Oniguruma: Different result in ruby 1.9.1 and 1.8.7

[Miguel Teixeira]

Hi,

I have the following regular expression created in ruby 1.9.1:

/(??:\$(?'name1'[\w\s\']+)(??'name2'(?:created|developed)[\w\s]+)(?name3'(?:in|at)[\w\s]+)))|(?:\$(?'name1'[\w\s\']+)(?'name2'?created|developed)[\w\s]+))|(?:\$(?'name1'[\w\s\']+)(?'name3'(?:in|at)[\w\s]+)))(?:\.(?'name4'[\w\s]+))?/.match(str)

To use Oniguruma i have installed the following gem:
http://github.com/geoffgarside/oniguruma/tree/master

(also tried with this solution:
http://www.goodbyehelicopter.com/2008/02/20/install-oniguruma-on-os-x/)

After the installation of Oniguruma i have created the following regular
expression in ruby 1.8.7:
Oniguruma::ORegexp.new('(??:\$(?\'name1\'[\w\s\']+)(??\'name2\'(?:created|developed)[\w\s]+)(?\'name3\'(?:in|at)[\w\s]+)))|(?:\$(?\'name1\'[\w\s\']+)(?\'name2\'?created|developed)[\w\s]+))|(?:\$(?\'name1\'[\w\s\']+)(?\'name3\'(?:in|at)[\w\s]+)))(?:\.(?\'name4\'[\w\s]+))?').match(str)

My problem is that the result in ruby 1.8.7 is different from the result
in 1.9.1.
Anyone has an idea about what's going on?

I also tried to substitute ?\'name1\' with ?<name1>


Thanks,

 

[Aaron Patterson]

Hi,

I have the following regular expression created in ruby 1.9.1:

/(??:\$(?'name1'[\w\s\']+)(??'name2'(?:created|developed)[\w\s]+)
(?name3'(?:in|at)[\w\s]+)))|(?:\$(?'name1'[\w\s\']+)(?'name2'?
created|developed)[\w\s]+))|(?:\$(?'name1'[\w\s\']+)(?'name3'(?:in|
at)[\w\s]+)))(?:\.(?'name4'[\w\s]+))?/.match(str)

To use Oniguruma i have installed the following gem:
http://github.com/geoffgarside/oniguruma/tree/master

(also tried with this solution:
http://www.goodbyehelicopter.com/2008/02/20/install-oniguruma-on-os-
x/)

After the installation of Oniguruma i have created the following
regular
expression in ruby 1.8.7:
Oniguruma::ORegexp.new('(??:\$(?\'name1\'[\w\s\']+)(??
\'name2\'(?:created|developed)[\w\s]+)(?\'name3\'(?:in|at)[\w\s]+)))|
(?:\$(?\'name1\'[\w\s\']+)(?\'name2\'?created|developed)[\w\s]+))|
(?:\$(?\'name1\'[\w\s\']+)(?\'name3\'(?:in|at)[\w\s]+)))(?:\.(?
\'name4\'[\w\s]+))?').match(str)

My problem is that the result in ruby 1.8.7 is different from the
result
in 1.9.1.
Anyone has an idea about what's going on?

I also tried to substitute ?\'name1\' with ?<name1>

That expression is rather long. Have you tried reducing the regular
expression to the smallest possible case that will make it break?

 

[Robert Klemme]

I have the following regular expression created in ruby 1.9.1:

/(??:\$(?'name1'[\w\s\']+)(??'name2'(?:created|developed)[\w\s]+)(?na= me3'(?:in|at)[\w\s]+)))|(?:\$(?'name1'[\w\s\']+)(?'name2'?created|develop=
ed)[\w\s]+))|(?:\$(?'name1'[\w\s\']+)(?'name3'(?:in|at)[\w\s]+)))(?:\.(?'na=
me4'[\w\s]+))?/.match(str)

To use Oniguruma i have installed the following gem:
http://github.com/geoffgarside/oniguruma/tree/master

(also tried with this solution:
http://www.goodbyehelicopter.com/2008/02/20/install-oniguruma-on-os-x/)

After the installation of Oniguruma i have created the following regular
expression in ruby 1.8.7:
Oniguruma::ORegexp.new('(??:\$(?\'name1\'[\w\s\']+)(??\'name2\'(?:cre= ated|developed)[\w\s]+)(?\'name3\'(?:in|at)[\w\s]+)))|(?:\$(?\'name1\'[\w\s=
\']+)(?\'name2\'?created|developed)[\w\s]+))|(?:\$(?\'name1\'[\w\s\']+)(?=
\'name3\'(?:in|at)[\w\s]+)))(?:\.(?\'name4\'[\w\s]+))?').match(str)

My problem is that the result in ruby 1.8.7 is different from the result
in 1.9.1.
Anyone has an idea about what's going on?

What differences did you observe? Against which text did you match?

To simplify your tests I would create both regular expressions via the
string method. Then you can be sure to use the same string and not
fall culprit of some conversion or typing errors.

Kind regards

robert

--=20
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

 

[Miguel Teixeira]

Hi robert,

The problem is that in ruby 1.8.7 is impossible (?) to use string method
with oniguruma (the default regular expression engine is different).

The differences that i observe is the match's for the cases where the
(created|developed) and (in|at) groups should be matched.

 

[Robert Klemme]

The problem is that in ruby 1.8.7 is impossible (?) to use string method
with oniguruma (the default regular expression engine is different).

Apparently you are not getting my point - maybe I wasn't clear enough.
I suggested to *create* the regular expression via a String, i.e.
Regexp.new(s) and Oniguruma::ORegexp.new(s).

The differences that i observe is the match's for the cases where the
(created|developed) and (in|at) groups should be matched.

What difference do you observe? You are not really providing much
information to answer your question. You could do yourself a favor and
simply post a script or IRB session showing the different behavior.

http://catb.org/~esr/faqs/smart-questions.html

Cheers

robert

 

[Miguel Teixeira]

Hi robert,

I get the same result when trying the match via Regexp.new.


Maybe the version of origuruma is different, i will try to create a
different regular expression (more simple) this times using ruby 1.8.7
regular expression engine.

Thanks for the help.