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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 <code>fn</code> only returns numbers and those numbers determine the sort order of <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> </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) => 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 = [{"x": 1}, {"x": 0}, {"x": -1}], fn = (d) => d.x\n<strong>Output:</strong> [{"x": -1}, {"x": 0}, {"x": 1}]\n<strong>Explanation:</strong> fn returns the value for the "x" 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) => 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. \n</pre>\n\n<p> </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 <= arr.length <= 5 * 10<sup>5</sup></code></li>\n</ul>\n" ,
"translatedTitle" : "排序方式" ,
"translatedContent" : "<p>给定一个数组 <code>arr</code> 和一个函数 <code>fn</code>，返回一个排序后的数组 <code>sortedArr</code>。你可以假设 <code>fn</code> 只返回数字，并且这些数字决定了 <code>sortedArr</code> 的排序顺序。<code>sortedArr</code> 必须按照 <code>fn</code> 的输出值 <strong>升序</strong> 排序。</p>\n\n<p>你可以假设对于给定的数组，<code>fn</code> 不会返回重复的数字。</p>\n\n<p> </p>\n\n<p><strong class=\"example\">示例 1： ： ： ,
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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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