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{"docs/system_design/20260326152929.json": ["docs/prd/20260326152929.json"], "docs/task/20260326152929.json": ["docs/system_design/20260326152929.json"], "quick_sort_js/quickSort.js": ["docs/task/20260326152929.json", "docs/system_design/20260326152929.json"], "quick_sort_js/index.js": ["docs/task/20260326152929.json", "docs/system_design/20260326152929.json"]}
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docs/prd/20260326152929.json
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{"Language":"zh_cn","Programming Language":"JavaScript","Original Requirements":"一个JS写的数字的快速排序程序,无需UI,尽量简单","Project Name":"quick_sort_js","Product Goals":["实现简洁高效的快速排序算法","代码易于理解和维护","确保排序结果的正确性和性能"],"User Stories":["作为开发者,我希望能够对任意数字数组进行快速排序","作为开发者,我希望排序函数能够处理边界情况,如空数组或单元素数组","作为开发者,我希望代码简洁易读,方便直接引用或修改","作为开发者,我希望能够通过控制台输出验证排序结果"],"Competitive Analysis":["Lodash sortBy: 功能强大但库体积较大,适合复杂项目","Array.prototype.sort: 原生方法,简单易用,但排序算法不固定","bubble-sort-js: 冒泡排序实现,简单但性能较差","merge-sort-js: 归并排序实现,稳定但代码相对复杂","timsort: 高性能混合排序,功能强大但实现复杂","fast-sort: 功能丰富,支持多种排序方式,但依赖较多","简单手写快速排序: 轻量、无依赖,代码简洁,适合学习和小型项目"],"Competitive Quadrant Chart":"quadrantChart\n title \"排序库的简洁性与性能对比\"\n x-axis \"低性能\" --> \"高性能\"\n y-axis \"复杂\" --> \"简洁\"\n quadrant-1 \"理想选择\"\n quadrant-2 \"需要优化\"\n quadrant-3 \"不推荐\"\n quadrant-4 \"性能优先\"\n \"Lodash sortBy\": [0.7, 0.4]\n \"Array.prototype.sort\": [0.6, 0.8]\n \"bubble-sort-js\": [0.2, 0.7]\n \"merge-sort-js\": [0.65, 0.45]\n \"timsort\": [0.85, 0.25]\n \"fast-sort\": [0.75, 0.35]\n \"Our Target Product\": [0.75, 0.85]","Requirement Analysis":"该项目要求使用JavaScript实现一个快速排序算法,核心需求是对数字数组进行排序。无需任何UI界面,代码应尽量简单明了。快速排序是一种高效的分治排序算法,平均时间复杂度为O(n log n)。实现时需考虑:选取基准元素、分区操作、递归排序子数组,同时需处理空数组和单元素等边界情况。","Requirement Pool":[["P0","实现核心快速排序函数,能够对数字数组进行升序排序"],["P0","处理边界情况:空数组、单元素数组、已排序数组"],["P1","在代码中提供示例调用,通过console.log输出排序结果以便验证"],["P1","代码添加必要注释,说明算法步骤和逻辑"],["P2","支持可选的降序排序参数"]],"UI Design draft":"无UI设计需求。程序仅包含纯JavaScript逻辑代码,通过Node.js或浏览器控制台运行,使用console.log输出排序前后的数组结果进行验证。","Anything UNCLEAR":"目前需求较为明确。可进一步确认的点:1) 是否需要支持降序排序;2) 是否需要处理非数字元素的过滤;3) 运行环境是Node.js还是浏览器环境(不影响核心实现)。"}
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docs/requirement.txt
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docs/requirement.txt
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一个JS写的数字的快速排序程序,无需UI,尽量简单
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docs/system_design/20260326152929.json
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docs/system_design/20260326152929.json
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{"Implementation approach":"实现一个纯JavaScript的快速排序算法,无需任何第三方依赖库。采用经典的分治策略:选取基准元素(pivot),将数组分为小于、等于、大于基准的三个部分,递归排序后合并。同时支持升序/降序参数,处理边界情况(空数组、单元素数组),并通过console.log提供示例验证。代码结构简单,仅需两个文件:核心排序模块和入口示例文件。","File list":["index.js","quickSort.js"],"Data structures and interfaces":"\nclassDiagram\n class QuickSort {\n +quickSort(arr: number[], descending: boolean) number[]\n -partition(arr: number[], descending: boolean) object\n }\n class Main {\n +run() void\n }\n Main --> QuickSort : uses\n","Program call flow":"\nsequenceDiagram\n participant M as Main (index.js)\n participant QS as QuickSort (quickSort.js)\n\n M->>M: 定义测试数组 testArrays\n M->>QS: quickSort([], false)\n QS-->>M: 返回 []\n M->>M: console.log 输出空数组结果\n\n M->>QS: quickSort([42], false)\n QS-->>M: 返回 [42]\n M->>M: console.log 