all done

src/main/java/io/zipcoder/microlabs/mastering_loops/NumberUtilities.java

@@ -3,26 +3,56 @@
 
 public class NumberUtilities {
  public static String getEvenNumbers(int start, int stop) {
- return null;
+ return getRange(start + (start % 2), stop, 2);
  }
 
+/* //Kris wrote this, look at it later
+ public static String getEvenNumbersk(int start, int stop) { //
+ for ({String s = ""; int i=start;}; i < stop;i++) s = s + ((i % 2 == 0) ? i : "");
+ return s;
+ }
+*/
 
  public static String getOddNumbers(int start, int stop) {
- return null;
+ return getRange((start % 2 != 0) ? start : start+1, stop, 2);
  }
 
-
  public static String getSquareNumbers(int start, int stop, int step) {
- return null;
+ return getExponentiations(start, stop, step, 2);
+ }
+
+ public static String getPerfectSquares(int start, int stop) {
+ StringBuilder sb = new StringBuilder();
+ for (int i=start;i<stop;i++) {
+ if (Math.round(Math.sqrt(i)) == Math.sqrt(i)) { //if the number is the same after round() its a perfect square
+ sb.append(i);
+ }
+ }
+ return sb.toString();
  }
 
+ public static String getRange(int stop) {
+ return getRange(0, stop, 1);
+ }
+
+ public static String getRange(int start, int stop) {
+ return getRange(start, stop, 1);
+ }
 
  public static String getRange(int start, int stop, int step) {
- return null;
+ StringBuilder sb = new StringBuilder();
+ for (int i=start;i<stop;i+=step) {
+ sb.append(i);
+ }
+ return sb.toString();
  }
 
 
  public static String getExponentiations(int start, int stop, int step, int exponent) {
- return null;
+ StringBuilder sb = new StringBuilder();
+ for (int i = start;i<stop;i+=step) {
+ sb.append((int)Math.pow(i, exponent));
+ }
+ return sb.toString();
  }
 }

src/main/java/io/zipcoder/microlabs/mastering_loops/TableUtilities.java

@@ -2,14 +2,21 @@
 
 public class TableUtilities {
  public static String getSmallMultiplicationTable() {
- return null;
+ return getMultiplicationTable(5);
  }
 
  public static String getLargeMultiplicationTable() {
- return null;
+ return getMultiplicationTable(10);
  }
 
  public static String getMultiplicationTable(int tableSize) {
- return null;
+ StringBuilder sb = new StringBuilder();
+ for (int i = 1; i <= tableSize; i++) {
+ for (int j = 1; j <= tableSize; j++) {
+ sb.append(String.format("%1$3s |", (i * j)));
+ }
+ sb.append("\n");
+ }
+ return sb.toString();
  }
 }

src/main/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilities.java

@@ -3,18 +3,27 @@
 public class TriangleUtilities {
 
  public static String getTriangle(int numberOfRows) {
- return null;
+ StringBuilder sb = new StringBuilder();
+ for (int i=1;i<=numberOfRows;i++) {
+ sb.append(getRow((i)));
+ sb.append("\n");
+ }
+ return sb.toString();
  }
 
  public static String getRow(int numberOfStars) {
- return null;
+ StringBuilder sb = new StringBuilder();
+ for (int i=0;i<numberOfStars;i++) {
+ sb.append("*");
+ }
+ return sb.toString();
  }
 
  public static String getSmallTriangle() {
- return null;
+ return getTriangle(4);
  }
 
  public static String getLargeTriangle() {
- return null;
+ return getTriangle(10);
  }
 }

src/test/java/io/zipcoder/microlabs/mastering_loops/NumberUtilitiesTest.java

@@ -49,29 +49,28 @@ public void testGetRange2() {
 
 
  @Test
- public void testGetEvenNumbers() {
+ public void testGetOddNumbers() {
  // : Given
  String expected = "5791113151719";
  int start = 5;
  int stop = 20;
 
  // : When
- String actual = NumberUtilities.getEvenNumbers(start, stop);
+ String actual = NumberUtilities.getOddNumbers(start, stop);
 
  // : Then
  Assert.assertEquals(expected, actual);
  }
 
  @Test
- public void testGetOddNumbers() {
+ public void testGetEvenNumbers() {
  // : Given
  String expected = "681012141618";
  int start = 5;
  int stop = 20;
- int step = 5;
 
  // : When
- String actual = NumberUtilities.getOddNumbers(start, stop);
+ String actual = NumberUtilities.getEvenNumbers(start, stop);
 
  // : Then
  Assert.assertEquals(expected, actual);
@@ -94,6 +93,17 @@ public void testGetSquareNumbers() {
  Assert.assertEquals(expected, actual);
  }
 
+ @Test
+ public void testGetPerfectSquares() {
+ // : Given
+ String expected = "14916253649";
+ int start = 1;
+ int stop = 50;
+
+ // : When
+ String actual = NumberUtilities.getPerfectSquares(start, stop);
+ }
+
 
  @Test
  public void testGetExponentiationNumbers() {
@@ -109,4 +119,29 @@ public void testGetExponentiationNumbers() {
 
  Assert.assertEquals(expected, actual);
  }
+
+ @Test
+ public void testGetRangeWithOneParam() {
+ // : Given
+ String expected = "0123456789101112131415161718";
+ int stop = 19;
+
+ // : When
+ String actual = NumberUtilities.getRange(stop);
+
+ Assert.assertEquals(expected, actual);
+ }
+
+ @Test
+ public void testGetRangeWithTwoParams() {
+ // : Given
+ String expected = "5678910";
+ int start = 5;
+ int stop = 11;
+
+ // : When
+ String actual = NumberUtilities.getRange(start, stop);
+
+ Assert.assertEquals(expected, actual);
+ }
 }

src/test/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilitiesTest.java

@@ -27,7 +27,7 @@ public void getTriangleTest1() {
  "*******\n" +
  "********\n" +
  "*********\n";
- String actual = TriangleUtilities.getTriangle(10);
+ String actual = TriangleUtilities.getTriangle(9); //input 9, get a 9 x 9, actually expect a 9x9
  Assert.assertEquals(expected, actual);
  }
 
@@ -38,7 +38,7 @@ public void getTriangleTest2() {
  "**\n" +
  "***\n" +
  "****\n";
- String actual = TriangleUtilities.getTriangle(5);
+ String actual = TriangleUtilities.getTriangle(4); // see above..
  Assert.assertEquals(expected, actual);
  }
 
@@ -53,7 +53,8 @@ public void testGetLargeTriangle() {
  "******\n" +
  "*******\n" +
  "********\n" +
- "*********\n";
+ "*********\n" +
+ "**********\n";
  String actual = TriangleUtilities.getLargeTriangle();
  Assert.assertEquals(expected, actual);
  }