Re: Looking for a 3rd eye - perl errors

On 11/15/21 2:00 AM, Odhiambo Washington wrote:
> Hi everyone,

Hello.  :-)


> Looking for a 3rd eye here:
> 
> In the code below, I am getting these errors:

>      $$contref =~ s/^\w+:{1,1}?//gm;     <= Error: Useless use of greediness
> modifier '?' in regex; marked by <-- HERE in m/^\w+:{1,1}? <-- HERE


See 'perldoc perlretut' and "Matching repetitions".  You are using two 
quantifiers next to each other -- {1,1} and ? -- and Perl does not like 
that.


>        $uri =~ s/%{?([a-z]+)}?/$param{$1}/g;   <======Error: Unescaped left
> brace in regex is passed through in regex; marked by <-- HERE in m/%{ <--
> HERE ?([a-z]+)}?/


Again, see 'perldoc perlretut' and "Matching repetitions".  Braces are 
regular expression metacharacters.  If you want to match literal braces 
in your target string, you must escape them:

     \{ ... \}


When writing and/or posting Perl code with regular expressions, it is 
helpful to include example target strings and expected captures in the 
comments.


If you are serious about regular expressions, "Mastering Regular 
Expressions" by Jeffrey Friedl is very helpful:

     http://regex.info/book.html


David