Add mergeSortedArrays

snippets/mergeSortedArrays.md

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+---
+title: mergeSortedArrays
+tags: array,intermediate
+---
+
+Merges two sorted arrays into one.
+
+- Use the spread operator (`...`) to clone both of the given arrays.
+- Use `Array.from()` to create an array of the appropriate length based on the given arrays.
+- Use `Array.prototype.shift()` to populate the newly created array from the removed elements of the cloned arrays.
+
+```js
+const mergeSortedArrays = (a, b) => {
+  const _a = [...a],
+    _b = [...b];
+  return Array.from({ length: _a.length + _b.length }, () => {
+    if (!_a.length) return _b.shift();
+    else if (!_b.length) return _a.shift();
+    else return _a[0] > _b[0] ? _b.shift() : _a.shift();
+  });
+};
+```
+
+```js
+mergeSortedArrays([1, 4, 5], [2, 3, 6]); // [1, 2, 3, 4, 5, 6]
+```