rubygems - How to search for gems inside of Ruby code, or where did Gem::RemoteInstaller go? -

In Ruby Cookbook recipe 18.1, it is said that

  gem :: Remote Installer New.search ('rails')    can search gems at remote sites, default on rubygems.org  
 but I have Ruby 1.8.6, 1.8 Tried .7, and 1.9.2, and all of this says  
 in  `   I have tried before  
  requires' rubygems'  < / Pre>  and even  
  is required 'rubygems / remote_installer'    What is the use of gem inside Ruby? Is there any new way?  
 (Please do not reply to the system like "gem list rail")   
 
   Gems: Remote installer  has been removed from Rubiagam since version 1.0, it was some time ago.If you seek the ability to set someone with a gem Those who do not need, then I strongly suggest the  bundler  (a right, you can try:  
  requires 'rubygems' R = Gem :: SpecFetcher.new r.suggest_gems_from_name ('Rail') = & Gt; ["Rail"]    

 


  







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