Re: What is the mean of the following syntax?

On 8/3/22, armando perez pena <[email protected]> wrote:
> Hello William,
>
> Perl is a programming language easy to use an relative easy to learn. But is
> very very tricky.
>
> The best way to learn is get a good book . Like 'Learning Perl' and read the
> book and practice.
>
> If you do not do that you will find a huge amount of special variables with
> stranges characters. Even google can't answer the meaning of these variables
> sometimes.
>
> So my more safety and sincere advice is to start with a book. If it is too
> much for you now. Then go for Perl tutorials in Perl documentation. Start
> with perl intro for example.
>
> !~ /\*/
>
> !~ mean negation, opposite to =~
>
> // Are the delimiter for regural espresion
>
> \ mean scape character. Here * has a meaning in regular expression world. So
> use \* meant use directly * character.
>
> All together. The if is true only if $extesinbdoes not contain *.
>
> Best Regards,
> Armando Pérez Peña
>
>
>
>
>
>
>
>
> ________________________________
> De: William Torrez Corea <[email protected]>
> Enviado: miércoles, 3 de agosto de 2022 8:41
> Para: [email protected] <[email protected]>
> Asunto: What is the mean of the following syntax?
>
> Mean: !~ /\*/
>
> I have the following code:
>
> if ($extension !~ /\*/) {
> $backup = $ARGV . $extension;
> }
>
>
> --
>
> With kindest regards, William.
>
> ⢀⣴⠾⠻⢶⣦⠀
> ⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system
> ⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org
> ⠈⠳⣄⠀⠀⠀⠀
>
>


-- 

With kindest regards, William.

⢀⣴⠾⠻⢶⣦⠀
⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system
⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org
⠈⠳⣄⠀⠀⠀⠀

This example was get of the book Beginning Perl - Curtis "Ovid" Poe

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