Merge a5c2793b98ad746ba1564a5bdd140ecba7af1341 into 036bfcdb21ddafb11d4b850f4a344597fa1e729e

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

@@ -3,6 +3,7 @@ package com.zipcodewilmington.danny_do_better_exercises;
 /**
  * Created by dan on 6/14/17.
  */
+
 public class MathUtilities {
 
     /**
@@ -10,8 +11,9 @@ public class MathUtilities {
      * @param difference value to add to starting value
      * @return sum of `baseValue` and `difference`
      */
+
     public Integer add(int baseValue, int difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
@@ -20,7 +22,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Long add(long baseValue, long difference) {
-        return null;
+        return (long)(baseValue + difference);
     }
 
     /**
@@ -29,7 +31,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Short add(short baseValue, short difference) {
-        return null;
+
+        return (short)(baseValue + difference);
     }
 
     /**
@@ -38,7 +41,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Byte add(byte baseValue, byte difference) {
-        return null;
+
+        return (byte)(baseValue + difference);
     }
 
     /**
@@ -47,7 +51,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Float add(float baseValue, float difference) {
-        return null;
+
+        return (float)(baseValue + difference);
     }
 
     /**
@@ -56,7 +61,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Double add(double baseValue, double difference) {
-        return null;
+
+        return (double)(baseValue + difference);
     }
 
     /**
@@ -65,7 +71,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Integer subtract(int baseValue, int difference) {
-        return null;
+
+        return baseValue - difference;
     }
 
     /**
@@ -74,7 +81,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Long subtract(long baseValue, long difference) {
-        return null;
+
+        return baseValue - difference;
     }
 
     /**
@@ -83,7 +91,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Short subtract(short baseValue, short difference) {
-        return null;
+
+        return (short)(baseValue - difference);
     }
 
     /**
@@ -92,7 +101,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Byte subtract(byte baseValue, byte difference) {
-        return null;
+
+        return (byte)(baseValue - difference);
     }
 
     /**
@@ -101,7 +111,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Float subtract(float baseValue, float difference) {
-        return null;
+
+        return (float)(baseValue - difference);
     }
 
     /**
@@ -110,7 +121,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Double subtract(double baseValue, double difference) {
-        return null;
+
+        return (double)(baseValue - difference);
     }
 
 
@@ -120,7 +132,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Integer divide(int dividend, int divisor) {
-        return null;
+
+        return dividend / divisor;
     }
 
     /**
@@ -129,7 +142,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Long divide(long dividend, long divisor) {
-        return null;
+
+        return dividend / divisor;
     }
 
     /**
@@ -138,7 +152,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Short divide(short dividend, short divisor) {
-        return null;
+
+        return (short)(dividend / divisor);
     }
 
     /**
@@ -147,7 +162,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Byte divide(byte dividend, byte divisor) {
-        return null;
+
+        return (byte)(dividend / divisor);
     }
 
     /**
@@ -156,7 +172,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Float divide(float dividend, float divisor) {
-        return null;
+
+        return (float)(dividend / divisor);
     }
 
     /**
@@ -165,7 +182,8 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Double divide(double dividend, double divisor) {
-        return null;
+
+        return (double)(dividend / divisor);
     }
 
 
@@ -175,7 +193,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Integer multiply(int multiplicand, int multiplier) {
-        return null;
+
+        return multiplicand * multiplier;
     }
 
     /**
@@ -184,7 +203,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Long multiply(long multiplicand, long multiplier) {
-        return null;
+
+        return multiplicand * multiplier;
     }
 
     /**
@@ -193,7 +213,8 @@ 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 +222,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Byte multiply(byte multiplicand, byte multiplier) {
-        return null;
+
+        return (byte)(multiplicand * multiplier);
     }
 
     /**
@@ -210,7 +232,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Float multiply(float multiplicand, float multiplier) {
-        return null;
+
+        return multiplicand * multiplier;
     }
 
     /**
@@ -219,7 +242,8 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Double multiply(double multiplicand, double multiplier) {
-        return null;
+
+        return multiplicand * multiplier;
     }
 
 
@@ -227,14 +251,16 @@ 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

@@ -10,7 +10,8 @@ public class PredicateUtilities {
      * @return true if `x` is greater than `y`
      */
     public Boolean isGreaterThan(int x, int y) {
-        return null;
+
+        return (x > y);
     }
 
     /**
@@ -19,7 +20,8 @@ public class PredicateUtilities {
      * @return true if `x` is less than `y`
      */
     public Boolean isLessThan(int x, int y) {
-        return null;
+
+        return (x < y);
     }
 
     /**
@@ -28,7 +30,8 @@ public class PredicateUtilities {
      * @return true if `x` is greater than or equal to `y`
      */
     public Boolean isGreaterThanOrEqualTo(int x, int y) {
-        return null;
+
+        return (x >= y);
     }
 
     /**
@@ -37,6 +40,7 @@ public class PredicateUtilities {
      * @return true if `x` is less than or equal to `y`
      */
     public Boolean isLessThanOrEqualTo(int x, int y) {
-        return null;
+
+        return (x <= y);
     }
 }

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

@@ -8,7 +8,9 @@ public class StringUtilities {
      * @return `Hello World` as a string
      */
     public static String getHelloWorld() {
-        return null;
+
+        String greeting = "Hello World";
+        return greeting;
     }
 
     /**
@@ -17,7 +19,8 @@ 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 +29,8 @@ 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 +38,8 @@ 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 +47,8 @@ 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 +57,8 @@ public class StringUtilities {
      * @return the equivalence of two strings, `inputValue` and `comparableValue`
      */
     public static Boolean compareTwoStrings(String inputValue, String comparableValue){
-        return null;
+
+        return inputValue.equals(comparableValue);
     }
 
     /**
@@ -59,7 +66,10 @@ public class StringUtilities {
      * @return the middle character of `inputValue`
      */
     public static Character getMiddleCharacter(String inputValue){
-        return null;
+        int str = inputValue.length();
+
+        return inputValue.charAt(Math.round(str / 2));
+
     }
 
     /**
@@ -67,7 +77,8 @@ public class StringUtilities {
      * @return the first sequence of characters
      */
     public static String getFirstWord(String spaceDelimitedString){
-        return null;
+        int spacer = spaceDelimitedString.indexOf(" ");
+        return spaceDelimitedString.substring(0, spacer);
     }
 
     /**
@@ -75,14 +86,22 @@ public class StringUtilities {
      * @return the second word of a string delimited by spaces.
      */
     public static String getSecondWord(String spaceDelimitedString){
-        return null;
+        int spacer = spaceDelimitedString.indexOf(" ");
+        return spaceDelimitedString.substring(spacer + 1, spaceDelimitedString.length());
     }
 
     /**
      * @param stringToReverse
      * @return an identical string with characters in reverse order.
      */
-    public static String reverse(String stringToReverse){
-        return null;
+
+    public static String reverse(String stringToReverse) {
+        String reverse = "";
+        for (int i = stringToReverse.length() - 1; i >= 0; i--) {
+            reverse += stringToReverse.charAt(i);
+        }
+        return reverse;
     }
+
+
 }

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!");
     }
 }