- Upload a working version of ArrayUtility

- Upload a decomplied CSVUtilityGiven

Week9/Assignment9/data.txt

@@ -0,0 +1,7 @@
+1st line
+2nd line
+3rd line
+4th line
+5th line
+6th line
+7th line

Week9/Assignment9/golf-score-1.csv

@@ -0,0 +1,11 @@
+course-02
+Player01,4,4,6,3,4,5,4,6,6,6,3,5,4,6,4,4,3,6
+Player02,4,5,6,4,5,4,5,4,8,9,4,5,5,6,5,4,4,5
+Player03,4,5,5,4,6,5,5,5,7,6,3,6,4,6,5,5,4,5
+Player04,5,6,4,3,5,4,4,4,6,5,2,7,4,7,5,7,4,6
+Player05,4,3,4,4,4,5,4,4,5,5,4,5,5,5,5,4,5,4
+Player06,3,4,4,3,3,4,4,4,5,5,4,5,3,5,3,4,3,6
+Player07,6,4,6,4,5,5,5,3,6,4,4,5,4,5,5,5,3,4
+Player08,4,6,5,3,4,6,4,3,4,4,2,5,4,5,4,4,3,4
+Player09,5,5,8,4,5,4,4,3,5,5,4,5,3,6,6,5,4,5
+Player10,5,4,5,3,4,4,4,2,5,5,3,6,4,5,4,6,5,5

Week9/Assignment9/golf-score-2.csv

@@ -0,0 +1,25 @@
+course-04
+Player01,4,4,6,3,4,5,4,6,6,6,3,5,4,6,4,4,3,6
+Player02,4,5,6,4,5,4,5,4,8,9,4,5,5,6,5,4,4,5
+Player03,4,5,5,4,6,5,5,5,7,6,3,6,4,6,5,5,4,5
+Player04,5,6,4,3,5,4,4,4,6,5,2,7,4,7,5,7,4,6
+Player05,4,3,4,4,4,5,4,4,5,5,4,5,5,5,5,4,5,4
+Player06,3,4,4,3,3,4,4,4,5,5,4,5,3,5,3,4,3,6
+Player07,6,4,6,4,5,5,5,3,6,4,4,5,4,5,5,5,3,4
+Player08,4,6,5,3,4,6,4,3,4,4,2,5,4,5,4,4,3,4
+Player09,5,5,8,4,5,4,4,3,5,5,4,5,3,6,6,5,4,5
+Player10,5,4,5,3,4,4,4,2,5,5,3,6,4,5,4,6,5,5
+Player11,4,6,5,3,5,4,4,3,5,4,2,4,4,5,5,6,3,4
+Player12,4,5,5,3,4,5,4,5,4,4,3,6,4,6,4,4,4,4
+Player13,6,6,6,3,5,4,6,4,5,5,3,5,3,6,5,4,4,6
+Player14,4,6,5,3,5,4,4,4,5,4,4,6,4,6,7,4,4,5
+Player15,5,4,5,4,6,6,4,3,5,5,4,5,4,5,5,4,4,5
+Player16,5,4,5,3,5,4,5,4,7,8,3,5,4,5,5,4,4,4
+Player17,6,4,5,3,5,6,4,3,5,4,3,5,5,9,5,3,3,4
+Player18,5,6,5,4,5,6,4,4,5,5,2,5,4,6,7,5,3,7
+Player19,4,4,6,4,4,6,4,3,6,7,3,5,4,5,4,4,4,5
+Player20,5,4,6,3,4,4,4,3,5,5,3,5,5,6,5,6,4,5
+Player21,4,4,7,2,4,5,4,3,5,6,3,7,4,5,4,4,5,4
+Player22,6,4,7,4,5,6,5,4,5,5,4,7,4,4,5,5,4,5
+Player23,5,4,7,3,5,5,6,4,5,6,3,5,4,6,4,4,3,6
+Player24,6,4,6,4,4,4,4,3,5,4,5,5,3,6,5,3,5,5