输出单元素结果\n\n M->>QS: quickSort([3,6,8,10,1,2,1], false)\n QS->>QS: 选取 pivot = arr[middle]\n QS->>QS: 分区为 left, middle, right\n QS->>QS: quickSort(left, false) 递归\n QS->>QS: quickSort(right, false) 递归\n QS-->>M: 返回升序排序结果\n M->>M: console.log 输出升序结果\n\n M->>QS: quickSort([3,6,8,10,1,2,1], true)\n QS->>QS: 选取 pivot = arr[middle]\n QS->>QS: 分区为 left(>pivot), middle, right(<pivot)\n QS->>QS: quickSort(left, true) 递归\n QS->>QS: quickSort(right, true) 递归\n QS-->>M: 返回降序排序结果\n M->>M: console.log 输出降序结果\n\n M->>QS: quickSort([1,2,3,4,5], false)\n QS-->>M: 返回已排序数组\n M->>M: console.log 输出已排序数组结果\n","Anything UNCLEAR":"1) 降序排序参数已作为可选功能(P2)纳入实现,默认为升序;2) 非数字元素过滤未在需求中明确要求,本实现假设输入均为数字数组;3) 运行环境兼容Node.js和浏览器,不影响核心逻辑。"}
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docs/task/20260326152929.json
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{"Required packages":["No third-party dependencies required"],"Required Other language third-party packages":["No third-party dependencies required"],"Logic Analysis":[["quickSort.js","包含 QuickSort 核心模块。实现 quickSort(arr: number[], descending: boolean) 公开方法:处理边界情况(空数组、单元素数组直接返回);选取中间元素作为 pivot;调用内部 partition 私有逻辑将数组分为 left(小于pivot)、middle(等于pivot)、right(大于pivot)三部分;根据 descending 参数决定升序或降序递归合并。无外部依赖,使用 module.exports 导出 quickSort 函数。"],["index.js","包含 Main 入口模块。实现 run() 函数:从 quickSort.js 导入 quickSort(require('./quickSort'));定义多组测试数组 testArrays,包括空数组、单元素数组、普通乱序数组、已排序数组;依次调用 quickSort 进行升序和降序排序,并通过 console.log 输出验证结果。依赖 quickSort.js,需在 quickSort.js 完成后实现。"]],"Task list":["quickSort.js","index.js"],"Full API spec":"","Shared Knowledge":"`quickSort.js` 是项目核心模块,导出唯一公共函数 `quickSort(arr, descending)`。参数说明:`arr` 为待排序的数字数组,`descending` 为布尔值(默认 false 表示升序,true 表示降序)。返回值为排序后的新数组,不修改原数组。边界情况处理:空数组和单元素数组直接返回原数组。`index.js` 通过 `require('./quickSort')` 引入该函数并执行示例验证。","Anything UNCLEAR":"1) 降序排序参数 `descending` 默认值为 false(升序),调用时可选传入 true 实现降序,已明确纳入实现;2) 本实现假设输入均为数字数组,不处理非数字元素过滤,若后续有混合类型输入需求需额外扩展;3) 代码兼容 Node.js 运行环境(使用 CommonJS module.exports/require),同时核心逻辑也可在浏览器环境中使用。"}
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quick_sort_js/index.js
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quick_sort_js/index.js
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## index.js
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/**
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* @fileoverview Main entry module for demonstrating the QuickSort algorithm.
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* Runs multiple test cases including edge cases and typical scenarios,
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* outputting results via console.log for verification.
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*
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* @module Main
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*/
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'use strict';
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const quickSort = require('./quickSort');
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/**
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* Runs all QuickSort demonstration test cases and logs results to console.
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* Tests include: empty array, single-element array, unsorted array (ascending
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* and descending), and an already-sorted array.
