Pangram & PowerofTow algorithms

Author: melmedany

Diff for: src/main/java/Pangram.java

@@ -0,0 +1,32 @@
+
+/**
+ * @author medany
+ */
+
+/*
+ * a word or sentence is called to be pangram if it contains all the alphabet
+ * letters.
+ */
+public class Pangram {
+
+	public String solve(String[] strings) {
+		StringBuilder result = new StringBuilder();
+		for (String string : strings) {
+			String alphabet = "abcdefghijklmnopqrstuvwxyz";
+			for (int i = 0; i < string.length(); i++) {
+				char current = string.charAt(i);
+				if (alphabet.indexOf(current) != -1) {
+					alphabet = alphabet.replace("" + current, "");
+					if (alphabet.length() == 0) {
+						result.append(1);
+					}
+				}
+			}
+			if (!(alphabet.length() == 0)) {
+				result.append(0);
+			}
+		}
+		return result.toString();
+	}
+
+}

Diff for: src/main/java/PowerofTwo.java

@@ -0,0 +1,17 @@
+
+/**
+ * @author medany
+ */
+
+public class PowerofTwo {
+
+	public int[] solve(int[] nums) {
+		int[] result = new int[nums.length];
+		for (int i = 0; i < nums.length; i++) {
+			boolean test = nums[i] > 0 && ((nums[i] & (nums[i] - 1)) == 0);
+			result[i] = test ? 1 : 0;
+		}
+		return result;
+	}
+
+}

Diff for: test/main/java/PangramTest.java

@@ -0,0 +1,24 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author medany
+ */
+
+public class PangramTest {
+
+	private Pangram alg = new Pangram();
+	private String actual, expected;
+
+	@Test
+	public void Test_1() {
+
+		actual = alg.solve(new String[] { "we promptly judged antique ivory buckles for the next prize",
+				"we promptly judged antique ivory buckles for the prizes",
+				"the quick brown fox jumps over the lazy dog", "the quick brown fox jump over the lazy dog" });
+		expected = "1010";
+
+		Assert.assertEquals(expected, actual);
+	}
+
+}

Diff for: test/main/java/PowerofTwoTest.java

@@ -0,0 +1,22 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author medany
+ */
+
+public class PowerofTwoTest {
+
+	private PowerofTwo alg = new PowerofTwo();
+	private int[] actual, expected;
+
+	@Test
+	public void Test_1() {
+
+		actual = alg.solve(new int[] { 1, 2, 3, -1, 15, 11, 12 });
+		expected = new int[] { 1, 1, 0, 0, 0, 0, 0 };
+
+		Assert.assertArrayEquals(expected, actual);
+	}
+
+}