Week9/Assignment9/src/ArrayUtility.java

@@ -0,0 +1,59 @@
+import java.util.Arrays;
+
+public class ArrayUtility {
+	
+	/**
+	 * combines a given 2D array into 1D array
+	 * for example,
+	 * { {1, 2}, {3, 4, 5} } -> {1, 2, 3, 4, 5}
+	 * @param d
+	 * @return 1D array of combine all elements from 2D array
+	 */
+	public static int[] merge(int[][] d) {
+		int length = 0;
+		for(int i = 0;i < d.length;i++)length+=d[i].length;
+		int[] merged_array = new int[length];
+		int current_index = 0;
+		for(int i = 0;i < d.length;i++)for(int j = 0;j < d[i].length;j++) {
+			merged_array[current_index] = d[i][j];
+			current_index++;
+		}
+		return merged_array;
+	}
+	
+	/** 
+	 * splits a given 1D array into 2D array with n equal parts
+	 * if the given array cannot be split into n equal part
+	 * this method should return 2D array of size 0,0 (new int[0][0])
+	 * @param d
+	 * @param n number of parts for the target, 0 < n <= d.length
+	 * @return 2D array
+	 */
+	public static int[][] split(int[] d, int n) {
+		if(n<=0) return new int[0][0]; //Return to prevent ArithmeticException: / by zero and negative array index
+		if (d.length%n!=0)return new int[0][0]; //Return, not array is not splittable
+		int[][] splitted_array = new int[n][d.length/n]; //Create the splitted_array array and initialize it
+		for(int i = 0;i < n;i++)for(int j = 0;j<d.length/n;j++)splitted_array[i][j] = d[j*n+i];
+		return splitted_array;
+	}
+
+	public static void show(String[] x) {
+		System.out.println(Arrays.toString(x));
+	}
+
+	public static void show(String[][] x2d) {
+		for (String[] x : x2d) {
+			show(x);
+		}
+	}
+
+	public static void show(int[] x) {
+		System.out.println(Arrays.toString(x));
+	}
+	
+	public static void show(int[][] x2d) {
+		for (int[] x : x2d) {
+			show(x);
+		}
+	}
+}

Week9/Assignment9/src/ArrayUtilityTest.java

@@ -0,0 +1,49 @@
+
+public class ArrayUtilityTest {
+	public static void main(String[] args) {
+		testMerge();
+		testSplit();
+	}
+	
+	public static void myTestSplit() {
+		// add your code and some testcases the test split() similar to testSplit()
+	}
+
+	public static void myTestMerge() {
+		// add your code and some testcases the test merge() similar to testMerge()
+	}
+
+	// do no modify this method
+	private static void testSplit() {
+		int[] c = { 1, 2, 3, 4, 5, 6 };
+		ArrayUtility.show(ArrayUtility.split(c, 1));
+		System.out.println("Expected:\n[1, 2, 3, 4, 5, 6]\n----------");
+		ArrayUtility.show(ArrayUtility.split(c, 2));
+		System.out.println("Expected:\n[1, 2, 3]\n[4, 5, 6]\n----------");
+		ArrayUtility.show(ArrayUtility.split(c, 3));
+		System.out.println("Expected:\n[1, 2]\n[3, 4]\n[5, 6]\n----------");
+		ArrayUtility.show(ArrayUtility.split(c, 4));
+		System.out.println("Expected: Array size 6 cannot be splitted into 4 parts\n----------");
+		ArrayUtility.show(ArrayUtility.split(c, 5));
+		System.out.println("Expected: Array size 6 cannot be splitted into 5 parts\n----------");
+		ArrayUtility.show(ArrayUtility.split(c, 6));
+		System.out.println("Expected:\n[1]\n[2]\n[3]\n[4]\n[5]\n[6]\n----------");
+		ArrayUtility.show(ArrayUtility.split(c, 0));
+		System.out.println("Expected: n must be >= 0\n----------");
+		ArrayUtility.show(ArrayUtility.split(c, -1));
+		System.out.println("Expected: n must be >= 0\n----------");
+		ArrayUtility.show(ArrayUtility.split(c, 7));
+		System.out.println("Expected: n cannot be greater than array's size, 6\n----------");
+	}
+
+	// do not modify this method
+	private static void testMerge() {
+		int[][] a = { { 1, 2, 3 }, { 4, 5 }, { 6, 7, 8, 9 }, { 10 } };
+		ArrayUtility.show(ArrayUtility.merge(a));
+		System.out.println("[1, 2, 3, 4, 5, 6, 7, 8, 9, 10] - Expected");
+		int[][] b = { { 1, 2, 3, 4 }, { 4, 5, 6, 7 }, { 7, 8, 9, 10 }, { 10, 11, 12, 13 } };
+		ArrayUtility.show(ArrayUtility.merge(b));
+		System.out.println("[1, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 10, 10, 11, 12, 13] - Expected");
+	}
+
+}

