Here the sigil changes to $ to denote that you are accessing a scalar, however the trailing [0] tells perl that it is accessing a scalar element of the array in _ or in other words, @_.

Dec 30, 2010 · 128 perldoc perlvar is the first place to check for any special-named Perl variable info. Quoting: @_: Within a subroutine the array @_ contains the parameters passed to that subroutine. …

51 I guess the tag is a variable, and it is checking for 9eaf - but does this exist in Perl? What is the "=~" sign doing here and what are the "/" characters before and after 9eaf doing?

7 Perl arrow operator has one other use: Class−>method invokes subroutine method in package Class though it's completely different than your code sample. Only including it for completeness for the …

Sep 5, 2012 · What's the use of <> in Perl. How to use it ? If we simply write <>; and while (<>) what is that the program doing in both cases?

没前途，而且现在不能叫Perl了，叫raku，逐渐没人用死亡。 Perl5在一堆Linux和unix跟 awk 之流因为是预装所以养活着，说明Perl5还是战胜Perl6，不像Python3战胜Python2。

25 =~ is the Perl binding operator. It's generally used to apply a regular expression to a string; for instance, to test if a string matches a pattern:

Feb 2, 2016 · The => operator in perl is basically the same as comma. The only difference is that if there's an unquoted word on the left, it's treated like a quoted word. So you could have written Martin …

注：笔者主要使用Perl做软件测试方面开发 按照笔者自己的经历，从对Perl一无所知到可以上手干活，可以从小骆驼书—— Learning Perl (豆瓣) 开始。快速浏览加实践下书上代码，两天就可以读个大概。 …

Nov 23, 2020 · 2.1 Perl变量 要赋值，就要先了解Perl的变量，当我了解这部分的时候挺惊讶于变量的设计思路，Perl所有数字的内部变量都是双精度浮点数（double-precision floating-point）有过其他编 …