通过 JavaScript 计算季度和年度平均值
javascriptweb developmentfront end technologyobject oriented programming更新于 2026/1/24 3:24:17
假设我们有一个像这样的数字数组 −
const arr = [1,2,2,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20];
我们需要编写一个 JavaScript 函数，该函数接受一个这样的数组，并将该数组按季度和年度分组。
上述数组的组应类似于 −
const quarterly = [[1,2,2],[4,5,6],[7,8,9],[10,11,12],[13,14,15],[16,17,18],[19,20]]; const annual = [[1,2,2,4,5,6,7,8,9,10,11,12],[13,14,15,16,17,18,19,20]];
然后，该函数应计算特定季度和年份的平均值，然后返回平均数组。
示例
其代码为 −
const arr = [1,2,2,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20];
const findAverages = arr => {
const quarterLength = 3, yearLength = 12;
const sumOfGroup = (arr, num) => {
return arr.reduce((acc, val, ind) => {
if (ind % num === 0){
acc.push(0);
};
acc[acc.length - 1] += val;
return acc;
}, []);
};
const quarters = sumOfGroup(arr, quarterLength);
const years = sumOfGroup(arr, yearLength);
return {
"yearlyAverage": years,
"quarterlyAverage": quarters
};
};
console.log(findAverages(arr));
输出
控制台中的输出 −
{
yearlyAverage: [ 77, 132 ],
quarterlyAverage: [
5, 15, 24, 33,
42, 51, 39
]
}
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有用资源
javascript 参考教程 - 该教程包含有关 javascript 的更多信息:https://www.cainiaomax.com/javascript/