Week9/Assignment9/src/CSVUtility.java

@@ -0,0 +1,42 @@
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Scanner;
+
+public class CSVUtility {
+	
+	/**
+	 * reads all lines in given filename into an array of String
+	 * @param filename
+	 * @return array of String, each element in array is each line in file
+	 * @throws FileNotFoundException
+	 */
+	public static String[] readFile(String filename) throws FileNotFoundException {
+		// ENTER CODE HERE
+		Scanner sc = new Scanner(new File(filename));
+		int length = 0;
+		for(length = 0;sc.hasNext();length++)sc.nextLine();
+		String[] filedata = new String[length];
+		sc = new Scanner(new File(filename));
+		sc = new Scanner(new File(filename)).useDelimiter(",");
+		for(int i = 0;i<=length;i++)filedata[i]=sc.next();
+		return filedata;
+	}
+
+	/**
+	 * read given CSV file into 2D array of String
+	 * @param filename CSV file
+	 * @param header true if CSV file has a header line.  The first line is header. The data start from second line.
+	 * @return
+	 * @throws FileNotFoundException
+	 */
+	public static String[][] readCSV(String filename, boolean header) throws FileNotFoundException {
+		// ENTER CODE HERE
+		return null;
+	}
+
+
+	
+}

Week9/Assignment9/src/CSVUtilityGiven.java

@@ -0,0 +1,51 @@
+//
+// Source code recreated from a .class file by SNLinter
+// (powered by FernFlower decompiler)
+//
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class CSVUtilityGiven {
+    public CSVUtilityGiven() {
+    }
+
+    public static String[] readFile(String var0) throws FileNotFoundException {
+        Scanner var1 = new Scanner(new File(var0));
+        ArrayList var2 = new ArrayList();
+
+        while(var1.hasNext()) {
+            var2.add(var1.nextLine());
+        }
+
+        var1.close();
+        String[] var3 = new String[var2.size()];
+
+        for(int var4 = 0; var4 < var3.length; ++var4) {
+            var3[var4] = (String)var2.get(var4);
+        }
+
+        return var3;
+    }
+
+    public static String[][] readCSV(String var0, boolean var1) throws FileNotFoundException {
+        String[] var2 = readFile(var0);
+        int var3 = var1 ? 1 : 0;
+        String[][] var4 = new String[var2.length - var3][];
+        int var5 = 0;
+
+        for(int var6 = var3; var5 < var4.length; ++var6) {
+            var4[var5] = var2[var6].split(",");
+            ++var5;
+        }
+
+        return var4;
+    }
+
+    public static void main(String[] var0) throws FileNotFoundException {
+        ArrayUtility.show(readCSV("course-db.csv", false));
+        ArrayUtility.show(readCSV("golf-score.csv", false));
+    }
+}

Week9/Assignment9/src/CSVUtilityTest.java

@@ -0,0 +1,31 @@
+import java.io.FileNotFoundException;
+
+public class CSVUtilityTest {
+	public static void main(String[] args) throws FileNotFoundException {
+		System.out.println("Expected:");
+		ArrayUtility.show(CSVUtilityGiven.readFile("data.txt"));
+		System.out.println("Your result:");
+		ArrayUtility.show(CSVUtility.readFile("data.txt"));
+		System.out.println("----------------------------------------");
+		System.out.println("Expected:");
+		ArrayUtility.show(CSVUtilityGiven.readCSV("data.txt", false));
+		System.out.println("Your result:");
+		ArrayUtility.show(CSVUtility.readCSV("data.txt", false));
+		System.out.println("----------------------------------------");
+		System.out.println("Expected:");
+		ArrayUtility.show(CSVUtilityGiven.readCSV("data.txt", true));
+		System.out.println("Your result:");
+		ArrayUtility.show(CSVUtility.readCSV("data.txt", true));
+		System.out.println("----------------------------------------");
+		System.out.println("Expected:");
+		ArrayUtility.show(CSVUtilityGiven.readCSV("course-db.csv", false));
+		System.out.println("Your result:");
+		ArrayUtility.show(CSVUtility.readCSV("course-db.csv", false));
+		System.out.println("----------------------------------------");
+		System.out.println("Expected:");
+		ArrayUtility.show(CSVUtilityGiven.readCSV("course-db.csv", true));
+		System.out.println("Your result:");
+		ArrayUtility.show(CSVUtility.readCSV("course-db.csv", true));
+	}
+	
+}

Week9/Assignment9/src/module-info.java

@@ -1,2 +0,0 @@
-module Assignment9 {
-}