为什么Perl变量需要以$，％，@(信号)开头? [英] Why do Perl variables need to start with $, %,@ (sigils)?

问题描述

为什么Perl变量需要以不同的字符(字母)开头?

Why do Perl variables need to start with different characters (sigils)?

• 标量变量以$

哈希以%

数组以@

他们为什么会这样?

推荐答案

当我开始使用Perl时，向我说明选择了这些字符是因为:

When I started out using Perl it was explained to me that these characters were chosen because:

• $看起来有点像's'，所以用于 s 量，
• @的中间有一个"a"，因此用于 a rrays，并且
• %是用于散列的，因为它看起来像是键值对除以斜杠.

• $ looked a bit like an 's' so that was for scalars,
• @ has an 'a' in the middle so that was for arrays, and
• % was for hashes because it looked like a key-value pair divided by a slash.

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