"content":"<p>Given two arrays <code>arr1</code> and <code>arr2</code>, return a new array <code>joinedArray</code>. All the objects in each of the two inputs arrays will contain an <code>id</code> field that has an integer value. <code>joinedArray</code> is an array formed by merging <code>arr1</code> and <code>arr2</code> based on their <code>id</code> key. The length of <code>joinedArray</code> should be the length of unique values of <code>id</code>. The returned array should be sorted in <strong>ascending</strong> order based on the <code>id</code> key.</p>\n\n<p>If a given <code>id</code> exists in one array but not the other, the single object with that <code>id</code> should be included in the result array without modification.</p>\n\n<p>If two objects share an <code>id</code>, their properties should be merged into a single object:</p>\n\n<ul>\n\t<li>If a key only exists in one object, that single key-value pair should be included in the object.</li>\n\t<li>If a key is included in both objects, the value in the object from <code>arr2</code> should override the value from <code>arr1</code>.</li>\n</ul>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> \narr1 = [\n {"id": 1, "x": 1},\n {"id": 2, "x": 9}\n], \narr2 = [\n {"id": 3, "x": 5}\n]\n<strong>Output:</strong> \n[\n {"id": 1, "x": 1},\n {"id": 2, "x": 9},\n {"id": 3, "x": 5}\n]\n<strong>Explanation:</strong> There are no duplicate ids so arr1 is simply concatenated with arr2.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> \narr1 = [\n {"id": 1, "x": 2, "y": 3},\n {"id": 2, "x": 3, "y": 6}\n], \narr2 = [\n {"id": 2, "x": 10, "y": 20},\n {"id": 3, "x": 0, "y": 0}\n]\n<strong>Output:</strong> \n[\n {"id": 1, "x": 2, "y": 3},\n {"id": 2, "x": 10, "y": 20},\n {"id": 3, "x": 0, "y": 0}\n]\n<strong>Explanation:</strong> The two objects with id=1 and id=3 are included in the result array without modifiction. The two objects with id=2 are merged together. The keys from arr2 override the values in arr1.\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> \narr1 = [\n {"id": 1, "b": {"b": 94},"v": [4, 3], "y": 48}\n]\narr2 = [\n {"id": 1, "b": {"c": 84}, "v": [1, 3]}\n]\n<strong>Output:</strong> [\n {"id": 1, "b": {"c": 84}, "v": [1, 3], "y": 48}\n]\n<strong>Explanation:</strong> The two objects with id=1 are merged together. For the keys "b" and "v" the values from arr2 are used. Since the key "y" only exists in arr1, that value is taken form arr1.</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>arr1</code> and <code>arr2</code> are valid JSON arrays</li>\n\t<li>Each object in <code>arr1</code> and <code>arr2</code> has a unique integer <code>id</code> key</li>\n\t<li><code>2 <= JSON.stringify(arr1).length <= 10<sup>6</sup></code></li>\n\t<li><code>2 <= JSON.stringify(arr2).length <= 10<sup>6</sup></code></li>\n</ul>\n",
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