Merge two sorted arrays into one

8_kyu/Merge two sorted arrays into one/README.md

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+## Merge two sorted arrays into one
+
+You are given two sorted arrays that both only contain integers. Your task is to find a way to merge them into a single one, sorted in asc order. Complete the function mergeArrays(arr1, arr2), where arr1 and arr2 are the original sorted arrays.
+
+You don't need to worry about validation, since arr1 and arr2 must be arrays with 0 or more Integers. If both arr1 and arr2 are empty, then just return an empty array.
+
+Note: arr1 and arr2 may be sorted in different orders. Also arr1 and arr2 may have same integers. Remove duplicated in the returned result.
+
+**Examples (input -> output)**
+
+```
+* [1, 2, 3, 4, 5], [6, 7, 8, 9, 10] -> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+
+* [1, 3, 5, 7, 9], [10, 8, 6, 4, 2] -> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+
+* [1, 3, 5, 7, 9, 11, 12], [1, 2, 3, 4, 5, 10, 12] -> [1, 2, 3, 4, 5, 7, 9, 10, 11, 12]
+```

8_kyu/Merge two sorted arrays into one/index.test.ts

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+import { mergeArrays } from "./index";
+
+describe("Tests", () => {
+    it("test", () => {
+        expect(mergeArrays([1, 2, 3, 4], [5, 6, 7, 8])).toEqual([1, 2, 3, 4, 5, 6, 7, 8]);
+        expect(mergeArrays([1, 3, 5, 7, 9], [10, 8, 6, 4, 2])).toEqual([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+        expect(mergeArrays([1, 3, 5, 7, 9, 11, 12], [1, 2, 3, 4, 5, 10, 12])).toEqual([
+            1, 2, 3, 4, 5, 7, 9, 10, 11, 12,
+        ]);
+    });
+});

8_kyu/Merge two sorted arrays into one/index.ts

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+export function mergeArrays(arr1: number[], arr2: number[]): number[] {
+    return [...new Set(arr1.concat(arr2))].sort((a, b) => a - b);
+}

README.md

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 ### Katas solved
 
-`Total`: 43 \
-`8_kyu`: 41 \
+`Total`: 44 \
+`8_kyu`: 42 \
 `7_kyu`: 0 \
 `6_kyu`: 2 \
 `5_kyu`: 0 \