Merge fe52ffbc4c9374b239c7165e27feb4e71b113339 into 24118cb7b3c6ce6a0b3be331c7987add797baa81

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

@@ -5,7 +5,10 @@ import java.util.Scanner;
 /**
  * Created by leon on 1/31/18.
  */
-public class MainApp {
+public class MainApp extends TableUtilities{
     public static void main(String[] args) {
+        TableUtilities result = new TableUtilities();
+        System.out.print(result.getMultiplicationTable(20));
+
     }
 }

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

@@ -1,36 +1,66 @@
 package io.zipcoder.microlabs.mastering_loops;
 
-
 public class NumberUtilities {
     public static String getEvenNumbers(int start, int stop) {
-        return null;
-    }
+        StringBuilder numList = new StringBuilder();
+        for (int i = start; i < stop; i++) {
+            if (i % 2 == 0) {
+                numList.append(i);
+            }
+        }
 
+        return numList.toString();
+    }
 
     public static String getOddNumbers(int start, int stop) {
-        return null;
-    }
+        StringBuilder numList = new StringBuilder();
+        for (int i = start; i < stop; i++) {
+            if (i % 2 != 0) {
+                numList.append(i);
+            }
+        }
 
+        return numList.toString();
+    }
 
     public static String getSquareNumbers(int start, int stop, int step) {
-        return null;
+        StringBuilder numList = new StringBuilder();
+        for (int i = start; i < stop; i += step) {
+            int x = (int) Math.pow(i, 2);
+            numList.append(String.valueOf(x));
+        }
+
+        return numList.toString();
     }
 
-    public static String getRange(int start) {
-        return null;
+    public static String getRange(int stop) {
+        StringBuilder numList = new StringBuilder();
+        for (int i = 0; i < stop; i++)
+            numList.append(String.valueOf(i));
+        return numList.toString();
     }
 
     public static String getRange(int start, int stop) {
-        return null;
+        StringBuilder numList = new StringBuilder();
+        for (int i = start; i < stop; i++)
+            numList.append(String.valueOf(i));
+        return numList.toString();
     }
 
-
     public static String getRange(int start, int stop, int step) {
-        return null;
+        StringBuilder numList = new StringBuilder();
+        for (int i = start; i < stop; i+=step)
+            numList.append(String.valueOf(i));
+        return numList.toString();
     }
 
-
     public static String getExponentiations(int start, int stop, int step, int exponent) {
-        return null;
+        StringBuilder numList = new StringBuilder();
+        for (int i = start; i < stop; i += step) {
+            int x = (int) Math.pow(i, exponent);
+            numList.append(String.valueOf(x));
+        }
+
+        return numList.toString();
     }
-}
+}

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

@@ -1,15 +1,53 @@
 package io.zipcoder.microlabs.mastering_loops;
 
 public class TableUtilities {
-    public static String getSmallMultiplicationTable() {
-        return null;
+    /**
+     *
+     * @return a formatted multiplication table of various sizes
+     */
+
+    public String getSmallMultiplicationTable() {
+        StringBuilder smallTable = new StringBuilder();
+        for (int i = 1; i < 6; i++) {
+            StringBuilder grow = new StringBuilder();
+            for (int a = 1; a < 6; a++) {
+                int b = a * i;
+                grow.append(String.format("%3d", b)).append(" |");
+            }
+
+            smallTable.append(grow).append("\n");
+        }
+
+        return smallTable.toString();
     }
 
-    public static String getLargeMultiplicationTable() {
-        return null;
+    public String getLargeMultiplicationTable() {
+        StringBuilder bigTable = new StringBuilder();
+        for (int i = 1; i < 11; i++) {
+            StringBuilder grow = new StringBuilder();
+            for (int a = 1; a < 11; a++) {
+                int b = a * i;
+                grow.append(String.format("%3d", b)).append(" |");
+            }
+
+            bigTable.append(grow).append("\n");
+        }
+
+        return bigTable.toString();
     }
 
-    public static String getMultiplicationTable(int tableSize) {
-        return null;
+    public String getMultiplicationTable(int tableSize) {
+        StringBuilder table = new StringBuilder();
+        for (int i = 1; i < 21; i++) {
+            StringBuilder grow = new StringBuilder();
+            for (int a = 1; a < 21; a++) {
+                int b = a * i;
+                grow.append(String.format("%3d", b)).append(" |");
+            }
+
+            table.append(grow).append("\n");
+        }
+
+        return table.toString();
     }
-}
+}

