in reply to Can qr be un-compiled?

As is pointed out above, Perl regexen and JavaScript regexen are similar but different sublanguages. For simple stuff you may be able to get away with passing JS the stringified version, but a safer alternative would be to use YAPE::Regex to get a parse tree you could walk and translate/downgrade to something suitable for JS.

The cake is a lie.
The cake is a lie.
The cake is a lie.

Replies are listed 'Best First'.
Re^2: Can qr be un-compiled?
by massa (Hermit) on Feb 03, 2009 at 15:34 UTC 
    sub re_p2js {
  local @_ = @_;
  for( @_ ) {
    1 while s[^\(\?(\w*)-?\w*:(.*)\)$][/$2/$1]
  }
  @_
}

print for re_p2js qr/abcde/, qr/(1|2)z$/, qr/^abcd*/ims

    [download]
    This will extract the outer (?-xims:) -- and it may be enough for your purposes but, as others already posted, it will not compile perl regexen into js regexen.

    UPDATE: changed to respect the flags. The output will be:

    /abcde/
/(1|2)z$/
/^abcd*/msi

    [download]
    []s, HTH, Massa (κς,πμ,πλ)
[reply]
[d/l]
[select]
      Fails for qr/\//
[reply]
[d/l]
      Perfect, thanks :)
[reply]

In Section Seekers of Perl Wisdom