There is an RVM gemset rename command. I&#39;m not sure when it was introduced but it is present in 1.0.16. 

    rvm gemset rename current_gemset_name new_gemset_name


As of RVM 1.21 or higher it will automatically switch you to the newly renamed gemset. 

If you are on an older version of RVM you&#39;ll also need to switch to the newly created gemset, as follows: 

    rvm gemset use new_gemset_name

Running the command `rvm gemset list` will tell you the current gemset you are operating within.

I copied one with

    rvm gemset copy &lt;gemset_from&gt; &lt;gemset_dest&gt;

and then deleted the previous one with

    rvm gemset delete &lt;gemset_from&gt; 

It&#39;s a RVM bug!

Solved in this pull request: https://github.com/wayneeseguin/rvm/issues/592#issuecomment-2705466
Commit: https://github.com/jwhitley/rvm/commit/619e5265927cf6c842ec3561345569af474ed20e



If you get the error that your gemset doesn&#39;t exist, but it exist you have to chose appropriate ruby version!

For example, if you have gemset ree@something-x and you current rvm (rvm current) is ruby-1.9.3-p194 then you have to execute

    rvm use ree

and then

    rvm gemset rename something-x something-y

It works with rvm version 1.16.17

Note: This is a question about simulating the **Browser** on the iPhone, not simulating the whole device. I know that iPhone-device simulation is not possible on Windows, as [discussed at length here][1].

I have a web site that looks really weird when viewed on an iPhone - its some sort of CSS issue.

The same issue does not occur when I view the site in Safari for Windows (or any other Windows browser for that matter).

So, are there any good iPhone **Browser** simulators that run on windows? I.e. that render a site in the same way that the iPhone browser does.

*Bonus points if there&#39;s some way of inspecting the CSS in detail, as with Chrome&#39;s &#39;inspect element&#39; developer feature.*

edit: for the curious, the rendering problem that I&#39;m trying to solve is described here:  https://stackoverflow.com/questions/3884444/css-background-image-rendering-differently-on-iphone


  [1]: https://stackoverflow.com/questions/113547/iphone-development-on-windows

iPhone Browser simulator for Windows?

A gated check-in will create a change-set whose name is ended with \*\**NO_CI***? What is that NO_CI stand for? I can just think of &quot;no check in errors&quot; but it doesn&#39;t make sense.

What does ***NO_CI*** stand for?

Is there an RVM command to simply rename a gemset?  I couldn&#39;t find it on the RVM site.

How do I rename a gemset?

<p>Is there an RVM command to simply rename a gemset?  I couldn't find it on the RVM site.</p>


I&#39;m looking for a good, solid reference for proper RDoc syntax. Recommendations? I can&#39;t seem to find anything that clearly shows:

1. How to document class methods and their parameters
2. How to document what a class or class method does.

Is there a good, solid reference for proper RDoc syntax?

I have the following object that has been created

    @post = Post.create(:name =&gt; &#39;test&#39;, :post_number =&gt; 20, :active =&gt; true)

Once this is saved, I want to be able to get the object back to a hash, e.g. by doing somthing like:

    @object.to_hash

How is this possible from within rails?

Rails Object to hash

I would like to know how to parse a YAML file with the following contents:

    --- 
    javascripts: 
    - fo_global:
      - lazyload-min
      - holla-min

Currently I am trying to parse it this way:

    @custom_asset_packages_yml = (File.exists?(&quot;#{RAILS_ROOT}/config/asset_packages.yml&quot;) ? YAML.load_file(&quot;#{RAILS_ROOT}/config/asset_packages.yml&quot;) : nil)
        if !@custom_asset_packages_yml.nil?
          @custom_asset_packages_yml[&#39;javascripts&#39;].each{ |js|
            js[&#39;fo_global&#39;].each{ |script|
             script
            }
          }
        end

But it doesn&#39;t seem to work and gives me an error that the value is nil.

    You have a nil object when you didn&#39;t expect it!
    You might have expected an instance of Array.
    The error occurred while evaluating nil.each

If I try this, it puts out the entire string (fo_globallazyload-minholla-min):

    if !@custom_asset_packages_yml.nil?
              @custom_asset_packages_yml[&#39;javascripts&#39;].each{ |js|
                js[&#39;fo_global&#39;]
              }
            end





How do I parse a YAML file in Ruby?

I get the following output from the *sudo bundle install* command:

    Fetching source index for `http://rubygems.org/`  
    Could not reach rubygems repository `http://rubygems.org/`  
    Could not find gem &#39;rspec-rails (&gt;= 2.0.0.beta.22, runtime)&#39; in any of the gem sources.

I have $http_proxy set correctly and I&#39;ve added *gem: --http-proxy=my proxy* to ~/.gemrc. These settings are what allow my gem commands to work, and I was hoping they would translate to bundler, but no such luck.

Thinking sudo might not inherit my all of my environment, I also added those settings to my root user, but nada.

At this point bundler is preventing me from deploying my application, and I can find very few others running into this. If no one has an answer I will be forced to rip bundler out of my Rails app (which I wouldn&#39;t mind doing...)


How to use bundler behind a proxy?

I have a Ruby array

    &gt; list = Request.find_all_by_artist(&quot;Metallica&quot;).map(&amp;:song)
    =&gt; [&quot;Nothing else Matters&quot;, &quot;Enter sandman&quot;, &quot;Enter Sandman&quot;, &quot;Master of Puppets&quot;, &quot;Master of Puppets&quot;, &quot;Master of Puppets&quot;]

and I want a list with the counts like this:

    {&quot;Nothing Else Matters&quot; =&gt; 1,
     &quot;Enter Sandman&quot; =&gt; 2,
     &quot;Master of Puppets&quot; =&gt; 3}

So ideally I want a hash that will give me the count and notice how I have `Enter Sandman` and `enter sandman` so I need it case insensitive. I am pretty sure I can loop through it but is there a cleaner way?

