给定长度值length，把列表切分成每段长度为length的N段列表，Kotlin

import kotlin.random.Randomfun main(args: Array<String>) {var source = mutableListOf<String>()val end = Random.nextInt(30) + 1for (i in 0 until end) {source.add(i.toString())}println(source)val length = Random.nextInt(source.size) + 1var segment = source.size / lengthif (source.size % length != 0) {segment++}println("总长度:${source.size} 随机生成每段长度:$length 算出段数:$segment ")var fromIndex = 0var toIndex = 0for (i in 0 until segment) {fromIndex = i * lengthtoIndex = Math.min(fromIndex + length, source.size)println(source.subList(fromIndex, toIndex))}
}

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21]
总长度:22 随机生成每段长度:4 算出段数:6 
[0, 1, 2, 3]
[4, 5, 6, 7]
[8, 9, 10, 11]
[12, 13, 14, 15]
[16, 17, 18, 19]
[20, 21]

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