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*
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* @returns {void}
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*/
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function run() {
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/** @type {Array<{label: string, arr: number[]}>} */
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const testCases = [
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{ label: 'Empty array', arr: [] },
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{ label: 'Single element', arr: [42] },
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{ label: 'Unsorted array', arr: [3, 6, 8, 10, 1, 2, 1] },
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{ label: 'Already sorted array', arr: [1, 2, 3, 4, 5] },
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{ label: 'Reverse sorted array', arr: [9, 7, 5, 3, 1] },
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{ label: 'Array with duplicates', arr: [4, 2, 4, 1, 4, 3] },
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];
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console.log('========== QuickSort Algorithm Demo ==========\n');
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testCases.forEach(({ label, arr }) => {
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const originalArr = [...arr];
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// Ascending sort (default)
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const ascResult = quickSort(arr, false);
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console.log(`[${label}]`);
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console.log(` Input: [${originalArr.join(', ')}]`);
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console.log(` Ascending: [${ascResult.join(', ')}]`);
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// Descending sort
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const descResult = quickSort(arr, true);
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console.log(` Descending: [${descResult.join(', ')}]`);
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console.log();
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});
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console.log('========== Demo Complete ==========');
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}
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// Execute the main run function
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run();
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quick_sort_js/quickSort.js
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quick_sort_js/quickSort.js
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## quickSort.js
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/**
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* @fileoverview QuickSort core module implementing the classic divide-and-conquer
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* sorting algorithm with support for ascending and descending order.
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*
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* @module quickSort
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*/
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'use strict';
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/**
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* Partitions the array into three parts based on the pivot element.
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* The pivot is selected as the middle element of the array.
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*
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* @private
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* @param {number[]} arr - The array to partition.
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* @param {boolean} descending - If true, partition for descending order;
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* otherwise partition for ascending order.
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* @returns {{left: number[], middle: number[], right: number[]}} An object
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* containing three sub-arrays:
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* - left: elements less than pivot (ascending) or greater than pivot (descending)
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* - middle: elements equal to pivot
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* - right: elements greater than pivot (ascending) or less than pivot (descending)
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*/
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function partition(arr, descending) {
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const pivotIndex = Math.floor(arr.length / 2);
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const pivot = arr[pivotIndex];
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const left = [];
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const middle = [];
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const right = [];
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for (let i = 0; i < arr.length; i++) {
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const element = arr[i];
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if (descending) {
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// For descending order: left holds greater elements, right holds smaller elements
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if (element > pivot) {
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left.push(element);
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} else if (element === pivot) {
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middle.push(element);
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} else {
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right.push(element);
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}
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} else {
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// For ascending order: left holds smaller elements, right holds greater elements
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if (element < pivot) {
