René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"腾讯：数组扁平化、去重、排序","articleBody":"关于 `Array` 的属性、方法这里不再做介绍，详看 [MDN Array](https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Array) 。\r\n\r\n面试题：\r\n\r\n\u003e  已知如下数组：var arr = [ [1, 2, 2], [3, 4, 5, 5], [6, 7, 8, 9, [11, 12, [12, 13, [14] ] ] ], 10];\r\n\u003e\r\n\u003e  编写一个程序将数组扁平化去并除其中重复部分数据，最终得到一个升序且不重复的数组\r\n\r\n答案：\r\n\r\n```js\r\n// 扁平化\r\nconst flattenDeep = (array) =\u003e array.flat(Infinity)\r\n\r\n// 去重\r\nconst unique = (array) =\u003e Array.from(new Set(array))\r\n\r\n// 排序\r\nconst sort = (array) =\u003e array.sort((a, b) =\u003e a-b)\r\n\r\n// 函数组合\r\nconst compose = (...fns) =\u003e (initValue) =\u003e fns.reduceRight((y, fn) =\u003e fn(y), initValue)\r\n\r\n// 组合后函数\r\nconst flatten_unique_sort = compose( sort, unique, flattenDeep)\r\n\r\n// 测试\r\nvar arr = [ [1, 2, 2], [3, 4, 5, 5], [6, 7, 8, 9, [11, 12, [12, 13, [14] ] ] ], 10]\r\nconsole.log(flatten_unique_sort(arr))\r\n// [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]\r\n```\r\n\r\n可结合 [携程\u0026蘑菇街\u0026bilibili：手写数组去重、扁平化函数](https://github.com/sisterAn/JavaScript-Algorithms/issues/30) 查看","author":{"url":"https://github.com/sisterAn","@type":"Person","name":"sisterAn"},"datePublished":"2020-04-03T04:03:05.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":24},"url":"https://github.com/5/JavaScript-Algorithms/issues/5"}