Re^2: Difference between $1 and \1. (perldoc -v)

> perldoc -v $1

before people start complaining, this doesn't work with 5.10!š

-v Describes search for the item in detail (verbosely).

And when using Linux, better care about hiding $1 from bash-expansion.

perldoc -v '$1'

Cheers Rolf

š) ~~dunno when it was introduced...~~

UPDATE:

Up to 3.14_05, the switch -v was used to produce verbose messages 
of perldoc operation, which is now enabled by -D.
[download]

ehm 3?

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Re^3: Difference between $1 and \1. (perldoc -v) by rbala (Acolyte) on Dec 27, 2012 at 14:08 UTC
Thanks all! From your replies I understand that $1 , $2 type of variables will not contain any value or contain only, old match values of first or second paranthesis from any previous regex matching , unless the pattern matching is complete and if that matching is successful. Opposed to this is \1 which stores first paranthesis value even before the entire pattern is matched , so that it has a defined value in the matching pattern itself and hence provides expected results. Hope my understanding is correct. Correct me if any concerns for you...!!!	[reply]
Re^4: Difference between $1 and \1. (perldoc -v) by Anonymous Monk on Dec 27, 2012 at 14:11 UTC
correct!	[reply]