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?

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, @_.

2010年12月30日 · 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. …

2020年11月23日 · 骆驼书Learning Perl 《Learning Perl》骆驼书，全书加附录一共363页，很多对不对。买到书后我是如何翻这363页快速翻到Perl入门级？ 我的答案是:不用每页都细读， 快速翻看目录找 …

I'm working on a Perl script. How can I parse command line parameters given to it? Example: script.pl "string1" "string2"

2012年9月5日 · @pst, <> is not a file handle, "null" or otherwise. It's an operator. Specifically, the readline operator. There's a reference to it as the "angle operator" in perlvar, although there isn't …

2019年11月10日 · 53 From Perl documentation: OR List operators On the right side of a list operator, it has very low precedence, such that it controls all comma-separated expressions found there.

In Perl, the operator s/ is used to replace parts of a string. Now s/ will alter its parameter (the string) in place. I would however like to replace parts of a string befor printing it, as in pri...

The outer part is a dereference - this implies is a reference to an array, so this operator deferences it to refer to the array directly, which is then copied to Chapter 8 of the ' Camel Book ' is a good place to …

2013年6月17日 · I am writing Perl classes to remove redundancies from scripts and since Perl has a lot of ways to make classes I keep having trouble making the classes properly. So does anyone have a …