在Perl中，如何使用字符串作为变量名? [英] In Perl, how can I use a string as a variable name?

问题描述

可能重复:
如何将变量用作在Perl中使用变量名?

Possible Duplicate:
How can I use a variable as a variable name in Perl?

这可行吗?我需要将字符串更改为变量.

Is this doable? I need to change a string into variable.

示例:

如果我有这样的变量:

$this_is_test = "what ever";
$default = "this";
$default = $default . "_is_test";

我希望$default取$this_is_test的值.

推荐答案

沿着

Along the lines of my other answer, whenever you find yourself adding string suffixes to a variable name, use a hash instead:

my %this = (
    is_test => "whatever",
    is_real => "whereever",
);

my $default = $this{is_test};

print "$default\n";

请勿不要使用符号引用，因为它们是不必要的，并且在您的问题中可能非常有害.有关更多信息，请参见为什么将变量用作变量名"是愚蠢的?，第2部分和第3部分，由 mjd .

Do NOT use symbolic references for this purpose because they are unnecessary and likely very harmful in the context of your question. For more information, see Why it's stupid to 'use a variable as a variable name'?, part 2 and part 3 by mjd.

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