Majed Badawi
2020-11-28 19:06:01
你可以moment.js用来获取时间字符串的总和。
要按周对项目进行分组，可以使用.reduce。
最后，要按排序项目Week，请使用.sort：
let array = [
{Course: "Design", Hours: "01:00:00", Week: "1"},
{Course: "Design", Hours: "01:00:00", Week: "3"},
{Course: "Design", Hours: "01:00:00", Week: "2"},
{Course: "Design", Hours: "01:00:00", Week: "1"},
{Course: "Design", Hours: "01:00:00", Week: "2"}
];
const addTwoTimeStrs = (a, b) => {
let sum = moment.duration(a).add(moment.duration(b));
sum = moment.utc(sum.asMilliseconds()).format("HH:mm:ss");
return sum;
}
const arr = Object.values(
array.reduce((acc,item) => {
const { Hours: hours, Week: week } = item;
const weekItem = acc[week];
acc[week] = weekItem
? { ...weekItem, Hours: addTwoTimeStrs(weekItem.Hours,hours) }
: item;
return acc;
}, {})
);
const res = arr.sort((a,b) => Number(a.Week) - Number(b.Week));
console.log(res.map(e => e.Hours));<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js" integrity="sha512-qTXRIMyZIFb8iQcfjXWCO8+M5Tbc38Qi5WzdPOYZHIlZpzBHG3L3by84BBBOiRGiEb7KKtAOAs5qYdUiZiQNNQ==" crossorigin="anonymous"></script>热门帖子
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谢谢你。如果我只想要一个小时数的数组，需要做哪些更改？像这样：让小时= [02：00：00、02：00：00、01：00：00]？
@egx，不客气。如果解决了问题，请投票并把答案标记为解决方案。关于您的问题，您可以使用
.map以下方法：res.map(e => e.Hours)我将其标记为“原因已解决”，但它似乎可以与该地图一起使用。当我console.log（）res时，我仍然得到一个对象数组。我只需要一个带有Hours值的数组。
@egx答案已更新