请问数组清空后，作用域会变化吗？

在 Perl in 20 pages 看到了这么一段话，有多了一些疑问

A scalar variable that has a valid string or numeric value, such as 4.3 or "hello" or even "" (the empty
string), is defined. In contrast, if a variable without a valid value is undefined. The builtin value undef
represents this undefined value, much like NULL in C/C++, null in Java or nil in Lisp/Ada are undefined
values. An array is defined if has previously held data. The empty array () is undefined; all other array
values are considered defined. Use the defined() function to test if a variable is defined.

没看内容，标题的答案是：不会。
如果你碰到什么问题，请检查下自己的程序，别往这个方向联想了。