regexp: s/// vs s"""

[Anonymous Monk]

Dear Monks,

Maybe I missed it, but it looks like it that something like this

s"(^\\)#.*"$1" ;

is not mentioned in the documentation. So what is the difference between this example and s/(^\\)#.*/$1/ ?
Thanks
perlnoob

Edit: g0n - code tags

[merlyn]

From perlop:

               If "/" is the delimiter then the initial "m" is optiona
+l.  With
               the "m" you can use any pair of non-alphanumeric, non-w
+hite-
               space characters as delimiters.  This is particularly u
+seful
               for matching path names that contain "/", to avoid LTS 
+(leaning
               toothpick syndrome).  If "?" is the delimiter, then the
+ match-
               only-once rule of "?PATTERN?" applies.  If "'" is the d
+elim-
               iter, no interpolation is performed on the PATTERN.
...
               If the delimiter chosen is a single quote, no interpola
+tion is
               done on either the PATTERN or the REPLACEMENT.  Otherwi
+se, if
               the PATTERN contains a $ that looks like a variable rat
+her than
               an end-of-string test, the variable will be interpolate
+d into
               the pattern at run-time.  If you want the pattern compi
+led only
               once the first time the variable is interpolated, use t
+he "/o"
               option.  If the pattern evaluates to the empty string, 
+the last
               successfully executed regular expression is used instea
+d.  See
               perlre for further explanation on these.  See perllocal
+e for
               discussion of additional considerations that apply when
+ "use
               locale" is in effect.

[Corion]

See the discussion of the quote and quote-like operators in perldoc perlop. s/// and s""" are equivalent.

[inman]

The first character following the s is used as a delimiter. If the character is normally paired, a matching pair is used.

s/match/replace/;  #The conventional way
s|match|replace|;  #Useful for urls that contain /s
s(match)(replace); #matched braces

This gives you some flexibility with respect to the code that you are working with. Take care when using characters that are also used in regex notation.

[CountOrlok]

from perlop:

If "/" is the delimiter then the initial m is optional. With the m you can use any pair of non-alphanumeric, non-whitespace characters as delimiters. This is particularly useful for matching path names that contain "/", to avoid LTS (leaning toothpick syndrome). If "?" is the delimiter, then the match-only-once rule of ?PATTERN? applies. If "'" is the delimiter, no interpolation is performed on the PATTERN.

-imran