Merge branch 'develop'

big-o/src/main/java/com/josdem/algorithms/LargestValueRunner.java

@@ -0,0 +1,14 @@
+package com.josdem.algorithms;
+
+import java.util.List;
+
+/*  Type: Largest number in the array Algorithm – O(n * k)
+    Description: Largest number in the collection
+ */
+
+public class LargestValueRunner {
+
+    public int getNumber(List<Integer> numbers) {
+        return numbers.stream().filter(it -> it % 2 == 0).max(Integer::compare).orElseThrow(() -> new RuntimeException("No number was found"));
+    }
+}

big-o/src/main/java/com/josdem/algorithms/PrimeNumberRunner.java

@@ -0,0 +1,33 @@
+package com.josdem.algorithms;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.logging.Logger;
+
+/*  Type: Array size plus compute logic Algorithm – O(a * p)
+    Description: Collection size plus compute logic of getting largest prime number
+ */
+
+public class PrimeNumberRunner {
+
+    private final Logger log = Logger.getLogger(this.getClass().getName());
+
+    public List<Integer> getNumber(List<Integer> numbers) {
+        List<Integer> result = new ArrayList<>();
+        numbers.forEach(it -> {
+            if (isPrime(it)) {
+                log.info("prime:" + it);
+                result.add(it);
+            }
+        });
+        return result;
+    }
+
+    private boolean isPrime(int number) {
+        if (number < 2) return false;
+        for (int i = 2; i < number; i++) {
+            if (number % i == 0) return false;
+        }
+        return true;
+    }
+}

big-o/src/test/java/com/josdem/algorithms/LargestValueRunnerTest.java

@@ -0,0 +1,21 @@
+package com.josdem.algorithms;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class LargestValueRunnerTest {
+
+    private final LargestValueRunner largestValueRunner = new LargestValueRunner();
+
+    @Test
+    @DisplayName("show largest value algorithm")
+    void shouldTestLargestValue(){
+        List<Integer> numbers = List.of(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
+        int expectedNumber = 8;
+        assertEquals(expectedNumber, largestValueRunner.getNumber(numbers), "should get largest even value");
+    }
+}

big-o/src/test/java/com/josdem/algorithms/PrimeNumberRunnerTest.java

@@ -0,0 +1,21 @@
+package com.josdem.algorithms;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class PrimeNumberRunnerTest {
+
+    private final PrimeNumberRunner primeNumberRunner = new PrimeNumberRunner();
+
+    @Test
+    @DisplayName("show array plus compute logic algorithm")
+    void shouldReturnLargestPrimeNumber(){
+        List<Integer> numbers = List.of(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
+        List<Integer> expectedNumbers = List.of(2, 3, 5, 7);
+        assertEquals(expectedNumbers, primeNumberRunner.getNumber(numbers), "should get largest prime number in the array");
+    }
+}