feat: kata/even-numbers-in-an-array (#788)

* docs: kata description

* feat: kata/even-numbers-in-an-array

---------

Co-authored-by: ParanoidUser <5120290+ParanoidUser@users.noreply.github.com>

Author: github-actions[bot]

kata/7-kyu/even-numbers-in-an-array/README.md

@@ -0,0 +1,12 @@
+# [Even numbers in an array](https://www.codewars.com/kata/even-numbers-in-an-array "https://www.codewars.com/kata/5a431c0de1ce0ec33a00000c")
+
+Given an `array` of numbers, return a new array of length `number` containing the last even numbers from the original array (in the same
+order). The original array will be not empty and will contain at least "number" even numbers.
+
+For example:
+
+```
+([1, 2, 3, 4, 5, 6, 7, 8, 9], 3) => [4, 6, 8]
+([-22, 5, 3, 11, 26, -6, -7, -8, -9, -8, 26], 2) => [-8, 26]
+([6, -25, 3, 7, 5, 5, 7, -3, 23], 1) => [6]
+```

kata/7-kyu/even-numbers-in-an-array/main/Kata.java

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+interface Kata {
+  static int[] evenNumbers(int[] arr, int n) {
+    int[] evens = new int[n];
+    for (int i = arr.length - 1; n > 0; i--) {
+      if (arr[i] % 2 == 0) {
+        evens[--n] = arr[i];
+      }
+    }
+    return evens;
+  }
+}

kata/7-kyu/even-numbers-in-an-array/test/EvenNumbersTest.java

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+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.params.provider.Arguments.arguments;
+
+import java.util.stream.Stream;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+class EvenNumbersTest {
+  private static Stream<Arguments> testData() {
+    return Stream.of(
+        arguments(new int[]{1, 2, 3, 4, 5, 6, 7, 8, 9}, 3, new int[]{4, 6, 8}),
+        arguments(new int[]{-22, 5, 3, 11, 26, -6, -7, -8, -9, -8, 26}, 2, new int[]{-8, 26}),
+        arguments(new int[]{6, -25, 3, 7, 5, 5, 7, -3, 23}, 1, new int[]{6})
+    );
+  }
+
+  @ParameterizedTest
+  @MethodSource("testData")
+  void sample(int[] array, int number, int[] expected) {
+    assertArrayEquals(expected, Kata.evenNumbers(array, number));
+  }
+}

kata/7-kyu/index.md

@@ -159,6 +159,7 @@
 - [Eliminate the intruders! Bit manipulation](eliminate-the-intruders-bit-manipulation "5a0d38c9697598b67a000041")
 - [Email Address Obfuscator](email-address-obfuscator "562d8d4c434582007300004e")
 - [E.S.P.  Cards](esp-cards "596ef174e4cab6813600004d")
+- [Even numbers in an array](even-numbers-in-an-array "5a431c0de1ce0ec33a00000c")
 - [Even or Odd - Which is Greater?](even-or-odd-which-is-greater "57f7b8271e3d9283300000b4")
 - [Excel sheet column numbers](excel-sheet-column-numbers "55ee3ebff71e82a30000006a")
 - [Excessively Abundant Numbers](excessively-abundant-numbers "56a75b91688b49ad94000015")