From: "Abhishek K." <lists@...>
Date: 2012-10-04T19:32:11+09:00
Subject: Re: How to get installed module version

Lars Haugseth wrote in post #1078607:
> On 10/04/2012 12:03 PM, Abhishek K. wrote:
>>>
>>> nokogiri (1.5.5, 1.5.0)
>>
>> Thanks Jesus, is there any way i can get by ruby command like
>>
>> ruby1.8 -rMODULE -e 'puts ....'
>> ruby1.9.1 -rMODULE -e 'puts ....'
>
> If you want to search for more information on this topic, note that the
> correct term for "modules" in the Ruby world is "gems".
>
> You can get at information about installed gems from Ruby code through
> the Gem::Specification class.
>
>    http://rubygems.rubyforge.org/rubygems-update/Gem/Specification.html
>
> What are you going to do with that information, though? If your code
> depends on certain versions of gems, you should take a look at Bundler.
>
>    http://gembundler.com/
thanks for your responce

I need to check what all gems(modules) installed and what is therir 
version on each version of ruby, we have two version installed ruby1.8 
and ruby1.92

i am looking something we do in perl and python same way in ruby like

perl -MABC -e 'print "$ABC::VERSION"'

python -c "import MODULE; print (MODULE.__version__)";

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