PERL Beginners - Re: grep mystery / What happened to my @ sign ?

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Re: grep mystery / What happened to my @ sign ?

John W. Krahn

2005-11-23, 6:56 pm

Jay Savage wrote:
> On 11/23/05, Jeremy Kister <perl-01@jeremykister.com> wrote:
>
> You want to be careful with your classes here. '@' is not a
> metacharacter inside a class ([]), so '\@' matches both a literal ''
> and '@'

Matches are interpolated as double quoted strings so you have to escape '@' if
it will be interpolated as an array.

$ perl -le'@. = @x = "A" .. "D"; print for qr/[@x]/, qr/[\@x]/, qr/[@.]/'
(?-xism:[A B C D])
(?-xism:[\@x])
(?-xism:[@.])

John
--
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