Re: regex

Jorge Almeida:
> Please help me to understand this:
> $ perl -e 'exit(10) if "aaa"=~/a{,2}/;'
> $ echo $?
> $ 10

In man perlre, under "Regular Expressions" it says:

  {,n}        Match at most n times

So /a{,2}/ matches "", "a", and "aa" and is ignorant about what 
comes before and after (basically). That "aa" is followed by a
"a" isn't something the expression prohibits. If you want that
try /^a{,2}$/ instead.

Regards,
/Karl Hammar