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left.push(element);
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} else if (element === pivot) {
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middle.push(element);
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} else {
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right.push(element);
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}
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}
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}
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return { left, middle, right };
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}
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/**
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* Sorts an array of numbers using the QuickSort algorithm.
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* Returns a new sorted array without modifying the original.
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*
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* @public
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* @param {number[]} arr - The array of numbers to sort.
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* @param {boolean} [descending=false] - If true, sorts in descending order;
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* if false (default), sorts in ascending order.
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* @returns {number[]} A new array containing the sorted elements.
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*
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* @example
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* // Ascending sort (default)
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* quickSort([3, 6, 8, 10, 1, 2, 1]);
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* // Returns: [1, 1, 2, 3, 6, 8, 10]
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*
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* @example
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* // Descending sort
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* quickSort([3, 6, 8, 10, 1, 2, 1], true);
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* // Returns: [10, 8, 6, 3, 2, 1, 1]
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*/
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function quickSort(arr, descending = false) {
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// Boundary case: empty array or single-element array, return directly
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if (!Array.isArray(arr) || arr.length <= 1) {
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return arr;
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}
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// Partition the array into left, middle, and right sub-arrays
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const { left, middle, right } = partition(arr, descending);
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// Recursively sort left and right sub-arrays, then concatenate with middle
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return [
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...quickSort(left, descending),
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...middle,
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...quickSort(right, descending),
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];
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}
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module.exports = quickSort;
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requirements.txt
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requirements.txt
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No third-party dependencies required
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resources/competitive_analysis/20260326152929.mmd
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resources/competitive_analysis/20260326152929.mmd
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quadrantChart
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title "排序库的简洁性与性能对比"
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x-axis "低性能" --> "高性能"
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y-axis "复杂" --> "简洁"
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quadrant-1 "理想选择"
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quadrant-2 "需要优化"
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quadrant-3 "不推荐"
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quadrant-4 "性能优先"
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"Lodash sortBy": [0.7, 0.4]
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"Array.prototype.sort": [0.6, 0.8]
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"bubble-sort-js": [0.2, 0.7]
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"merge-sort-js": [0.65, 0.45]
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"timsort": [0.85, 0.25]
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"fast-sort": [0.75, 0.35]
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"Our Target Product": [0.75, 0.85]
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resources/data_api_design/20260326152929.mmd
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resources/data_api_design/20260326152929.mmd
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classDiagram
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class QuickSort {
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+quickSort(arr: number[], descending: boolean) number[]
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-partition(arr: number[], descending: boolean) object
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}
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class Main {
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+run() void
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}
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Main --> QuickSort : uses
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resources/prd/20260326152929.md
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resources/prd/20260326152929.md
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## Language