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

@@ -3,18 +3,52 @@ package io.zipcoder.microlabs.mastering_loops;
 public class TriangleUtilities {
 
     public static String getTriangle(int numberOfRows) {
-        return null;
+        StringBuilder newTriangle = new StringBuilder("*\n");
+        StringBuilder newLine = new StringBuilder("*");
+        int counter = 1;
+        while (counter < numberOfRows - 1) {
+            newLine.append("*");
+            newTriangle.append(newLine).append("\n");
+            counter++;
+        }
+
+        return newTriangle.toString();
     }
 
     public static String getRow(int numberOfStars) {
-        return null;
+        StringBuilder star = new StringBuilder();
+        int counter = 1;
+        while (counter <= numberOfStars) {
+            star.append("*");
+            counter++;
+        }
+
+        return star.toString();
     }
 
     public static String getSmallTriangle() {
-        return null;
+        StringBuilder newTriangle = new StringBuilder("*\n");
+        StringBuilder newLine = new StringBuilder("*");
+        int counter = 1;
+        while (counter < 4) {
+            newLine.append("*");
+            newTriangle.append(newLine).append("\n");
+            counter++;
+        }
+
+        return newTriangle.toString();
     }
 
     public static String getLargeTriangle() {
-        return null;
+        StringBuilder newTriangle = new StringBuilder("*\n");
+        StringBuilder newLine = new StringBuilder("*");
+        int counter = 1;
+        while (counter < 9) {
+            newLine.append("*");
+            newTriangle.append(newLine).append("\n");
+            counter++;
+        }
+
+        return newTriangle.toString();
     }
 }

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

@@ -8,7 +8,7 @@ public class NumberUtilitiesTest {
     public void testGetRange1A() {
         // : Given
         String expected = "0123456789";
-        int stop = 11;
+        int stop = 10;
 
         // : When
         String actual = NumberUtilities.getRange(stop);
@@ -87,7 +87,7 @@ public class NumberUtilitiesTest {
     @Test
     public void testGetRange3B() {
         // : Given
-        String expected = "100101103104105106107108109";
+        String expected = "100101102103104105106107108109";
         int start = 100;
         int stop = 110;
 
@@ -173,7 +173,7 @@ public class NumberUtilitiesTest {
     @Test
     public void testGetEvenNumbers() {
         // : Given
-        String expected = "5791113151719";
+        String expected = "681012141618";
         int start = 5;
         int stop = 20;
 
@@ -187,7 +187,7 @@ public class NumberUtilitiesTest {
     @Test
     public void testGetOddNumbers() {
         // : Given
-        String expected = "681012141618";
+        String expected = "5791113151719";
         int start = 5;
         int stop = 20;
         int step = 5;

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

@@ -7,6 +7,8 @@ import org.junit.Test;
  * Created by leon on 1/31/18.
  */
 public class TableUtilitiesTest {
+
+    TableUtilities table = new TableUtilities();
     @Test
     public void testGetLargeMultiplicationTable() {
         String expected =
@@ -21,7 +23,7 @@ public class TableUtilitiesTest {
                 "  9 | 18 | 27 | 36 | 45 | 54 | 63 | 72 | 81 | 90 |\n" +
                 " 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 |100 |\n";
 
-        String actual = TableUtilities.getLargeMultiplicationTable();
+        String actual = table.getLargeMultiplicationTable();
         Assert.assertEquals(expected, actual);
     }
 
@@ -35,7 +37,7 @@ public class TableUtilitiesTest {
                         "  4 |  8 | 12 | 16 | 20 |\n" +
                         "  5 | 10 | 15 | 20 | 25 |\n";
 
-        String actual = TableUtilities.getSmallMultiplicationTable();
+        String actual = table.getSmallMultiplicationTable();
         Assert.assertEquals(expected, actual);
     }
 
@@ -62,7 +64,7 @@ public class TableUtilitiesTest {
                 " 18 | 36 | 54 | 72 | 90 |108 |126 |144 |162 |180 |198 |216 |234 |252 |270 |288 |306 |324 |342 |360 |\n" +
                 " 19 | 38 | 57 | 76 | 95 |114 |133 |152 |171 |190 |209 |228 |247 |266 |285 |304 |323 |342 |361 |380 |\n" +
                 " 20 | 40 | 60 | 80 |100 |120 |140 |160 |180 |200 |220 |240 |260 |280 |300 |320 |340 |360 |380 |400 |\n";
-        String actual = TableUtilities.getMultiplicationTable(20);
+        String actual = table.getMultiplicationTable(20);
         Assert.assertEquals(expected, actual);
     }