ruby on rails - delete last value of a splitted string -

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I want to look at a hash but the last value should be:

parameter controller Send to 

  {"User" => {"Email" = & gt; "A@a.fr, lol@lol.fr"}   
  Method   
  def set_users @users = params [ : User] [: email] logger.debug "# {@ users.split (", "}". Each {| e | insert E}} "end   
  log < / Strong>  
  a@a.fr Eligible @ Lol.fr ["a@a.fr", "lol@lol.fr"]   
 The issue is that the #Eech value (["a@a.fr", "Lol@lol.fr"]) which is not in the hash   
 
 
 I will do this:   
 P 
  @ users.split (", ") [0 ..- 2] Meaning, take everything but ultimate.  
 therefore:  
  logger.debug @ users.split (",") [0 ..- 2] .join (',')  < / Pre> 
 
 You just need to:  
  logger.debug @users

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