Cleaning code

PredicateUtilities.java

@@ -1,57 +1,57 @@
- 
+
 
 /**
- * Created by dan on 6/14/17.
- */
+* Created by dan on 6/14/17.
+*/
 public class PredicateUtilities {
-    /**
-     * @param x
-     * @param y
-     * @return true if `x` is greater than `y`
-     */
-    public Boolean isGreaterThan(int x, int y) {
-        return null;
-    }
+   /**
+    * @param x
+    * @param y
+    * @return true if `x` is greater than `y`
+    */
+   public Boolean isGreaterThan(int x, int y) {
+       return x > y;
+   }
 
-    /**
-     * @param x
-     * @param y
-     * @return true if `x` is less than `y`
-     */
-    public Boolean isLessThan(int x, int y) {
-        return null;
-    }
+   /**
+    * @param x
+    * @param y
+    * @return true if `x` is less than `y`
+    */
+   public Boolean isLessThan(int x, int y) {
+       return x < y;
+   }
 
-    /**
-     * @param x
-     * @param y
-     * @return true if `x` is greater than or equal to `y`
-     */
-    public Boolean isGreaterThanOrEqualTo(int x, int y) {
-        return null;
-    }
+   /**
+    * @param x
+    * @param y
+    * @return true if `x` is greater than or equal to `y`
+    */
+   public Boolean isGreaterThanOrEqualTo(int x, int y) {
+       return x >= y;
+   }
 
-    /**
-     * @param x
-     * @param y
-     * @return true if `x` is less than or equal to `y`
-     */
-    public Boolean isLessThanOrEqualTo(int x, int y) {
-        return null;
-    }
-    
-    
-       /**
-      * @return true
-     */
-    public Boolean returnTrue() {
-        return null;
-    }
+   /**
+    * @param x
+    * @param y
+    * @return true if `x` is less than or equal to `y`
+    */
+   public Boolean isLessThanOrEqualTo(int x, int y) {
+       return x <= y;
+   }
+
+
+      /**
+     * @return true
+    */
+   public Boolean returnTrue() {
+       return true;
+   }
 
-    /**
-     * @return false
-     */
-    public Boolean returnFalse() {
-        return null;
-    }
+   /**
+    * @return false
+    */
+   public Boolean returnFalse() {
+       return false;
+   }
 }

StringUtilities.java

@@ -1,88 +1,99 @@
- 
+
 
 /**
- * Created by dan on 6/14/17.
- */
+* Created by dan on 6/14/17.
+*/
 public class StringUtilities {
-    /**
-     * @return `Hello World` as a string
-     */
-    public static String getHelloWorld() {
-        return null;
-    }
+   /**
+    * @return `Hello World` as a string
+    */
+   public static String getHelloWorld() {
+       return "Hello World";
+   }
 
-    /**
-     * @param firstSegment a string to be added to
-     * @param secondSegment a string to add
-     * @return the concatenation of two strings, `firstSegment`, and `secondSegment`
-     */
-    public static String concatenation(String firstSegment, String secondSegment){
-        return null;
-    }
+   /**
+    * @param firstSegment a string to be added to
+    * @param secondSegment a string to add
+    * @return the concatenation of two strings, `firstSegment`, and `secondSegment`
+    */
+   public static String concatenation(String firstSegment, String secondSegment){
+       return firstSegment + secondSegment;
+   }
 
-    /**
-     * @param firstSegment a string to be added to
-     * @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;
-    }
+   /**
+    * @param firstSegment a string to be added to
+    * @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 Integer.toString(firstSegment) + secondSegment;
+   }
 
-    /**
-     * @param input a string to be manipulated
-     * @return the first 3 characters of `input`
-     */
-    public static String getPrefix(String input){
-        return null;
-    }
+   /**
+    * @param input a string to be manipulated
+    * @return the first 3 characters of `input`
+    */
+   public static String getPrefix(String input){
+       return input.substring(0,3);
+   }
 
-    /**
-     * @param input a string to be manipulated
-     * @return the last 3 characters of `input`
-     */
-    public static String getSuffix(String input){
-        return null;
-    }
+   /**
+    * @param input a string to be manipulated
+    * @return the last 3 characters of `input`
+    */
+   public static String getSuffix(String input){
+       return input.substring(input.length() - 3);
+   }
 
-    /**
-     * @param inputValue the value to be compared
-     * @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;
-    }
+   /**
+    * @param inputValue the value to be compared
+    * @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 inputValue.equals(comparableValue);
+   }
 
-    /**
-     * @param inputValue the value input from user
-     * @return the middle character of `inputValue`
-     */
-    public static Character getMiddleCharacter(String inputValue){
-        return null;
-    }
+   /**
+    * @param inputValue the value input from user
+    * @return the middle character of `inputValue`
+    */
+
+   public static Character getMiddleCharacter(String inputValue){
+       int lengthString = inputValue.length();
+       int halfString = lengthString / 2;
+       int option = (halfString % 2 == 0) ? 1 : 0;
+       char middleChar = inputValue.charAt(halfString - option);
+       return middleChar;
+   }
 
-    /**
-     * @param spaceDelimitedString a string, representative of a sentence, containing spaces
-     * @return the first sequence of characters
-     */
-    public static String getFirstWord(String spaceDelimitedString){
-        return null;
-    }
+   /**
+    * @param spaceDelimitedString a string, representative of a sentence, containing spaces
+    * @return the first sequence of characters
+    */
+   public static String getFirstWord(String spaceDelimitedString){
+       return spaceDelimitedString.split(" ")[0];
+   }
 
-    /**
-     * @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;
-    }
+   /**
+    * @param spaceDelimitedString a string delimited by spaces
+    * @return the second word of a string delimited by spaces.
+    */
+   public static String getSecondWord(String spaceDelimitedString){
+       return spaceDelimitedString.split(" ")[1];
+   }
 
-    /**
-     * @param stringToReverse
-     * @return an identical string with characters in reverse order.
-     */
-    public static String reverse(String stringToReverse){
-        return null;
-    }
+   /**
+    * @param stringToReverse
+    * @return an identical string with characters in reverse order.
+    */
+   public static String reverse(String stringToReverse){
+       int lengthString = stringToReverse.length();
+       String[] splitWord = stringToReverse.split("");
+       String reverseWord = "";
+       for(int i = lengthString - 1; i >= 0; i--){
+           reverseWord += splitWord[i];
+       }
+       return reverseWord;
+   }
 }

TestMultiplication.java

@@ -47,7 +47,7 @@ public void testShortMultiplication() {
     public void testByteMultiplication() {
         // : Given
         byte multiplicand = 16;
-        byte multiplier = 14;
+        byte multiplier = 4;
         byte expectedByte = 64;
         // : When
         byte actualByte = mathUtils.multiply(multiplicand, multiplier);

_config.yml

@@ -0,0 +1 @@
+theme: jekyll-theme-midnight