[英]Affected days of time range with moment.js
I try to loop through two given date time.我尝试遍历两个给定的日期时间。 I have to make some calculation on each day of the range.
我必须对范围的每一天进行一些计算。 I made a JsBin to setup the problem.
我做了一个JsBin来设置问题。
const timeRange1 = ['2019-10-22 14:00:00', '2019-10-22 19:00:00']; const timeRange2 = ['2019-10-22 13:30:00', '2019-10-24 10:00:00']; const timeRange3 = ['2019-10-22 06:00:00', '2019-10-23 23:00:00']; const timeRange4 = ['2019-10-21 23:00:00', '2019-10-22 01:00:00']; function loop(range) { const rangeStart = moment(range[0]) const rangeEnd = moment(range[1]) let i = 0 for (let m = rangeStart; m.diff(rangeEnd, 'days') <= 0; m.add(1, 'days')) { i++ } return i } // Here you can see the expected values and the wrong results. console.log(loop(timeRange1)); // 1 - 2 console.log(loop(timeRange2)); // 3 - 3 console.log(loop(timeRange3)); // 2 - 3 console.log(loop(timeRange4)); // 2 - 2
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.min.js"></script>
This seems to come from the times.这似乎来自时代。 When the time part of the range end is higher than the one from the range start, adding a day does not make the diff lower than 0.
当范围结束的时间部分高于范围开始的时间部分时,添加一天不会使差异低于 0。
If you truncate them from your moment values, the results are what you expect (use .startOf('day')
)如果你从你的时刻值中截断它们,结果就是你所期望的(使用
.startOf('day')
)
function loop(range) {
const rangeStart = moment(range[0]).startOf('day')
const rangeEnd = moment(range[1]).startOf('day')
let i = 0
for (let m = rangeStart; m.diff(rangeEnd, 'days') <= 0; m.add(1, 'days')) {
i++
}
return i
}
The problem is that diff truncates to an integer, so the loop doesn't stop until the difference is at least 1 day.问题是diff被截断为 integer,因此循环在差异至少1 天之前不会停止。 Consider the first example:
考虑第一个例子:
1st iteration:第一次迭代:
2nd iteration:第二次迭代:
3rd iteration第三次迭代
The comparison needs to either:比较需要:
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