Add time-segment

Author: ScoutYin

solutions/other/time-segment.md

@@ -0,0 +1,47 @@
+### 时间分段
+
+指定格式为`06:30`或`6:30`的时间起点和终点，以及每个时间段的长度（分钟），得到一个划分好的的数组
+
+```javascript
+const timeSegment = (start, end, step) => {
+	const res = []
+	const zeroFill = (num) => {
+		return num < 10 ? `0${num}` : `${num}`
+	}
+	const _segment = (start, end, step) => {
+		let arr = start.split(':').concat(end.split(':'))
+		arr = arr.map(item => parseInt(item))
+		let temp = arr[1] + step
+		let tempHour = Math.floor(temp / 60)
+		let tempMis = temp % 60
+		let hour = tempHour + arr[0]
+		if (arr[0] > arr[2] || arr[0] === arr[2] && arr[1] >= arr[3]) {
+			if (hour >= 24) {
+				hour -= 24
+			}
+		} else {
+			if (hour > arr[2] || arr[2] === hour && tempMis > arr[3]) {
+				res.push(`${start}-${end}`)
+				return res
+			}
+		}
+		let minute = zeroFill(tempMis)
+		hour = zeroFill(hour)
+		let resEnd = `${hour}:${minute}`
+		res.push(`${start}-${resEnd}`)
+		return resEnd === end ? res : _segment(resEnd, end, step)
+	}
+	_segment(start, end, step)
+	return res
+}
+
+// test case 1
+const result1 = timeSegment('08:30', '09:00', 45)
+console.log('result1', result1)
+// test case 2
+const result2 = timeSegment('06:30', '06:30', 45)
+console.log('result2', result2)
+// test case 3
+const result3 = timeSegment('06:30', '06:00', 45)
+console.log('result3', result3)
+```