feat(7-kyu): kata/find-min-and-max (#403)

ParanoidUser · Jul 31, 2023 · 2a1d391 · 2a1d391
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diff --git a/docs/README.md b/docs/README.md
@@ -1,7 +1,7 @@
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@@ -25,7 +25,7 @@ slug.
 
 | [1 kyu](/kata/1-kyu/index.md) | [2 kyu](/kata/2-kyu/index.md) | [3 kyu](/kata/3-kyu/index.md) | [4 kyu](/kata/4-kyu/index.md) | [5 kyu](/kata/5-kyu/index.md) | [6 kyu](/kata/6-kyu/index.md) | [7 kyu](/kata/7-kyu/index.md) | [8 kyu](/kata/8-kyu/index.md) | [beta](/kata/beta/index.md) | [retired](/kata/retired/index.md) |
 |:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:---------------------------:|:---------------------------------:|
-|               -               |               1               |               2               |              18               |              36               |              410              |              547              |              200              |             57              |                76                 |
+|               -               |               1               |               2               |              18               |              36               |              410              |              548              |              200              |             57              |                76                 |
 
 **Note:** The source code is written in Java 17 and may use language features that are incompatible
 with Java 8, 11.

diff --git a/kata/7-kyu/find-min-and-max/README.md b/kata/7-kyu/find-min-and-max/README.md
@@ -0,0 +1,3 @@
+# [Find min and max](https://www.codewars.com/kata/find-min-and-max "https://www.codewars.com/kata/57a1ae8c7cb1f31e4e000130")
+
+Implement a function that returns the minimal and the maximal value of a list (in this order).
diff --git a/kata/7-kyu/find-min-and-max/main/MinMax.java b/kata/7-kyu/find-min-and-max/main/MinMax.java
@@ -0,0 +1,8 @@
+import java.util.List;
+
+interface MinMax {
+  static int[] getMinMax(List<Integer> list) {
+    var stats = list.stream().mapToInt(i -> i).summaryStatistics();
+    return new int[]{stats.getMin(), stats.getMax()};
+  }
+}
diff --git a/kata/7-kyu/find-min-and-max/test/SolutionTest.java b/kata/7-kyu/find-min-and-max/test/SolutionTest.java
@@ -0,0 +1,14 @@
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+
+class SolutionTest {
+  @Test
+  void sample() {
+    assertArrayEquals(new int[]{1, 1}, MinMax.getMinMax(List.of(1)));
+    assertArrayEquals(new int[]{1, 2}, MinMax.getMinMax(List.of(1, 2)));
+    assertArrayEquals(new int[]{1, 2}, MinMax.getMinMax(List.of(2, 1)));
+  }
+}
diff --git a/kata/7-kyu/index.md b/kata/7-kyu/index.md
@@ -162,6 +162,7 @@
 - [Find Count of Most Frequent Item in an Array](find-count-of-most-frequent-item-in-an-array)
 - [Find Fibonacci last digit](find-fibonacci-last-digit)
 - [Find Max Tree Node](find-max-tree-node)
+- [Find min and max](find-min-and-max)
 - [Find Screen Size](find-screen-size)
 - [Find sum of top-left to bottom-right diagonals](find-sum-of-top-left-to-bottom-right-diagonals)
 - [Find the index of the second occurrence of a letter in a string](find-the-index-of-the-second-occurrence-of-a-letter-in-a-string)