Perl哈希排序问题 [英] Problem with Perl hash sorting

问题描述

我是一名新手perl程序员，我试图通过散列中的值对哈希进行排序，我遇到了问题。我以前做过这个，但这次出了问题，我不知所措。


我正在读一个带有while语句的大文件，每行都有一堆信息。我在空白处使用split，只保留我需要的信息。这里很容易。我要保留的是车站号码，车站名称，经度，纬度和车站年龄。这是代码的简化版本，但实际上我正在读取一个包含20列而不是4列的文件：

I am a novice perl programmer, and I am trying to sort a hash by a value in the hash and I am having problems. I''ve done this before, but this time something is going wrong and I''m at a loss.

I''m reading in a large file with a while statement, with each line having a bunch of information. I use split on the whitespace and keep only the information I need. Pretty easy through here. What I''m keeping is a station number, station name, longitude, latitude, and station age. This is a simplified version of the code, but in reality I''m reading in a file with 20 columns, not 4:

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推荐答案

问候Dave，


首先，在哈希分配中，您为每个哈希赋予相同的值

Greetings Dave,

First off, in your hash assignments you are giving each hash the same value "

name"，而不是它们的相应值。其次，您目前只按键进行排序，而不是按键对应的值。


无论如何，我建议您更改脚本的一些事项。但是，我只会告诉你，而不是建议你。

name", instead of their corresponding values. Secondly, you''re currently only sorting by the keys instead of the values corresponding to the keys.

Anyway, there are a few things that I would advise you to change about your script. However, instead of advising you, I''ll just show you.

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谢谢！我试试看。我的代码通常非常难看。

Thanks! I''ll give this a try. My code is typically very ugly.

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