如何读回Data :: Dumper的输出? [英] How do I read back in the output of Data::Dumper?

问题描述

假设我有一个使用 Data::Dumper 创建的文本文件，的行:

Let's say I have a text file created using Data::Dumper, along the lines of:

my $x = [ { foo => 'bar', asdf => undef }, 0, -4, [ [] ] ];

我想重新读回该文件并重新获得$x.我试过了:

I'd like to read that file back in and get $x back. I tried this:

my $vars;
{
  undef $/;
  $vars = <FILE>;
}

eval $vars;

但是它似乎不起作用-$x不仅没有定义，当我尝试使用它时，我得到警告，提示

But it didn't seem to work -- $x not only isn't defined, when I try to use it I get a warning that

全局符号$ x需要明确的软件包名称.

Global symbol $x requires explicit package name.

什么是正确的方法? (是的，我知道这很丑陋.这是一个快速的实用程序脚本，而不是例如生命支持系统.)

What's the right way to do this? (And yes, I know it's ugly. It's a quick utility script, not e.g., a life-support system.)

推荐答案

以下是提供了两个不同选项的线程: 取消转储

Here's a thread that provides a couple different options: Undumper

如果您只是在寻找数据持久性，那么Storable模块可能是您的最佳选择.

If you're just looking for data persistence the Storable module might be your best bet.

这篇关于如何读回Data :: Dumper的输出?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！