Re^3: regexp - replace spaces in quoted string

s/(".*?")/($x=$1)=~y: :_:, $x/ge)

[CUT]

  =~y: :_:,                '=~y: :_:, '
----------------------------------------------------------------------
  $                        before an optional \n, and the end of the
                           string
----------------------------------------------------------------------
  x/ge                     'x/ge'
[download]

Hm... Is it good explanation??
I'll try in my poor english:

s/(".*?")/($x=$1)=~y: :_:, $x/ge)
^^^^^^^^^1
          ^^^^^^^2
                  ^^^^^^^3
                          ^^4
                             ^^^5
[download]

1) take ALL between " and "
2) So you have ALL in $1. $1 is read only, so copy $1 to $x. And now, for one moment forget about all and work only on $x (this is thanx /e which "wraps an eval{...} around the replacement string and the evaluated result is substituted for the matched substring".
3)in $x replace all ' ' to '_'
4)put replaced $x into first s/from/to/
5)g - works globaly; e - eval the replacment string

greets
Uksza

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Re^4: regexp - replace spaces in quoted string by planetscape (Chancellor) on Sep 06, 2005 at 12:11 UTC
While the explanation provided by YAPE::Regex::Explain will probably be inferior to that which a human well-versed in regexps could produce, the advantage in using the module is that an explanation can be produced without having access to the well-versed human. It is available to anyone with access to CPAN, and therefore can be quite useful to the learner. :-) planetscape	[reply]
Re^5: regexp - replace spaces in quoted string by japhy (Canon) on Sep 06, 2005 at 13:49 UTC
Um, you mis-used my module. Only the LEFT-HAND side of a s/// is a regex; therefore, only the left-hand side should be sent through YAPE::R::E. Jeff `japhy` Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and `perl` hacker How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart	[reply]
Re^6: regexp - replace spaces in quoted string by planetscape (Chancellor) on Sep 06, 2005 at 14:45 UTC
Oopsie. I'm on drugs - that's my excuse. (No, really - oral surgery last Wednesday. That's my story, and I'm sticking to it!) Corrected stuff: The regular expression: (?-imsx:(".?")) matches as follows: NODE EXPLANATION ---------------------------------------------------------------------- (?-imsx: group, but do not capture (case-sensitive) (with ^ and $ matching normally) (with . not matching \n) (matching whitespace and # normally): ---------------------------------------------------------------------- ( group and capture to \1: ---------------------------------------------------------------------- " '"' ---------------------------------------------------------------------- .? any character except \n (0 or more times (matching the least amount possible)) ---------------------------------------------------------------------- " '"' ---------------------------------------------------------------------- ) end of \1 ---------------------------------------------------------------------- ) end of grouping ---------------------------------------------------------------------- [download] The point about YAPE::Regex::Explain being useful to someone learning regexes is still perfectly valid, despite my mistake. :-) planetscape	[reply] [d/l]
Re^6: regexp - replace spaces in quoted string by halley (Prior) on Sep 06, 2005 at 14:19 UTC
Sounds like a feature request to me. ;) Another suggestion: if the whole regex is surrounded by a fully qualified `(?xi-sm: ... )` block, then it's likely created by the `qr//` stringification, and not as presented. I would consider stripping that off and then explain the modes at the end along with any `/g /e` explanations. -- `[ e d @ h a l l e y . c c ]`	[reply] [d/l] [select]