Wow! Never heard about.  

On Monday, July 27, 2015 at 3:09:16 PM UTC-4, Ganesh Ranganathan wrote:
>
>
> On Mon, Jul 27, 2015 at 11:39 PM, Sage Jankowitz <[email protected] 
> <javascript:>> wrote:
>
>> I would like to uninstall all versions 3 or greater so I can work
>> through this project. I have been trying for most of today and I just
>>
>
> ​Use the command *rvm gemset create* to create a fresh new gemset where 
> you can install the version of your choice. To move to that gemset, just 
> type rvm use 2.0.0@GemsetName where 2.0.0 is the binary ruby version and 
> GemsetName is your gemset. 
>
> This allows you to dynamically switch between gemsets and not worry about 
> ​uninstalling and installing individual gems and their dependencies
>
> Thanks,
> Ganesh
>
>

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