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Commit 3b5be09

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feat: add flat function
1 parent 6bdf0df commit 3b5be09

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2 files changed

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‎js/flat.js‎

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/**
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*
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* @param {*} array 深层嵌套的数据
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* @returns array 新数组
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*/
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const flat1 = (array) => {
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return array.reduce((result, it) => {
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return result.concat(Array.isArray(it) ? flat1(it) : it);
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}, []);
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};
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let arr1 = [1, [2, 3, 4], [5, [6, [7, [8]]]]];
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console.log(flat1(arr1));
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// js原生的flat方法
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/**
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*
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* @param {*} array 深层嵌套的数据
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* @returns 新数组
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*/
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const flat2 = (array) => {
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return array.flat(Infinity);
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};
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let arr2 = [1, [2, 3, 4], [5, [6, [7, [8]]]]];
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console.log(flat2(arr2));
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const flat3 = (array) => {
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const result = [];
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const stack = [...array];
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while (stack.length !== 0) {
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const val = stack.pop();
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if (Array.isArray(val)) {
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stack.push(...val);
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} else {
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result.unshift(val);
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}
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}
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return result;
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};
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let arr3 = [1, [2, 3, 4], [5, [6, [7, [8]]]]];
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console.log(flat3(arr3));

‎leetcode/greedy_algorithm/jump_game‎

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