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operators - What does =~ do in Perl? - Stack Overflow
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?

What is the meaning of @_ in Perl? - Stack Overflow
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. More details can be found in perldoc perlsub (Perl subroutines) linked from the perlvar: Any arguments passed in show up in the array @_ .

syntax - What are the differences between $, @, % in a Perl variable ...
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, @_.

What's the use of <> in Perl? - Stack Overflow
@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 actually any such operator. The angle brackets are used by two operators: readline or glob. The operator depends on the contents of the brackets.

operators - What is the difference between "||" and "or" in Perl ...
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.

[办公编程]Python不算啥，我已经有更好的选择——Perl (一文快速入门，附详细举例)
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， 快速翻看目录找共同点和重点来看。我学习新语言的方式是找以往编程语言入门 共同点 和 重点，比如 基础变量， 控制循环，构建函数 共同 ...

Perl flags -pe, -pi, -p, -w, -d, -i, -t? - Stack Overflow
Below are the flags that I encounter most often, and I don't have a clue what they mean: perl -pe perl -pi perl -p perl -w perl -d perl -i perl -t I will be very grateful if you tell me what each of those mean and some use cases for them, or at least tell me a way of finding out their meaning.

What does the -> arrow do in Perl? - Stack Overflow
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 learn about references, or the perlref section of the Perl documentation. The arrow operator is an object dereference, in this case fetching the member of the object. Similarly, later ...

How does double arrow (=>) operator work in Perl? - Stack Overflow
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 => 28 which would be the same as 'Martin', 28. You can make a hash from any even-length list, which is all you're doing in your example. Your Readonly example is taking advantage of Perl's flexibility with ...

Perl 是一门冷门的语言吗，关注者和问题数这么少？ - 知乎
Perl 是一门冷门的语言吗，关注者和问题数这么少？ 我想学正则，有几个人都推荐了 perl ，说它是为了文本处理而生。 但 perl 话题的关注者不到 5000人，问题数不到 300 ，这是由于 perl… 显示全部 关注者 30 被浏览