从Kotlin中的输入流初始化数组 [英] Initializing Array from input stream in Kotlin

问题描述

我想从输入流中读取下一个n整数到IntArray中.

I would like to read the next n integer from the input stream into an IntArray.

我写了下面的代码，但是正如我们在 Kotlin阵列初始化中的初始化调用顺序 无法保证初始化将从索引0开始并一一进行.

I wrote the code below but as we discussed in Order of init calls in Kotlin Array initialization there is no guarantee that the initialization would start from index 0 and go one by one.

是否有一些类似的优雅解决方案，它不是基于这种可能错误的假设(而是在所有已知实现中的另一线程中讨论的假设)?

Is there some similarly elegant solution for this which is not based on this possibly false (but as discussed in the other thread in all known implementations true) assumption?

fun Scanner.readIntArray(n: Int): IntArray {
    return IntArray(n){nextInt()}
}

推荐答案

您总是可以自己遍历索引以保证所需的行为.

You could always iterate over the indices yourself to guarantee the behavior you want.

fun Scanner.readIntArray(n: Int) = IntArray(n).apply {
    for (i in 0 until size) {
        this[i] = nextInt()
    }
}

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