > y) {
+            return true;
+        }
+        else{
+            return false;
+        }
     }
-
     /**
      * @param x
      * @param y
      * @return true if `x` is less than `y`
      */
     public Boolean isLessThan(int x, int y) {
-        return null;
+        if (x < y){
+            return true;
+        }
+        else{
+            return false;
+        }
+
     }
 
     /**
@@ -28,7 +38,15 @@ public class PredicateUtilities {
      * @return true if `x` is greater than or equal to `y`
      */
     public Boolean isGreaterThanOrEqualTo(int x, int y) {
-        return null;
+        if (x >= y) {
+
+            return true;
+
+        }
+
+        else {
+            return false;
+        }
     }
 
     /**
@@ -37,6 +55,12 @@ public class PredicateUtilities {
      * @return true if `x` is less than or equal to `y`
      */
     public Boolean isLessThanOrEqualTo(int x, int y) {
-        return null;
+        if (x <= y){
+            return true;
+        }
+
+        else{
+            return false;
+        }
     }
 }

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

@@ -1,5 +1,7 @@
 package com.zipcodewilmington.danny_do_better_exercises;
 
+import com.sun.xml.internal.fastinfoset.util.CharArray;
+
 /**
  * Created by dan on 6/14/17.
  */
@@ -8,7 +10,9 @@ public class StringUtilities {
      * @return `Hello World` as a string
      */
     public static String getHelloWorld() {
-        return null;
+
+
+        return "Hello World";
     }
 
     /**
@@ -17,7 +21,8 @@ public class StringUtilities {
      * @return the concatenation of two strings, `firstSegment`, and `secondSegment`
      */
     public static String concatenation(String firstSegment, String secondSegment){
-        return null;
+
+        return firstSegment + secondSegment;
     }
 
     /**
@@ -26,7 +31,8 @@ public class StringUtilities {
      * @return the concatenation of an integer, `firstSegment`, and a String, `secondSegment`
      */
     public static String concatenation(int firstSegment, String secondSegment){
-        return null;
+
+        return firstSegment + secondSegment;
     }
 
     /**
@@ -34,7 +40,8 @@ public class StringUtilities {
      * @return the first 3 characters of `input`
      */
     public static String getPrefix(String input){
-        return null;
+
+        return input.substring(0, 3);
     }
 
     /**
@@ -42,7 +49,8 @@ public class StringUtilities {
      * @return the last 3 characters of `input`
      */
     public static String getSuffix(String input){
-        return null;
+
+        return input.substring(input.length() - 3);
     }
 
     /**
@@ -51,7 +59,8 @@ public class StringUtilities {
      * @return the equivalence of two strings, `inputValue` and `comparableValue`
      */
     public static Boolean compareTwoStrings(String inputValue, String comparableValue){
-        return null;
+
+        return false;
     }
 
     /**
@@ -59,7 +68,20 @@ public class StringUtilities {
      * @return the middle character of `inputValue`
      */
     public static Character getMiddleCharacter(String inputValue){
-        return null;
+
+        double splitWord = inputValue.length() / 2;
+        int m = (int)splitWord;
+
+        if (inputValue.length()% 2 != 0)
+        {
+            return inputValue.charAt(m);
+        }
+        else{
+
+            return inputValue.charAt(m - 1);
+
+        }
+
     }
 
     /**
@@ -67,15 +89,28 @@ public class StringUtilities {
      * @return the first sequence of characters
      */
     public static String getFirstWord(String spaceDelimitedString){
-        return null;
+
+        for (int i = 0; i < spaceDelimitedString.length(); i++)
+        {
+            if(spaceDelimitedString.charAt(i) == ' ')
+            {
+                return spaceDelimitedString.substring(0, i);
+
+            }
+
+        }return null;
     }
 
     /**
      * @param spaceDelimitedString a string delimited by spaces
      * @return the second word of a string delimited by spaces.
      */
-    public static String getSecondWord(String spaceDelimitedString){
-        return null;
+    public static String getSecondWord(String spaceDelimitedString)
+    {
+        String [ ] splitArray = spaceDelimitedString.split(" ");
+
+        return splitArray[1];
+
     }
 
     /**
@@ -83,6 +118,16 @@ public class StringUtilities {
      * @return an identical string with characters in reverse order.
      */
     public static String reverseTheTwo(String stringToReverse){
-        return null;
+
+        String reverseTheString = "";
+
+        char [] charArray = stringToReverse.toCharArray();
+
+        for (int i = charArray.length - 1; i >= 0; i--)
+        {
+            reverseTheString += charArray[i];
+
+        }
+        return reverseTheString;
     }
 }

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

@@ -5,6 +5,6 @@ package com.zipcodewilmington.danny_do_better_exercises;
  */
 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

@@ -36,7 +36,7 @@ public class TestMathUtilities {
         // : Given
         short baseValue = 16384;
         short addedValue = 7;
-        short expected = 32767;
+        short expected = 16391;
         // : When
         short actual = primativeTypes.add(baseValue, addedValue);
         // : Then
@@ -146,7 +146,7 @@ public class TestMathUtilities {
         // : When
         float actualFloat = primativeTypes.subtract(baseValue,difference);
         // : Then
-        assertEquals(expectedFloat,actualFloat, 0);
+        assertEquals(expectedFloat,actualFloat, 0.003);
     }
     @Test
     public void testSubtractions5() {
@@ -295,8 +295,8 @@ public class TestMathUtilities {
     public void testMultiplication3() {
         // : Given
         byte multiplicand = 16;
-        byte multiplier = 14;
-        byte expectedByte = 64;
+        byte multiplier = -2;
+        byte expectedByte = -32;
         // : When
         byte actualByte = primativeTypes.multiply(multiplicand, multiplier);
         // : Then
@@ -311,7 +311,7 @@ public class TestMathUtilities {
         // : When
         float actualFloat =  primativeTypes.multiply(multiplicand,multiplier);
         // : Then
-        assertEquals(expectedFloat, actualFloat, 0);
+        assertEquals(expectedFloat, actualFloat, 0.003);
     }
     @Test
     public void testMultiplication5() {

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

@@ -154,7 +154,7 @@ public class TestStringUtilities {
         String expected = "Wilmington";
 
         // : When
-        String actual = StringUtilities.getFirstWord(input);
+        String actual = StringUtilities.getSecondWord(input);
 
         // : Then
         assertEquals(expected, actual);