leetcode-problemset/leetcode/originData/sort-by.json

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            "title": "Sort By",
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            "content": "<p>Given an array <code>arr</code> and a function <code>fn</code>, return a sorted array <code>sortedArr</code>. You can assume&nbsp;<code>fn</code>&nbsp;only returns numbers and those numbers determine the sort order of&nbsp;<code>sortedArr</code>. <code>sortedArray</code> must be sorted in <strong>ascending order</strong> by <code>fn</code> output.</p>\n\n<p>You may assume that <code>fn</code> will never duplicate numbers for a given array.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> arr = [5, 4, 1, 2, 3], fn = (x) =&gt; x\n<strong>Output:</strong> [1, 2, 3, 4, 5]\n<strong>Explanation:</strong> fn simply returns the number passed to it so the array is sorted in ascending order.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> arr = [{&quot;x&quot;: 1}, {&quot;x&quot;: 0}, {&quot;x&quot;: -1}], fn = (d) =&gt; d.x\n<strong>Output:</strong> [{&quot;x&quot;: -1}, {&quot;x&quot;: 0}, {&quot;x&quot;: 1}]\n<strong>Explanation:</strong> fn returns the value for the &quot;x&quot; key. So the array is sorted based on that value.\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> arr = [[3, 4], [5, 2], [10, 1]], fn = (x) =&gt; x[1]\n<strong>Output:</strong> [[10, 1], [5, 2], [3, 4]]\n<strong>Explanation:</strong> arr is sorted in ascending order by number at index=1.&nbsp;\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>arr is a valid JSON array</code></li>\n\t<li><code>fn is a function that returns a number</code></li>\n\t<li><code>1 &lt;=&nbsp;arr.length &lt;= 5 * 10<sup>5</sup></code></li>\n</ul>\n",
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                    "code": "/**\n * @param {Array} arr\n * @param {Function} fn\n * @return {Array}\n */\nvar sortBy = function(arr, fn) {\n    \n};",
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                    "code": "type JSONValue = null | boolean | number | string | JSONValue[] | { [key: string]: JSONValue };\ntype Fn = (value: JSONValue) => number\n\nfunction sortBy(arr: JSONValue[], fn: Fn): JSONValue[] {\n\t\n};",
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