Re^4: Getting only the link in a line

1.That's a very detailed explanation.but one question,why should we make "." a non-special character?even without it I am able to remove the "." 2.i understand what \S+? does but fail to understand how it removes the terminal period?

Comment on Re^4: Getting only the link in a line

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Re^5: Getting only the link in a line by kcott (Archbishop) on Nov 04, 2010 at 06:40 UTC
When you want to match a '.' exactly, you need to remove the special meaning. `[.]` is one way, `\.` is another. Here's what happens if you don't remove the special meaning and the URL doesn't have a trailing '.': `$ perl -wE 'while (<>) { my ($x) = $_ =~ /(https?:\S+?).?\s/; say $x; +}' Bug found in the build. Please check check https://web.com/fluent/x/JI +OUAQ for more details. https://web.com/fluent/x/JIOUA` [download] In this instance it matches any character; there's no '.' so it matches the 'Q' which you can see has been removed in the output. The `\S+?` does not remove the '.', it captures up to the '.'. I've been saying any character throughout - it actually doesn't match a newline unless you use the 's' modifier - see Modifiers in perlre. -- Ken	[reply] [d/l] [select]
Re^6: Getting only the link in a line by Anonymous Monk on Nov 04, 2010 at 07:54 UTC
ah..got it ,so .? captures "." if it is present but doesnt print ,right? >/p>	[reply]