Add ArrayLists and while loops assignments (#4)

app/src/main/java/assignments/lists1/FilterList.java

@@ -0,0 +1,42 @@
+package assignments.lists1;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class FilterList {
+    // Create a function that accepts two lists of strings.
+    // Modify the first list so that it only contains strings that are also in the second list.
+    // You probably want to use List#contains() for this.
+    // Don't return anything.
+
+    // vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv YOUR CODE vvvvvvvvvvvvvvvvvvvvvvvvvvvvv
+
+    private static void filterList(ArrayList<String> input, ArrayList<String> filter) {}
+
+    // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ YOUR CODE ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+    private static void testFilterList(
+            List<String> input, List<String> filter, List<String> expected) {
+        System.out.println("");
+        ArrayList<String> result = new ArrayList<>(input);
+        filterList(result, new ArrayList<>(filter));
+        boolean pass = result.equals(expected);
+        __testResults +=
+                String.format(
+                        "filterList(%s, %s) -> %s | %s | %s \n",
+                        input, filter, expected, result, pass ? "OK " : "X ");
+    }
+
+    private static String __testResults = "";
+
+    public static void main(String[] args) {
+        testFilterList(List.of("a", "b", "c"), List.of("a", "b", "c"), List.of("a", "b", "c"));
+        testFilterList(List.of("a", "b", "c"), List.of("a", "b", "d"), List.of("a", "b"));
+        testFilterList(List.of("a", "b", "c"), List.of("d", "e", "f"), List.of());
+        testFilterList(List.of("a", "b", "c"), List.of(), List.of());
+        testFilterList(List.of(), List.of("a", "b", "c"), List.of());
+        testFilterList(List.of(), List.of(), List.of());
+        System.out.println("Function Call -> Expected | Yours | Pass?\n");
+        System.out.println(__testResults);
+    }
+}

app/src/main/java/assignments/lists1/MultiplyUntil.java

@@ -0,0 +1,35 @@
+package assignments.lists1;
+
+public class MultiplyUntil {
+    // Create a function that accepts an int and multiplies it by 3.
+    // Store that number, and keep multiplying by 3 until the number is greater than 100.
+    // Count the number of times you multiplied, and return that number.
+
+    // vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv YOUR CODE vvvvvvvvvvvvvvvvvvvvvvvvvvvvv
+
+    private static int multiplyUntil(int value) {
+        return 0;
+    }
+
+    // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ YOUR CODE ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+    private static void testMultiplyUntil(int input, int expected) {
+        System.out.println("");
+        int result = multiplyUntil(input);
+        boolean pass = result == expected;
+        __testResults +=
+                String.format(
+                        "multiplyUntil(%d) -> %d | %d | %s \n", input, expected, result, pass ? "OK " : "X ");
+    }
+
+    private static String __testResults = "";
+
+    public static void main(String[] args) {
+        testMultiplyUntil(1, 5);
+        testMultiplyUntil(2, 4);
+        testMultiplyUntil(40, 1);
+        testMultiplyUntil(200, 0);
+        System.out.println("Function Call -> Expected | Yours | Pass?\n");
+        System.out.println(__testResults);
+    }
+}

app/src/main/java/assignments/lists1/SplitString.java

@@ -0,0 +1,36 @@
+package assignments.lists1;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class SplitString {
+    // Create a function that accepts a string, splits it into each character, and then returns a list
+    // of the characters
+
+    // vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv YOUR CODE vvvvvvvvvvvvvvvvvvvvvvvvvvvvv
+
+    private static ArrayList<String> splitString(String input) {
+        return new ArrayList<String>();
+    }
+
+    // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ YOUR CODE ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+    private static void testSplitString(String input, List<String> expected) {
+        System.out.println("");
+        List<String> result = splitString(input);
+        boolean pass = result.equals(expected);
+        __testResults +=
+                String.format(
+                        "splitString(\"%s\") -> %s | %s | %s \n", input, expected, result, pass ? "OK " : "X ");
+    }
+
+    private static String __testResults = "";
+
+    public static void main(String[] args) {
+        testSplitString("Hello", List.of("H", "e", "l", "l", "o"));
+        testSplitString("World", List.of("W", "o", "r", "l", "d"));
+        testSplitString("Hello World", List.of("H", "e", "l", "l", "o", " ", "W", "o", "r", "l", "d"));
+        System.out.println("Function Call -> Expected | Yours | Pass?\n");
+        System.out.println(__testResults);
+    }
+}

app/src/main/java/assignments/lists1/SquareList.java

@@ -0,0 +1,36 @@
+package assignments.lists1;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class SquareList {
+    // Create a function that accepts a list of ints and returns a list of the squares of those ints.
+
+    // vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv YOUR CODE vvvvvvvvvvvvvvvvvvvvvvvvvvvvv
+
+    private static ArrayList<Integer> squareList(ArrayList<Integer> input) {
+        return new ArrayList<Integer>();
+    }
+
+    // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ YOUR CODE ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+    private static void testSquareList(List<Integer> input, List<Integer> expected) {
+        System.out.println("");
+        List<Integer> result = squareList(new ArrayList(input));
+        boolean pass = result.equals(expected);
+        __testResults +=
+                String.format(
+                        "squareList(%s) -> %s | %s | %s \n", input, expected, result, pass ? "OK " : "X ");
+    }
+
+    private static String __testResults = "";
+
+    public static void main(String[] args) {
+        testSquareList(List.of(1, 2, 3), List.of(1, 4, 9));
+        testSquareList(List.of(2, 4, 6), List.of(4, 16, 36));
+        testSquareList(List.of(0, 0, 0), List.of(0, 0, 0));
+        testSquareList(List.of(-1, -2, -3), List.of(1, 4, 9));
+        System.out.println("Function Call -> Expected | Yours | Pass?\n");
+        System.out.println(__testResults);
+    }
+}

app/src/main/java/assignments/lists1/SumUntil.java

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+package assignments.lists1;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class SumUntil {
+    // Create a function that calculates the sum of numbers in a list.
+    // Once the sum exceeds 20, or you run out of numbers, stop adding numbers and return the sum.
+
+    // vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv YOUR CODE vvvvvvvvvvvvvvvvvvvvvvvvvvvvv
+
+    private static int sumUntil(ArrayList<Integer> input) {
+        return 0;
+    }
+
+    // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ YOUR CODE ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+    private static void testSumUntil(List<Integer> input, int expected) {
+        System.out.println("");
+        int result = sumUntil(new ArrayList(input));
+        boolean pass = result == expected;
+        __testResults +=
+                String.format(
+                        "sumUntil(%s) -> %s | %s | %s \n", input, expected, result, pass ? "OK " : "X ");
+    }
+
+    private static String __testResults = "";
+
+    public static void main(String[] args) {
+        testSumUntil(List.of(5, 10, 6, 5), 21);
+        testSumUntil(List.of(2, 4, 6), 12);
+        testSumUntil(List.of(10, 10, 10), 30);
+        testSumUntil(List.of(0, 0, 0), 0);
+        System.out.println("Function Call -> Expected | Yours | Pass?\n");
+        System.out.println(__testResults);
+    }
+}