访问向量数组麻烦 [英] Accessing an array of vectors trouble

问题描述

我的代码如下所示:

a = IO.readlines("input.txt").map { |line| Vector.[](line.split) }

现在我想访问我的 a 数组中第一个向量的单个组件.我正在编写以下内容来解决向量:

Now I want to access a single component of the first vector within my a array. I'm writing the following to address a vector:

puts a[0]

这种行为非常符合预期 - 我收到以下信息:

The behavior is pretty much expected - I receive the following:

Vector[1.2357, 2.1742, -5.4834, -2.0735]

现在让我们尝试以这种方式处理单个组件:

Now let's try to address a single component this way:

puts a[0][0]

瞧，我收到了所有矢量组件的列表，例如:

and voila, I receive a list of all the vector components,like:

1.2357
2.1742
-5.4834
-2.0735

怎么会?也许最后一次尝试是错误的?如何正确寻址数组中向量内的标量?

How come? Maybe the last attempt was wrong? How do I correctly address a scalar inside a vector within an array?

推荐答案

由于你的代码，我认为数组构造应该是:

Due to your code I think the array construction should be:

a = IO.readlines("input.txt").map { |line| Vector[*line.split] }

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