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59 lines
12 KiB
JSON
59 lines
12 KiB
JSON
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"title": "Join Two Arrays by ID",
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"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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"translatedTitle": "根据 ID 合并两个数组",
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"translatedContent": "<p>现给定两个数组 <code>arr1</code> 和 <code>arr2</code> ，返回一个新的数组 <code>joinedArray</code> 。两个输入数组中的每个对象都包含一个 <code>id</code> 字段。<code>joinedArray</code> 是一个通过 <code>id</code> 将 <code>arr1</code> 和 <code>arr2</code> 连接而成的数组。<code>joinedArray</code> 的长度应为唯一值 <code>id</code> 的长度。返回的数组应按 <code>id</code> <strong>升序</strong> 排序。</p>\n\n<p>如果一个 <code>id</code> 存在于一个数组中但不存在于另一个数组中，则该对象应包含在结果数组中且不进行修改。</p>\n\n<p>如果两个对象共享一个 <code>id</code> ，则它们的属性应进行合并：</p>\n\n<ul>\n\t<li>如果一个键只存在于一个对象中，则该键值对应该包含在对象中。</li>\n\t<li>如果一个键在两个对象中都包含，则 <code>arr2</code> 中的值应覆盖 <code>arr1</code> 中的值。</li>\n</ul>\n\n<p> </p>\n\n<p><strong class=\"example\">示例 1：</strong></p>\n\n<pre>\n<b>输入：</b>\narr1 = [\n {\"id\": 1, \"x\": 1},\n {\"id\": 2, \"x\": 9}\n], \narr2 = [\n {\"id\": 3, \"x\": 5}\n]\n<b>输出：</b>\n[\n {\"id\": 1, \"x\": 1},\n {\"id\": 2, \"x\": 9},\n {\"id\": 3, \"x\": 5}\n]\n<b>解释：</b>没有共同的 id，因此将 arr1 与 arr2 简单地连接起来。\n</pre>\n\n<p><strong class=\"example\">示例 2：</strong></p>\n\n<pre>\n<b>输入：</b>\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<b>输出：</b>\n[\n {\"id\": 1, \"x\": 2, \"y\": 3},\n {\"id\": 2, \"x\": 10, \"y\": 20},\n {\"id\": 3, \"x\": 0, \"y\": 0}\n]\n<b>解释：</b>id 为 1 和 id 为 3 的对象在结果数组中保持不变。id 为 2 的两个对象合并在一起。arr2 中的键覆盖 arr1 中的值。\n</pre>\n\n<p><strong class=\"example\">示例 3：</strong></p>\n\n<pre>\n<b>输入：</b>\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>输出：</strong> [\n {\"id\": 1, \"b\": {\"c\": 84}, \"v\": [1, 3], \"y\": 48}\n]\n<b>解释：</b>具有 id 为 1 的对象合并在一起。对于键 \"b\" 和 \"v\" ，使用 arr2 中的值。由于键 \"y\" 只存在于 arr1 中，因此取 arr1 的值。</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>arr1 和 arr2 都是有效的 JSON 数组</code></li>\n\t<li><code>在 arr1 和 arr2 中都有唯一的键值 id</code></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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