Re: in the elemetns of programming perl , I need help with 2 lines that I don't understand

[Rob Dixon]

Dr.Ruud wrote:
> Richard Lee schreef:
> 
>> $pattern = '.*(?:' . join('|', @ARGV) . ')';
> 
> Safer:
> 
>   $pattern = '.*(?:' . join('|', map quotemeta, @ARGV) . ')';
> 
> And I would do a qr() on top of that. 

How? And why?

Rob

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