Re: Understanding this particular Regex.

The "+" matches "the previous item" one or more times.

In this case, "the previous item" is a digit [0-9].

So, at least ONE digit is required, but more digits, if present, are acceptable and will match.

In your example of a solitary "4", the "+" does NOT match anything beyond that digit.

The subsequent " *" matches zero or more trailing spaces. See "Quantifiers" in perldoc perlre.

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Comment on Re: Understanding this particular Regex.

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Re^2: Understanding this particular Regex. by tty1x (Novice) on May 05, 2013 at 07:33 UTC
Ahh thanks alot for the explanation. Guess my understanding of the `+` quantifier isn't that great .	[reply] [d/l]