使用 JavaScript 从 2 个值和键数组构建 Map
javascriptweb developmentfront end technologyobject oriented programming
假设我们有两个数组 −
const keys = [0, 4, 2, 3, 1]; const values = ["first", "second", "third", "fourth", "fifth"];
我们需要编写一个 JavaScript 函数,该函数接收键和值数组并将值映射到相应的键。输出应为 −
const map = { 0 => 'first', 4 => 'second', 2 => 'third', 3 => 'fourth', 1 => 'fifth' };
示例
以下是代码 −
const keys = [0, 4, 2, 3, 1]; const values = ["first", "second", "third", "fourth", "fifth"]; const buildMap = (keys, values) => { const map = new Map(); for(let i = 0; i < keys.length; i++){ map.set(keys[i], values[i]); }; return map; }; console.log(buildMap(keys, values));
输出
这将在控制台中产生以下输出 −
Map(5) { 0 => 'first', 4 => 'second', 2 => 'third', 3 => 'fourth', 1 => 'fifth' }