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zh_cn
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## Programming Language
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JavaScript
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## Original Requirements
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一个JS写的数字的快速排序程序,无需UI,尽量简单
|
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## Project Name
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quick_sort_js
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## Product Goals
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- 实现简洁高效的快速排序算法
|
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- 代码易于理解和维护
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- 确保排序结果的正确性和性能
|
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## User Stories
|
||||
|
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- 作为开发者,我希望能够对任意数字数组进行快速排序
|
||||
- 作为开发者,我希望排序函数能够处理边界情况,如空数组或单元素数组
|
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- 作为开发者,我希望代码简洁易读,方便直接引用或修改
|
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- 作为开发者,我希望能够通过控制台输出验证排序结果
|
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## Competitive Analysis
|
||||
|
||||
- Lodash sortBy: 功能强大但库体积较大,适合复杂项目
|
||||
- Array.prototype.sort: 原生方法,简单易用,但排序算法不固定
|
||||
- bubble-sort-js: 冒泡排序实现,简单但性能较差
|
||||
- merge-sort-js: 归并排序实现,稳定但代码相对复杂
|
||||
- timsort: 高性能混合排序,功能强大但实现复杂
|
||||
- fast-sort: 功能丰富,支持多种排序方式,但依赖较多
|
||||
- 简单手写快速排序: 轻量、无依赖,代码简洁,适合学习和小型项目
|
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## Competitive Quadrant Chart
|
||||
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quadrantChart
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title "排序库的简洁性与性能对比"
|
||||
x-axis "低性能" --> "高性能"
|
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y-axis "复杂" --> "简洁"
|
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quadrant-1 "理想选择"
|
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quadrant-2 "需要优化"
|
||||
quadrant-3 "不推荐"
|
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quadrant-4 "性能优先"
|
||||
"Lodash sortBy": [0.7, 0.4]
|
||||
"Array.prototype.sort": [0.6, 0.8]
|
||||
"bubble-sort-js": [0.2, 0.7]
|
||||
"merge-sort-js": [0.65, 0.45]
|
||||
"timsort": [0.85, 0.25]
|
||||
"fast-sort": [0.75, 0.35]
|
||||
"Our Target Product": [0.75, 0.85]
|
||||
|
||||
## Requirement Analysis
|
||||
|
||||
该项目要求使用JavaScript实现一个快速排序算法,核心需求是对数字数组进行排序。无需任何UI界面,代码应尽量简单明了。快速排序是一种高效的分治排序算法,平均时间复杂度为O(n log n)。实现时需考虑:选取基准元素、分区操作、递归排序子数组,同时需处理空数组和单元素等边界情况。
|
||||
|
||||
## Requirement Pool
|
||||
|
||||
- ['P0', '实现核心快速排序函数,能够对数字数组进行升序排序']
|
||||
- ['P0', '处理边界情况:空数组、单元素数组、已排序数组']
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- ['P1', '在代码中提供示例调用,通过console.log输出排序结果以便验证']
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- ['P1', '代码添加必要注释,说明算法步骤和逻辑']
|
||||
- ['P2', '支持可选的降序排序参数']
|
||||
|
||||
## UI Design draft
|
||||
|
||||
无UI设计需求。程序仅包含纯JavaScript逻辑代码,通过Node.js或浏览器控制台运行,使用console.log输出排序前后的数组结果进行验证。
|
||||
|
||||
## Anything UNCLEAR
|
||||
|
||||
目前需求较为明确。可进一步确认的点:1) 是否需要支持降序排序;2) 是否需要处理非数字元素的过滤;3) 运行环境是Node.js还是浏览器环境(不影响核心实现)。
|
||||
|
||||
33
resources/seq_flow/20260326152929.mmd
Normal file
33
resources/seq_flow/20260326152929.mmd
Normal file
@@ -0,0 +1,33 @@
|
||||
|
||||
sequenceDiagram
|
||||
participant M as Main (index.js)
|
||||
participant QS as QuickSort (quickSort.js)
|
||||
|
||||
M->>M: 定义测试数组 testArrays
|
||||
M->>QS: quickSort([], false)
|
||||
QS-->>M: 返回 []
|
||||
M->>M: console.log 输出空数组结果
|
||||
|
||||
M->>QS: quickSort([42], false)
|
||||
QS-->>M: 返回 [42]
|
||||
M->>M: console.log 输出单元素结果
|
||||
|
||||
M->>QS: quickSort([3,6,8,10,1,2,1], false)
|
||||
QS->>QS: 选取 pivot = arr[middle]
|
||||
QS->>QS: 分区为 left, middle, right
|
||||
QS->>QS: quickSort(left, false) 递归
|
||||
QS->>QS: quickSort(right, false) 递归
|
||||
QS-->>M: 返回升序排序结果
|
||||
M->>M: console.log 输出升序结果
|
||||
|
||||
M->>QS: quickSort([3,6,8,10,1,2,1], true)
|
||||
QS->>QS: 选取 pivot = arr[middle]
|
||||
QS->>QS: 分区为 left(>pivot), middle, right(<pivot)
|
||||
QS->>QS: quickSort(left, true) 递归
|
||||
QS->>QS: quickSort(right, true) 递归
|
||||
QS-->>M: 返回降序排序结果
|
||||
M->>M: console.log 输出降序结果
|
||||
|
||||
M->>QS: quickSort([1,2,3,4,5], false)
|
||||
QS-->>M: 返回已排序数组
|
||||
M->>M: console.log 输出已排序数组结果
|
||||
64
resources/system_design/20260326152929.md
Normal file
64
resources/system_design/20260326152929.md
Normal file
@@ -0,0 +1,64 @@
|
||||
## Implementation approach
|
||||
|
||||
实现一个纯JavaScript的快速排序算法,无需任何第三方依赖库。采用经典的分治策略:选取基准元素(pivot),将数组分为小于、等于、大于基准的三个部分,递归排序后合并。同时支持升序/降序参数,处理边界情况(空数组、单元素数组),并通过console.log提供示例验证。代码结构简单,仅需两个文件:核心排序模块和入口示例文件。
|
||||
|
||||
## File list
|
||||
|
||||
- index.js
|
||||
- quickSort.js
|
||||
|
||||
## Data structures and interfaces
|
||||
|
||||
|
||||
classDiagram
|
||||
class QuickSort {
|
||||
+quickSort(arr: number[], descending: boolean) number[]
|
||||
-partition(arr: number[], descending: boolean) object
|
||||
}
|
||||
class Main {
|
||||
+run() void
|
||||
}
|
||||
Main --> QuickSort : uses
|
||||
|
||||
|
||||
## Program call flow
|
||||
|
||||
|
||||
sequenceDiagram
|
||||
participant M as Main (index.js)
|
||||
participant QS as QuickSort (quickSort.js)
|
||||
|
||||
M->>M: 定义测试数组 testArrays
|
||||
M->>QS: quickSort([], false)
|
||||
QS-->>M: 返回 []
|
||||
M->>M: console.log 输出空数组结果
|
||||
|
||||
M->>QS: quickSort([42], false)
|
||||
QS-->>M: 返回 [42]
|
||||
M->>M: console.log 输出单元素结果
|
||||
|
||||
M->>QS: quickSort([3,6,8,10,1,2,1], false)
|
||||
QS->>QS: 选取 pivot = arr[middle]
|
||||
QS->>QS: 分区为 left, middle, right
|
||||
QS->>QS: quickSort(left, false) 递归
|
||||
QS->>QS: quickSort(right, false) 递归
|
||||
QS-->>M: 返回升序排序结果
|
||||
M->>M: console.log 输出升序结果
|
||||
|
||||
M->>QS: quickSort([3,6,8,10,1,2,1], true)
|
||||
QS->>QS: 选取 pivot = arr[middle]
|
||||
QS->>QS: 分区为 left(>pivot), middle, right(<pivot)
|
||||
QS->>QS: quickSort(left, true) 递归
|
||||
QS->>QS: quickSort(right, true) 递归
|
||||
QS-->>M: 返回降序排序结果
|
||||
M->>M: console.log 输出降序结果
|
||||
|
||||
M->>QS: quickSort([1,2,3,4,5], false)
|
||||
QS-->>M: 返回已排序数组
|
||||
M->>M: console.log 输出已排序数组结果
|
||||
|
||||
|
||||
## Anything UNCLEAR
|
||||
|
||||
1) 降序排序参数已作为可选功能(P2)纳入实现,默认为升序;2) 非数字元素过滤未在需求中明确要求,本实现假设输入均为数字数组;3) 运行环境兼容Node.js和浏览器,不影响核心逻辑。
|
||||
|
||||
Reference in New Issue
Block a user