How can I remove a default gem? ! want to uninstall a gem 1.7.7 version of json

Question

I have the same rails app in OSX and Ubuntu, I want to use Zeus to speed up my rspec. In Ubuntu, Zeus starts Ok, but in OSX it always be crashed. At last I find the issue,

Answer 1

may be this will help you....

bundle exec gem uninstall GEM_NAME

if above cmd not work then try this

execute this either in irb or in a script proper:

`gem list --no-versions`.split("\n").each do |gem|
  `gem list -d #{gem}`.gsub(/Installed at(.*):.*/).each do |dir|
    dir = dir.gsub(/Installed at(.*): /,'').gsub("\n", '')
    system "gem uninstall #{gem} -aIx -i #{dir}"
  end  
end

if above both are fails then try this

go to your rvm dir.. where all gems are install then manually remove that gem which you want.. such as in my case my gem dir location is /home/user_name/.rvm/gems/ruby-1.9.3-p194/gems