Re: how to run regex calculation

This isnt really the forum for random perl help, i suggest Perlmonks instead.

$str=~/(\d+)\s(\d+)\s(\1*\2)/

$1 refers to the capture buffers from the last completed match, \1
inside of the pattern part of a regex refers to the capture buffer of
the currently matching regex.

Yves

On Thu, 9 Jan 2020 at 03:36, Wesley Peng <[email protected]> wrote:
>
> Hello
>
> Give the case I have a string,
>
> $str = "2 3 6";
>
> I want to match with:
>
> true if $str =~ /(\d+)\s(\d+)\s($1*$2)/;
>
> that's to say, the thrid column would be (firstCol * SecondCol).
>
> How to write regex for this?
>
> Thank you.



-- 
perl -Mre=debug -e "/just|another|perl|hacker/"