Ruby: How to group a Ruby array?

&gt; **Possible Duplicate:**  
&gt; [How to remove rvm (ruby version manager) from my system?](https://stackoverflow.com/questions/3558656/how-to-remove-rvm-ruby-version-manager-from-my-system)  

&lt;!-- End of automatically inserted text --&gt;

How can I uninstall (or reinstall) RVM on Ubuntu 9.10? I messed up my current installation.

How to Uninstall RVM?

I want to switch between rails 2.3.10 as the &quot;active&quot; gem for my OS, so that I can invoke it at the command line.

Is it possible to do this? I&#39;m not using rvm. Maybe it&#39;s time to start.

I tried `gem install rails --version=2.3.10`, but that just makes sure that version of the gem is installed, it doesn&#39;t put it in `/usr/bin/rails`.

(I do already use bundler for my apps -- but haven&#39;t needed any precise control over gems at the OS level until now)

How do I &quot;activate&quot; a different version of a particular gem?

I&#39;ve installed rvm as a way of making sure that my local development version of ruby is the same as my server&#39;s for a particular app i work on (ruby 1.8.7).  I&#39;ve done this, and installed ruby 1.8.7 ok.  However, when i try to start the rails console i get this error:

    Readline was unable to be required, if you need completion or history install readline then reinstall the ruby.
    You may follow &#39;rvm notes&#39; for dependencies and/or read the docs page http://rvm.beginrescueend.com/packages/readline/ . Be sure you &#39;rvm remove X ; rvm install X&#39; to re-compile your ruby with readline support after obtaining the readline libraries.
    Couldn&#39;t load Wirble: no such file to load -- wirble

I&#39;ve read the notes on the page that error refers to (http://rvm.beginrescueend.com/packages/readline/), and followed the instructions, which involve basically installing readline, uninstalling ruby 1.8.7, then installing ruby 1.8.7 again with readline support.  (actually that page uses ruby 1.9.2 as an example but i&#39;m assuming it should work with 1.8.7 as well.  Perhaps that&#39;s not the case).

But, i still get the same error.  Has anyone else been through this and figured it out?  
Grateful for any advice - max

EDIT - i&#39;m using Ubuntu 9.10 btw in case that&#39;s relevant.

EDIT - here&#39;s my output for `rvm info` as asked for below:

    $ rvm info

    system:

      system:
        uname:       &quot;Linux max-laptop 2.6.31-22-generic #68-Ubuntu SMP Tue Oct 26 16:38:35 UTC 2010 i686 GNU/Linux&quot;
        bash:        &quot;/bin/bash =&gt; GNU bash, version 4.0.33(1)-release (i486-pc-linux-gnu)&quot;
        zsh:         &quot; =&gt; not installed&quot;

      rvm:
        version:      &quot;rvm 1.1.6 by Wayne E. Seguin (wayneeseguin@gmail.com) [http://rvm.beginrescueend.com/]&quot;

      homes:
        gem:          &quot;not set&quot;
        ruby:         &quot;not set&quot;

      binaries:
        ruby:         &quot;/usr/bin/ruby&quot;
        irb:          &quot;/usr/bin/irb&quot;
        gem:          &quot;/usr/bin/gem&quot;
        rake:         &quot;/usr/bin/rake&quot;

      environment:
        PATH:         &quot;/home/max/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/var/lib/gems/1.8/bin:/home/max/software/svnmerge:/home/max/.gem/ruby/1.8/bin:/home/max/work/e_learning_resource/trunk/public/assets/dvd_files/bin:/opt/firefox:/home/max/.rvm/bin:/home/max/.rvm/bin&quot;
        GEM_HOME:     &quot;&quot;
        GEM_PATH:     &quot;&quot;
        MY_RUBY_HOME: &quot;&quot;
        IRBRC:        &quot;&quot;
        RUBYOPT:      &quot;&quot;
        gemset:       &quot;&quot;


Problems with the rails console, RVM and readline

My current version of ruby is `ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.5.0]` but I want to update it to the latest patch level using rvm. How can I do this?



How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?

I read &quot;https://stackoverflow.com/questions/4361645/relationships-between-rubygems-bundler-and-rvm&quot; before asking it again. 

Well, there are many questions like this, but people who answered say they work with Rubygems, RVM and Bundler, and they have not explained how each of these work in isolation. 

I am really confused with how the three work in isolation when we are installing gems. Please do not tell me how you work, which will help me, but I won&#39;t learn what is happening when we play with them.

My confusion can be broken down into these questions. Where is a gem installed when:

1. I just have Rubygems (without RVM or Bundler)?
2. Rubygems and RVM are installed?
3. Rubygems, RVM and Bundler are installed?

Please help me understand this stuff with either resources on the web or by your detailed answers.


Content Type	Original Author	Original Content on Stackoverflow
Question	Jason Galvin	View Question on Stackoverflow
Solution 1 - Ruby	pakeha	View Answer on Stackoverflow
Solution 2 - Ruby	DanielG	View Answer on Stackoverflow
Solution 3 - Ruby	Fernando Kosh	View Answer on Stackoverflow
Solution 4 - Ruby	Zeke Fast	View Answer on Stackoverflow

How do I rename a gemset?

Ruby Problem Overview

Ruby Solutions

Solution 1 - Ruby

Solution 2 - Ruby

Solution 3 - Ruby

Solution 4 - Ruby

What does NO_CI stand for?

iPhone Browser simulator for Windows?

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